TY - JOUR
T1 - The crystal chemistry of rhodizite
T2 - a re-examination.
AU - Pring, A.
AU - Din, V. K.
AU - Jefferson, D. A.
AU - Thomas, J. M.
PY - 1986/3
Y1 - 1986/3
N2 - Chemical analysis of rhodizite from Ambatofinandrahana, in the Ankarata Mts, Madagascar, gave the formula: (K0.46Cs0.36Rb0.06Na0.02)Al3.99Be4(B11.35Be0.55Li0.02)O28. High-resolution EM showed that the distribution of alkali cations is truly random; the distribution of B and Be was monitored by magic angle spinning NMR which showed that these atoms are located in chemically equivalent sites. The structure was refined by single-crystal XRD; it is cubic, a 7.318 A, space group P43m; the basic structure as determined by Taxer & Buerger (M.A. 19-269) is confirmed - 4 Be occupy a 4e special position, the remaining 0.5 being randomly distributed with the 11.35 B atoms over the 12 h sites.-R.A.H.
AB - Chemical analysis of rhodizite from Ambatofinandrahana, in the Ankarata Mts, Madagascar, gave the formula: (K0.46Cs0.36Rb0.06Na0.02)Al3.99Be4(B11.35Be0.55Li0.02)O28. High-resolution EM showed that the distribution of alkali cations is truly random; the distribution of B and Be was monitored by magic angle spinning NMR which showed that these atoms are located in chemically equivalent sites. The structure was refined by single-crystal XRD; it is cubic, a 7.318 A, space group P43m; the basic structure as determined by Taxer & Buerger (M.A. 19-269) is confirmed - 4 Be occupy a 4e special position, the remaining 0.5 being randomly distributed with the 11.35 B atoms over the 12 h sites.-R.A.H.
UR - http://www.scopus.com/inward/record.url?scp=0022439718&partnerID=8YFLogxK
U2 - 10.1180/minmag.1986.050.355.22
DO - 10.1180/minmag.1986.050.355.22
M3 - Article
AN - SCOPUS:0022439718
SN - 0026-461X
VL - 50
SP - 163
EP - 172
JO - Mineralogical Magazine
JF - Mineralogical Magazine
IS - 353
ER -