Assessment of Radioactive Materials in Albite Granites from Abu Rusheid and Um Naggat, Central Eastern Desert, Egypt

: The present study aims to assess Abu Rusheid and Um Naggat albite granite’s natural radioactivity in the Central Eastern Desert, Egypt, using an HPGe laboratory spectrometer. A total of 17 albite granite samples were detected for this study. The activity concentrations were estimated for 238 U (range from 204 to 1127 Bq/kg), 226 Ra (range from 215 to 1300 Bq/kg), 232 Th (from 130 to 1424 Bq/kg) and 40 K (from 1108 to 2167 Bq/kg) for Abu Rusheid area. Furthermore 238 U (range from 80 to 800 Bq/kg), 226 Ra (range from 118 to 1017 Bq/kg), 232 Th (from 58 to 674 Bq/kg) and K (from 567 to 2329 Bq/kg) for the Um Naggat area. The absorbed dose rates in the outdoor air were measured with average values of 740 nGy/h for Abu Rusheid albite granite and 429 nGy/h for Um Naggat albite granite. The activity concentration and gamma-ray exposure dose rates of the radioactive elements 238 U, 226 Ra, 232 Th and 40 K at Abu Rusheid and Um Naggat exceeded the worldwide average values that recommend the necessity of radiation protection regulation. Moreover, the corresponding outdoor annual effective dose (AED out ) was calculated to be 0.9 and 0.5 mSv y − 1 for Abu Rusheid and Um Naggat albite granite, respectively, which are lower than the permissible level (1 mSv y − 1 ). By contrast, the indoor annual effective dose (AED in ) exceeded the recommended limit (3.6 and 2.1 for Abu Rusheid and Um Naggat, respectively). Therefore, the two areas are slightly saving for development projects concerning the use of the studied rocks. The statistical analysis displays that the effects of the radiological hazard are associated with the uranium and thorium activity concentrations in Abu Rusheid and Um Naggat albite granites.


Introduction
Natural radioactivity in the environment is due to the presence of natural radionuclides, namely 238 U, 232 Th and 40 K, in various geological formations [1,2]. Terrestrial radiation comprises radiation emitted from these radionuclides and their progeny. 40

Abu Rusheid Area
The Abu Rusheid area is a part of the Arabian-Nubian Shield that lies in t Gemal basin and can be considered a key domain in that shield, besides its ve structures. The main rock units encountered in the Abu Rusheid area are rep albite granites, quartz amphibole schist, amphibolites, and gneisses ( Figure 2 is located between two major thrusts in the NE. The Abu Rusheid area feature zircon, fluorite, and columbite [20]. Columbite features an intermediate comp tween Fe-and Mn-columbite end-members and variable U contents (0.03 to 1.4 [21]. Thorite has also been observed. Sulphides may also be locally abundant (p copyrite, and arsenopyrite). This granite's Nb/Ta ratio is close to the average c Previously interpreted as metasomatized psammitic gneisses, these rocks fea characteristics of rare-metal granite [21] as highly fractionated to alkaline mag

Abu Rusheid Area
The Abu Rusheid area is a part of the Arabian-Nubian Shield that lies in the Wadi Al Gemal basin and can be considered a key domain in that shield, besides its very complex structures. The main rock units encountered in the Abu Rusheid area are represented by albite granites, quartz amphibole schist, amphibolites, and gneisses ( Figure 2). This area is located between two major thrusts in the NE. The Abu Rusheid area features abundant zircon, fluorite, and columbite [20]. Columbite features an intermediate composition between Fe-and Mn-columbite end-members and variable U contents (0.03 to 1.41 wt% UO 2 ) [21]. Thorite has also been observed. Sulphides may also be locally abundant (pyrite, chalcopyrite, and arsenopyrite). This granite's Nb/Ta ratio is close to the average crustal ratio. Previously interpreted as metasomatized psammitic gneisses, these rocks feature all the characteristics of rare-metal granite [21] as highly fractionated to alkaline magma.

