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200th Anniversary Meeting of the Russian Mineralogical Society
Saint Petersburg, Russia
10-13 October 2017
2017minsoc.ru
http://www.minsoc.ru/2017/
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Crystal structure of natural Cr3+-rich ettringite

RMS-DPI code:  2017-1-67-0
Scientific session:  2. Mineralogical crystallography and crystal chemistry.
Author listing:  Seryotkin Yu.V., Sokol E.V., Kokh S., Murashko M.N.
Principal author:  Seryotkin Yurii Vladimirovich
Language:  Russian
Abstract - Summary 
(short description):
The Cr3+-rich ettringite was found in mineral assemblages of the Maaleh Adumim area (Judean Desert). Single-crystal XRD analysis of one Cr-free and two Cr3+-rich samples and their structure determination and refinement indicate that the Cr-rich crystals (with Cr/(Cr+Al) to 0.3) preserve the symmetry and metrics of ettringite. The CaO bonding network was found out to undergo differentiation with increasing of Cr3+ concentration at octahedral M sites. The compression of Ca2 and expansion of Ca1 polyhedra sub-networks correlates with the degree of Cr3+→Al substitution

Cr3+-Ettringite, bentorite, chromium, crystal structure, morphology
 
RMS-DPI code:  2017-1-67-0
Pages:  120-122
File of proceedings 
(PDF): 
 211 K
Status:  printed
Accepted:  15/09/2017
Published on-line:  06/12/2017
Permanent address of publication:  http://www.minsoc.ru/2017-1-67-0/
Contact author(s):  Seryotkin, Yurii Vladimirovich
 

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