The crystal chemistry of rhodizite: a re-examination.

A. Pring, V. K. Din, D. A. Jefferson, J. M. Thomas

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)163-172
Number of pages10
JournalMineralogical Magazine
Issue number353
Publication statusPublished - Mar 1986
Externally publishedYes


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