Analytical Techniques
The collected samples were transferred to the laboratory to evaluate their radiological hazards. Next, they were stored within the plastic containers for 28 days to achieve secular equilibrium between radon and its daughters. The activity of a radioactive source is defined as the rate at which the isotope decays. Radioactivity may be thought of as the quantity of radiation produced in a given amount of time. The radioactivity concentration of the different identified radionuclides was calculated by gamma-ray spectrometry HPGe with the following simple regression [22]. The calibration energy of the gamma spectrometer system HPGe used in the investigation was accomplished with a mixed source with the same shape as the samples. At the same time, an empty container was used to identify the background counting. The radionuclide activity concentrations were computed utilizing the following equation: where A = The activity concentration of the gamma-ray spectral line in Bq/kg Net area (cps) = The net detected counts corresponding to the energy per second. ζ = The counting system efficiency of the energy. M = The mass of the sample in kg. Iγ = The intensity of the gamma-ray spectrum. In this study, 17 albite granite samples were collected from Abu Rusheid and Um Naggat. Natural radionuclides relevant to this work were mainly gamma-ray emitting nuclei in the decay series of 238 U, 235 U and 232 Th, and singly occurring 40 K. While 40 K can be measured directly by its own gamma-rays, 238 U, 235 U, and 232 Th are not directly gamma-

Analytical Techniques
The collected samples were transferred to the laboratory to evaluate their radiological hazards. Next, they were stored within the plastic containers for 28 days to achieve secular equilibrium between radon and its daughters. The activity of a radioactive source is defined as the rate at which the isotope decays. Radioactivity may be thought of as the quantity of radiation produced in a given amount of time. The radioactivity concentration of the different identified radionuclides was calculated by gamma-ray spectrometry HPGe with the following simple regression [22]. The calibration energy of the gamma spectrometer system HPGe used in the investigation was accomplished with a mixed source with the same shape as the samples. At the same time, an empty container was used to identify the background counting. The radionuclide activity concentrations were computed utilizing the following equation: where A = The activity concentration of the gamma-ray spectral line in Bq/kg Net area (cps) = The net detected counts corresponding to the energy per second. ζ = The counting system efficiency of the energy. M = The mass of the sample in kg. I γ = The intensity of the gamma-ray spectrum.
In this study, 17 albite granite samples were collected from Abu Rusheid and Um Naggat. Natural radionuclides relevant to this work were mainly gamma-ray emitting nuclei in the decay series of 238 U, 235 U and 232 Th, and singly occurring 40 K. While 40 K can be measured directly by its own gamma-rays, 238 U, 235 U, and 232 Th are not directly gamma-ray emitters, but it is possible to measure the gamma-rays of their decay products. Decay products for 238 U ( 234 Th: 63.3; 234 Pa: 1001; 214 Pb: 295 and 352 keV; and 214 Bi: 609,  1120, 1238, 1377 and 1764 keV), 235 U ( 235 U: 143,163,185 and 205 Kev) and 232 Th ( 228 Ac: 209,  338, 911 and 968 keV; 212 Bi: 727 keV; and 208 Tl: 583 keV) were used by assuming the decay series to be in secular equilibrium [23]. 40 K was determined as (1460 keV) photopeak. For the actinium series, 235 U γenergies of (143.8 keV, 163.4 keV) were taken to represent the 235 U activity [24]. Weighted averages of several decay products were used.

Radiometric Evaluation of the Studied Areas
Gamma-ray spectrometry directly measures the surface distribution of naturally occurring radioelement K, U, and Th. Potassium is a major constituent of most rocks, while uranium and thorium are present in trace amounts as mobile and immobile elements, respectively. As the concentrations of these radioelements vary between different rock types, the measured radioelement distribution can be reliably used to map and distinguish different lithologies [25].

Abu Rusheid Area
Albite granite features medium thorium, potassium and uranium contents, which are radioactive elements. A small part of the amphibole rock in the northeast region of the studied area contains high concentrations of uranium and thorium with low potassium content. Some small parts of amazonitized granite contain high concentrations of uranium, up to 200 ppm, while their potassium and thorium contents are medium. Most of the amazonitized granites are characterized by very high concentrations of thorium, up to 500 ppm, and normal potassium contents. It is noted that the uranium and thorium anomaly trends are often affected by the north-east and north-west tectonic trends in the studied area. From Table 1, it is clear that the albite granite features slightly higher eU contents (20.3 to 263 ppm, average 118.2 ppm). At the same time, the albite granite contains higher concentrations of both thorium (56-552 ppm, average 305 ppm) and potassium (3.6-7.6%, average 5.2%). The potassium-thorium cross plot is widely used to recognize clay mineral associations and to discriminate micas and feldspars [26]. As both thorium (by adsorption) and potassium (chemical composition) are associated with clay minerals, the ratio eTh/K expresses relative potassium enrichment as an indicator of clay-mineral species and might be diagnostic of other radioactive minerals [27,28]. Therefore, if eTh/K ≥ 2 × 10 −4 , the rock is thorium-rich, and if eTh/K ≤ 1 × 10 −4 , the rock is potassium-rich [29,30]. Table 1 presents the results for the Abu Rusheid area, in which the eTh/K ratio ranged from 8.4 to 48.3, with an average value of 62.6. These values are much higher than 2 × 10 −4 , which indicates that this area's albite granite is fresh.

