Title of article
Status of the reference X-ray powder-diffraction patterns for the serpentine minerals In the PDF database-1997
Author/Authors
Wicks، Fred J. نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2000
Pages
-41
From page
42
To page
0
Abstract
The new phase LaCr(NO3)6 .12H2O was synthesized from a nitric acid solution. The symmetry is trigonal with the parameters a= 10.9564(4) A and c= 16.835(1) A [V= 1750.2(2) A^3 space group R - 3]. The thermal decomposition, studied by temperature-dependent X-ray powder diffraction and thermogravimetry, gave successively the cubic phase LaCr(NO3)6. 6H2O [a= 12.301(1) A, space group P2 1 3] and the chromate(V) LaCrO4 The reduction of LaCrO4 to LaCrO3 occurred at a temperature depending on the oxygen pressure in the reaction atmosphere.
Keywords
X-ray diffraction , serpentine group , chrysotile , antigorite , amesite , carlosturanite , polytype , asbestos identification , medical geology , hazardous waste , fibrous materials , lizardite
Journal title
POWDER DIFFRACTION
Serial Year
2000
Journal title
POWDER DIFFRACTION
Record number
15226
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