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A hydrous Ca-bearing magnesium carbonate from playa lake sediments, Salines Lake, Spain

American Mineralogist

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Abstract

Sediments of playa Lake Salines, SE, Spain, contain a carbonate mineral characterized by X-ray diffraction peaks very similar to, but systematically shifted from those of pure magnesite. Analyses (SEM, IR and Raman spectroscopy, DTA, TGA, and ICP) indicate the mineral is a hydrous Ca-bearing magnesium carbonate with the chemical formula (Mg0.92,Ca0.08)CO3??3H2O. Thermal characteristics of the mineral are similar to those of other known hydrated magnesium carbonates. X-ray and electron diffraction data suggests a monoclinic system (P21/n space group) with unit-cell parameters of a = 6.063(6), b = 10.668(5), and c = 6.014(4) A?? and ?? = 107.28??.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
A hydrous Ca-bearing magnesium carbonate from playa lake sediments, Salines Lake, Spain
Series title:
American Mineralogist
Volume
82
Issue:
7-8
Year Published:
1997
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
812
Last page:
819
Number of Pages:
8