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12 pages, 1850 KiB  
Article
Biogenic Orthorhombic α-Calcium Formate from Sediments of Alkali Lake, Oregon, USA
by Nikita V. Chukanov, Cesar Menor-Salvan, Vladislav V. Gurzhiy, Alina R. Izatulina, Igor V. Pekov, Marina F. Vigasina, Dmitry A. Ksenofontov and Sergey N. Britvin
Minerals 2021, 11(5), 448; https://doi.org/10.3390/min11050448 - 23 Apr 2021
Cited by 6 | Viewed by 3853
Abstract
Centimeter-sized crystals of orthorhombic calcium formate, α-Ca(HCO2)2 from Alkali Lake, Oregon, USA have been studied by means of powder and single-crystal X-ray diffraction analysis, infrared, and Raman spectroscopy. Based on the data on carbon isotope abundance in calcium formate and [...] Read more.
Centimeter-sized crystals of orthorhombic calcium formate, α-Ca(HCO2)2 from Alkali Lake, Oregon, USA have been studied by means of powder and single-crystal X-ray diffraction analysis, infrared, and Raman spectroscopy. Based on the data on carbon isotope abundance in calcium formate and associated minerals, it was concluded that the formation of α-Ca(HCO2)2 may be a result of a combination of two factors: lake microbial metabolism and anthropogenic pollution with Agent Orange. Possible causes of stability of the low-density tetragonal β-Ca(HCO2)2 polymorph (formicaite) in boron ores are discussed. Full article
(This article belongs to the Special Issue 10th Anniversary of Minerals: Frontiers of Mineral Science)
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