Um Naggat Area
Considering the surface distribution of radioactive elements (K, eU, eTh) in Table 2, it is clear that Um Naggat albite granite features eU contents (13 to 105 ppm, average 54 ppm) slightly, while the albite granite contains concentrations of both thorium (35 to 280 ppm, average 97 ppm) and potassium (1.7 to 8%, average 4.5%). The eTh/K ratio ranges from 4.5 to 137.8, with an average value of 31.3. These values are much higher than 2 × 10 −4, which indicates that this area's albite granite is fresh. Figures 3 and 4 exhibit the geological map of radioactive contents (eU, eTh and K%) in the albite granite samples. As can be seen in Figure 3, the highest uranium and thorium contents observed in the studied stations are assembled in the south-west of the investigated area. By contrast, Figure 4 shows that uranium and thorium contents are predicted in the south and south-east of the studied stations in the Um Naggat area. This is due to the alteration the radioactive minerals deposited inside the cracks of the granites. Furthermore, the highest thorium activity concentrations were found in some parts of the studied area. This was due to the presence of different minerals, such as zircon, thorianite, and monazite in the granite samples. The ratio 238 U/ 232 Th demonstrates that the granite enriched with the uranium due to the leaching process from rainwater helped in the migration of uranium minerals (uranophane, uraninite, betauranophane) and precipitated at joints and faults [31].     As demonstrated in Table 5, the concentrations of all the samples were very high compared to the worldwide average, except 235 U, which is lower than the worldwide average. The average worldwide radioelement values are 32 Bq/kg for 226 Ra, 45 Bq/kg for 232 Th, and 412 Bq/kg for 40 K [2]. The 226 Ra/ 238 U for the samples were around the unity, which suggested that Abu Rusheid granites are characterized by secular uranium equilibrium. The 238 U/ 235 U activity ratio for all the samples varied between 21.1 and 21.8 in the Abu Rusheid albite granite, which agrees with the worldwide crustal average. Figure 5 represents the correlation curves of the activity concentrations between 226 Ra and 232 Th, 226 Ra and 40 K, and 232 Th and 40 K for the Abu Rusheid area. Figure 5a shows a weak correlation between 226 Ra and 232 Th (R 2 = 0.21), which could be explained by the high U-enrichment. Furthermore, there is a weak correlation between 226 Ra and 40 K (R 2 = 0.35) (Figure 5b). Moreover, there is a negative correlation between 232 Th and 40 K (R 2 =0.51) due to the high enrichment of 232 Th compared to the low 40 K-content, as shown in Figure 5c. Moreover, the 232 Th/ 238 U ratio for the Rsh (3,4,7,8,9) samples is higher than Clark's value (3.5), which indicates Th enrichment. By contrast, the samples Rsh 1, Rsh 2, Rsh 5, and Rsh 6 are less than Clark's value, indicating U-enrichment.  Figure 5 represents the correlation curves of the activity concentrations between 226 Ra and 232 Th, 226 Ra and 40 K, and 232 Th and 40 K for the Abu Rusheid area. Figure 5a shows a weak correlation between 226 Ra and 232 Th (R 2 = 0.21), which could be explained by the high U-enrichment. Furthermore, there is a weak correlation between 226 Ra and 40 K (R 2 = 0.35) (Figure 5b). Moreover, there is a negative correlation between 232 Th and 40 K (R 2 =0.51) due to the high enrichment of 232 Th compared to the low 40 K-content, as shown in Figure 5c. Moreover, the 232 Th/ 238 U ratio for the Rsh (3,4,7,8,9) samples is higher than Clark's value (3.5), which indicates Th enrichment. By contrast, the samples Rsh 1, Rsh 2, Rsh 5, and Rsh 6 are less than Clark's value, indicating U-enrichment. The concentrations and distribution of radionuclides in the eight studied samples from the um Naggat area were determined using an HPGe spectrometer to evaluate the The concentrations and distribution of radionuclides in the eight studied samples from the um Naggat area were determined using an HPGe spectrometer to evaluate the environmental radioactivity. Table 6 shows the activity concentration of the 238 U series of the Um Naggat albite granite samples. The activity concentrations of the 238 U series included 234m Pa that varied from 79.3 to 753.7 Bq/kg, 234 Th that varied from 80.9 to 847.2 Bq/kg. Meanwhile, the 232 Th series features values of 228 Ac ranges from 54.7 to 632.1 Bq/kg, 208 Tl ranges from 56.9 to 668.8 Bq/kg and 212 Bi ranges from 63.2 to 720.9 Bq/kg, as shown in Table 7. In Table 8, the concentrations of the radioelements in all the samples from the Um Naggat area are higher than the worldwide average, except 235 U, which is lower than the worldwide average, while samples UNg 1 and UNg 5 are higher than the worldwide average. The activity ratio 226 Ra/ 238 U was calculated for all the samples. It showed a disequilibrium between 226 Ra and 238 U, except in samples UNg 1, UNg 4, and UNg 7. The 238 U/ 235 U activity ratio for all the samples varied between 21.1 and 21.7, with an average of 21.5, which is close to the worldwide average. The correlation curves of the activity concentrations between 226 Ra and 232 Th, 226 Ra and 40 K, and 232 Th and 40 K from the Um Naggat area are shown in Figure 6. The correlation between 226 Ra and 232 Th (R 2 = 0.42) is considered a positive relationship, as shown in Figure 6a, whereas the relationship between 40 K and both 226 Ra and 232 Th is a negative correlation, with values of R 2 = 0.60 and R 2 = 0.31, respectively, as shown in Figure 6b,c. This also demonstrates the geological characteristics of the granite rocks in the investigated location, where an alteration resulted in the appearance of heavy minerals such as uranothorite, uranophane autunite, and thorite. Rutile, samarskite, columbite, xenotime, monazitezircon, fluorite, and fergusonite are examples of uncommon metals. Meanwhile, the 232 Th/ 238 U ratio for most samples was less than Clark's value (3.5), indicating and confirming the U-enrichment of the albite granite in the Um Naggat area.

