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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F20%3A10135103" target="_blank" >RIV/00023272:_____/20:10135103 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/20:00540599

Result on the web

<a href="http://www.jgeosci.org/content/jgeosci.292_Sejkora.pdf" target="_blank" >http://www.jgeosci.org/content/jgeosci.292_Sejkora.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3190/jgeosci.292" target="_blank" >10.3190/jgeosci.292</a>

Result language

angličtina

Original language name

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

Original language description

Chongite occurs at its second world occurrence Jáchymov 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 corresponds to the following empirical formula: Ca1.00(Mg1.24Ca0.69EUR0.06Mn0.01)Σ2.00Ca2.00[(AsO3OH)2.13(AsO4)1.84(PO4)0.03]Σ4.00.4H2O. Chongite is monoclinic, space group C2/c, with the unit-cell parameters: a 18.618(5), b 9.421(2), c 9.988(2) Å, β 96.86(2)o and V 1739.4(7) Å3. Raman bands at 3456, 3400, 3194 cm-1 and infrared bands at 3450, 3348, 3201 and 3071 cm-1 are assigned to the n OH stretching of water molecules. Raman bands at 2887, 2416 cm-1 and infrared bands at 2904, 2783 cm-1 are connected to n OH stretching in hydrogen bonded (AsO3OH)2- units. Raman bands at 1656, 1578 cm-1 and infrared bands at 1652, 1601 cm-1 are assigned to the n2 (d) H2O bending vibrations of water molecules bonded in the structure by H-bonds of various strength. A Raman band at 1284 cm-1 and infrared bands at 1091 and 1061 cm-1 may be connected to the d As-OH bending vibrations. The most prominent Raman bands at 902, 861, 828, 807, 758 cm-1 and infrared bands at 932, 899, 863, 815, 746 cm-1 are attributed to overlapping n1 (AsO4)3- symmetric stretching, n3 (AsO4)3- antisymmetric stretching, n1 (AsO3OH)2- symmetric stretching, and n3 (AsO3OH)2- antisymmetric stretching vibrations. Raman band at 693 cm-1 and infrared bands at 721, 634 cm-1 are assigned to d AsOH bend and molecular water libration modes. Raman bands 506, 469, 451, 436 cm-1 and infrared bands at 503, 466 and 417 cm-1 are connected with the n4 (d) (AsO4)3- and (HOAsO3)2- bending vibrations. Raman bands at 389, 360, 346 and 302 cm-1 are related to the n2 (d) (AsO4)3- and (HOAsO3)2- bending vibrations. Raman bands at 275 and 238 cm-1 are assigned to the n (OHxxxO) stretching vibrations and those at 190, 162, 110, 100 and 75 cm-1 to lattice modes.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10504 - Mineralogy

Project

<a href="/en/project/GA17-09161S" target="_blank" >GA17-09161S: Crystal structures, chemistry and stability of arsenate and sulfate minerals</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Geosciences

ISSN

1802-6222

e-ISSN

—

Volume of the periodical

65

Issue of the periodical within the volume

2

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

10

Pages from-to

111-120

UT code for WoS article

000548935800003

EID of the result in the Scopus database

—