Next Article in Journal
Very Low Nucleation Rates of Glucose Isomerase Crystals under Microgravity in the International Space Station
Previous Article in Journal
Inorganic, Organic, and Perovskite Halides with Nanotechnology for High–Light Yield X- and γ-ray Scintillators
Article Menu

Export Article

Open AccessArticle
Crystals 2019, 9(2), 89; https://doi.org/10.3390/cryst9020089

Struvite Grown in Gel, Its Crystal Structure at 90 K and Thermoanalytical Study

1
Institute of Physics, Lodz University of Technology, Wólczańska 219, 90-924 Łódź, Poland
2
Institute of General and Ecological Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Łódź, Poland
*
Author to whom correspondence should be addressed.
Received: 21 December 2018 / Revised: 28 January 2019 / Accepted: 31 January 2019 / Published: 8 February 2019
(This article belongs to the Special Issue Crystal Growth in Gels)
Full-Text   |   PDF [1496 KB, uploaded 20 February 2019]   |  

Abstract

In this article, we report the crystallization of struvite in sodium metasilicate gel by single diffusion gel growth technique. The obtained crystals have a very rich morphology displaying 18 faces. In this study, the habit and morphology of the obtained struvite crystals are analyzed. The crystals were examined and identified as pure struvite by single X-ray diffraction (XRD). The orthorhombic polar noncentrosymmetric space group Pmn21 was identified. The structure of the crystal was determined at a temperature of 90 K. Our research indicates a lack of polymorphism, resulting from the temperature lowering to 90 K, which has not been previously reported. The determined unit cell parameters are as follows a = 6.9650(2) Å, b = 6.1165(2) Å, c = 11.2056(3) Å. The structure of struvite is presented here with a residual factor R1 = 1.2% at 0.80 Å resolution. We also present thermoanalytical study of struvite using thermal analysis techniques such as thermogravimetry (TG), derivative thermogravimetry (DTG) and differential thermal analysis (DTA). View Full-Text
Keywords: crystal growth; crystallization; morphology; crystal structure; phosphates; thermal decomposition; magnesium compounds; struvite structure; struvite; growth from gel; magnesium ammonium phosphates hexahydrate crystal growth; crystallization; morphology; crystal structure; phosphates; thermal decomposition; magnesium compounds; struvite structure; struvite; growth from gel; magnesium ammonium phosphates hexahydrate
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Supplementary material

SciFeed

Share & Cite This Article

MDPI and ACS Style

Prywer, J.; Sieroń, L.; Czylkowska, A. Struvite Grown in Gel, Its Crystal Structure at 90 K and Thermoanalytical Study. Crystals 2019, 9, 89.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Crystals EISSN 2073-4352 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top