Radiometric Evaluation of the Studied Areas
activity ratio for all the samples varied between 21.1 and 21.7, with an average of which is close to the worldwide average. The correlation curves of the activity conce tions between 226 Ra and 232 Th, 226 Ra and 40 K, and 232 Th and 40 K from the Um Naggat are shown in Figure 6. The correlation between 226 Ra and 232 Th (R 2 = 0.42) is consider positive relationship, as shown in Figure 6a, whereas the relationship between 40 K both 226 Ra and 232 Th is a negative correlation, with values of R 2 = 0.60 and R 2 = 0.31, res tively, as shown in Figure 6b,c. This also demonstrates the geological characteristics o granite rocks in the investigated location, where an alteration resulted in the appear of heavy minerals such as uranothorite, uranophane autunite, and thorite. Rutile, sa skite, columbite, xenotime, monazitezircon, fluorite, and fergusonite are examples o common metals. Meanwhile, the 232 Th/ 238 U ratio for most samples was less than Cl value (3.5), indicating and confirming the U-enrichment of the albite granite in the Naggat area.

Radiation Health Hazards
The assessment of the radiation doses received by humans from natural sources special importance because the absorbed dose by γ-ray exposure depends not only o γ-ray energy but also on the material, owing to changes in its physical properties [32 There is concern that some rocks transmit excessive radiation doses to the body due t γ-rays emitted by the 232 Th decay chain; the 214 Pb and 214 Bi progeny of 226 Ra and 40 K contribute to the total body radiation dose. The absorbed dose rates one meter from studied rocks due to their terrestrial radioactivity are calculated using the following e tion; Dair (nGy/h) = KRa ARa + KTh ATh + KK AK

