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Distribution of Cations and the Proton Location in Kaersutite

✍ Scribed by Z. Jirák; Dr. F. Pechar; S. Vratislav

Publisher: John Wiley and Sons
Year: 1986
Tongue: English
Weight: 162 KB
Volume: 21
Category: Article
ISSN: 0232-1300
DOI: 10.1002/crat.2170211207

No coin nor oath required. For personal study only.

✦ Synopsis

FyzikAlni dslav CSAV, Praha, and dstav gcologie a geotcchniky fSAT, Praha, and Fakulta jadernti a fyziktilne -Intcn5.rskk CVUT, Praha

Distribution of Cations and the Proton Location in Kaersutite

The crysta1 Of Kaersutite, (Na0.83K0.37ca1.BB) OH),, from lecality VlEi Hora -Bohemia was studied by powder neutron diffraction.

The refinement of the crystal structure within space group C2/m gave cell dimensions a = 0.9863, b = 1.8040 and c = 0.5306 nm, B = 105" 28', 2 = 2. Protons were found to form bridges between two 03 ioxygens. (This location allows for the existence of proton per f.u. in maximum). The actual population was refined to 0.8. The occupation of thc five cation sites was determined as follows: M 1 (0.60 Mg + 0.25 Ti + 0.10 Al + 0.05 Fe), M 2 (0.50 Mg + 0.35 Fe + 0.15 AI), M 3 (0.8 Mg + p.2 Fe), M 4 (Ca) and A (Na, K).

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