Molecular structure of the arsenate mineral chongite from Jáchymov - a vibrational spectroscopy study

0540599 - FZÚ 2021 RIV CZ eng J - Journal Article
Sejkora, J. - Plášil, Jakub - Čejka, J. - Dolníček, Z. - Pavlíček, R.
Molecular structure of the arsenate mineral chongite from Jáchymov - a vibrational spectroscopy study.
Journal of Geosciences. Roč. 65, č. 2 (2020), s. 111-120. ISSN 1802-6222. E-ISSN 1803-1943
R&D Projects: GA ČR GA17-09161S
Institutional support: RVO:68378271
Keywords : chongite * Hureaulite group * unit-cell parameters * chemical composition * Raman and infrared spectroscopy * Jachymov ore district
OECD category: Mineralogy
Impact factor: 1.525, year: 2020
Method of publishing: Open access
https://doi.org/10.3190/jgeosci.292

We have undertaken a study of the arsenate mineral chongite from the second world occurrence, which is Jáchymov (Czech Republic). Chongite occurs as colourless to white crystalline spherical and hemispherical aggregates up to 0.3 mm across composed of rich crusts on strongly weathered fragments of rocks and gangue. The chemical composition of chongite agrees well with the general stoichiometry of the hureaulite group of minerals and corresponds to the following empirical formula: Ca1.00(Mg1.24Ca0.69 0.06Mn0.01)Σ2.00Ca2.00[(AsO3OH)2.13(AsO4)1.84(PO4)0.03]Σ4.00·4H2O. In this work the mineral's structure and its properties were studied and the results are presented.

Permanent Link: http://hdl.handle.net/11104/0318222