Radiation Health Hazards
The assessment of the radiation doses received by humans from natural sources is of special importance because the absorbed dose by γ-ray exposure depends not only on the γ-ray energy but also on the material, owing to changes in its physical properties [32,33]. There is concern that some rocks transmit excessive radiation doses to the body due to the γ-rays emitted by the 232 Th decay chain; the 214 Pb and 214 Bi progeny of 226 Ra and 40 K also contribute to the total body radiation dose. The absorbed dose rates one meter from the studied rocks due to their terrestrial radioactivity are calculated using the following equation; D air (nGy/h) = K Ra A Ra + K Th A Th + K K A K (2) where D air is the absorbed dose rate (nGy/h) 1 m from the surface of the albite granite and A Ra , A Th , and A K represent the activity concentrations of Ra, Th, and K, respectively. Furthermore, K K , K Th , and K Ra are the conversion factors (or dose rate coefficients) expressed in (nGy/h per Bq/kg) for potassium (0.043), thorium (0.662), and radium (0.427), respectively [34]. However, direct measurements of absorbed dose rates in the air have been carried out in many countries around the world. The values of the absorbed dose rates 1 m from the surface of the albite granitic rocks at nine and eight locations distributed over Abu Rusheid and Um Naggat areas, respectively, are presented in Tables 9 and 10. The population weighted average is 59 nGy/h [3]. Table 9. The statistical analysis of the activity concentration of 226 Ra, 232 Th, and 40 K, radium equivalent Ra eq (Bq/kg), external hazard index (H ex ), internal hazard index (H in ), representative gamma index (Iγ), absorbed dose rate, D air (nGy h −1 ), outdoor annual effective dose, AED out (mSv), indoor effective dose, AED in (mSv), annual gonadal dose equivalent, AGDE (mSv), and excess lifetime cancer (ELCR) at Abu Rusheid, Central Eastern Desert, Egypt.

Parameters N Average SD Min Max
The activity levels of 226 Ra, 232 Th, and 40 K in the examined granitic samples can be determined using the radium equivalent activity (Ra eq ) index. This index can be calculated using the following equation [36]: Ra eq (Bq/kg) = A Ra + 1.43A Th + 0.077A K The average obtained values were 1672 and 944 Bq·kg −1 from the samples from Abu Rusheid and Um Naggat, respectively. The average was five and three times higher than the recommended limit (370 Bq·kg −1 ) (see Tables 9 and 10), which keeps the external dose below 1.5 mSv·y −1 [37]. This illustrates that the studied samples are not safe to apply in the building materials and the infrastructure fields.
External and internal hazard indices (H ex and H in ) were utilized to compute the rate of radiation dose released by natural terrestrial radionuclides in the investigated samples [38]. Furthermore, a group of experts suggested another index that could be used to estimate the level of γ-radiation hazard associated with the natural radionuclides in the samples due to the different combinations of specific natural activities in the sample [38].
Tables 9 and 10 demonstrate that the average values of H ex and H in in all the measured stations of albite granite samples at Abu Rusheid (six and five, respectively) and Um Naggat (four and three, respectively) are observed to be higher than unity (Figure 7). The H ex and H in values reveal that the albite granites would exert adverse health effects linked to external gamma radiation and radon gas and its decay products [6]. The data average varied from 3 to 6 at Um Naggat and Abu Rusheid, respectively. The I γ index is higher than the permissible limit compared with unity ( Figure 7).  The annual gonadal dose equivalent (AGDE) is the radiological factor used to detect the associated dose of organs per year for people, especially the gonads. The date of AGDE is computed based on the gamma radiation released from the natural radionuclides and is computed from the Equation (8) [39]: AGDE (mSv·y −1 ) = 3.09A Ra + 4.18A Th + 0.314A K (8) Tables 9 and 10 reveal the statistical results of AGDE calculated for all the albite granites in the examined areas. The AGDE values exceeded the permissible limit of 0.3 mSv·y −1 [40]. At Abu Rusheid, the range of AGDE values was 2 mSv·y −1 to 8 mSv·y −1 with an average value of 5 mSv·y −1 (Table 9), while the minimum and maximum values were 1 mSv·y −1 and 6 mSv· y −1 , with the average an value of 3 mSv·y −1 in the Um Naggat area (Table 10). Thus, the application of albite granites in building materials would entail significant health risks.
The excess lifetime cancer risk (ELCR) is the radioactive parameter is applied to predict the cancer risk associated with long exposure to albite granites. The following equation can be utilized to compute ELCR [41]: The computation depends on the outdoor annual effective dose (AED out ), the duration of life (DL, 70 years), and the risk factor for cancer (RF, 0.05 Sv −1 ), as recommended by ICRP (International Commission of Radiation Protection).
Tables 9 and 10 display the ELCR date for the albite granite samples detected at Abu Rusheid and Um Naggat. The ELCR values ranged from 1 × 10 −3 to 5 × 10 −3 , with a mean value of 3 × 10 −3 (Table 9), in Abu Rusheid, while the values ranged from 1 × 10 −3 to 4 × 10 −3 , with an average value 2 × 10 −3 in Um Naggat (Table 10). This value is higher than the limit of 0.00029 of the worldwide average [42]. The ELCR values are more significant than the international mean value and suggest that long exposure to these albite granites may cause cancers and other serious diseases.

Statistical Analysis Cluster Analysis
Because of the large number of parameters in the correlation analysis data, the analysis appears to be complicated. However, the correlations between the radioactive characteristics can be recognized and exposed qualitatively using hierarchical cluster analysis (HCA). HCA is a data classification system that uses multivariate algorithms to determine real data groups. Objects are grouped in such a way that they all belong to the same category. The results with the highest degree of nearness are categorized first in hierarchical clustering, followed by the next most similar data. The process is continued until all of the information has been classified. The degrees of similarity at which the data mix are used to create a dendrogram. A similarity of 100% indicates that the clusters are divided from comparable sample measures by zero distance, whereas a similarity of 0% indicates that the clustering regions are as unlike as the least similar region. In this work, Ward's strategy of cluster analysis was applied. Ward's method is a connection procedure for estimating the Euclidean distance between the activity concentrations of radionuclides and radiological parameters [43] (Figure 8a,b). Three clusters were plotted in the dendrogram of the examined results of the two studied areas. At Abu Rusheid, cluster I consisted of 226 Ra, while cluster II included 232 Th and the corresponding radiological hazard parameters. At the same time, Cluster III included the 40 K activity concentration. Moreover, at Um Naggat, cluster I contained 226 Ra and the corresponding radiological parameters, while cluster II included the 232 Th and 40 K activity concentration observed in cluster III. Thus, it can be concluded that the radioactivity and radiation exposure of albite granites was linked mainly to the radium and thorium activity concentrations. ological parameters [43] (Figure 8a,b). Three clusters were plotted in the dendrogram of the examined results of the two studied areas. At Abu Rusheid, cluster I consisted of 226 Ra, while cluster II included 232 Th and the corresponding radiological hazard parameters. At the same time, Cluster III included the 40 K activity concentration. Moreover, at Um Naggat, cluster I contained 226 Ra and the corresponding radiological parameters, while cluster II included the 232 Th and 40 K activity concentration observed in cluster III. Thus, it can be concluded that the radioactivity and radiation exposure of albite granites was linked mainly to the radium and thorium activity concentrations.

Conclusions
This study aimed to assess the radioactivity released from albite granite rocks, which may be used in different infrastructure applications. A statistical analysis was performed to show the geological processes that are thought to increase the radioactive contents in the albite granite. The activity concentrations estimated for 238 U (range from 204 to 1127 Bq/kg), 226 Ra (range from 215 to 1300 Bq/kg), 232 Th (from 130 to 1424 Bq/kg), and 40 K (from 1108 to 2167 Bq/kg) in the Abu Rusheid area, as well as 238U (range from 80 to 800 Bq/kg), 226 Ra (range from 118 to 1017 Bq/kg), 232 Th (from 58 to 674 Bq/kg), and 40 K (from 567 to 2329 Bq/kg) in the Um Naggat area, were significantly higher than the worldwide average values. Furthermore, the radiological hazard factors were estimated in the albite granite samples and found to be higher than the approved levels. This is linked to the alteration in the radioactive minerals and rare metals in the studied albite granites. Therefore, the albite granites in the investigated areas exert adverse health effects and cannot be utilized in building materials and numerous infrastructure fields.

Conclusions
This study aimed to assess the radioactivity released from albite granite rocks, which may be used in different infrastructure applications. A statistical analysis was performed to show the geological processes that are thought to increase the radioactive contents in the albite granite. The activity concentrations estimated for 238 U (range from 204 to 1127 Bq/kg), 226 Ra (range from 215 to 1300 Bq/kg), 232 Th (from 130 to 1424 Bq/kg), and 40 K (from 1108 to 2167 Bq/kg) in the Abu Rusheid area, as well as 238U (range from 80 to 800 Bq/kg), 226 Ra (range from 118 to 1017 Bq/kg), 232 Th (from 58 to 674 Bq/kg), and 40 K (from 567 to 2329 Bq/kg) in the Um Naggat area, were significantly higher than the worldwide average values. Furthermore, the radiological hazard factors were estimated in the albite granite samples and found to be higher than the approved levels. This is linked to the alteration in the radioactive minerals and rare metals in the studied albite granites. Therefore, the albite granites in the investigated areas exert adverse health effects and cannot be utilized in building materials and numerous infrastructure fields.