Crystal structures of sapphirine and surinamite analogues in the MgO-Ga2O3-GeO2 system

European Journal of Mineralogy

Volumn 10, Issue 6, 1998, Pages 1283-1293

  Barbier, Jacques ^a  

^a MCMASTER UNIVERSITY   (Canada)

Author keywords

Cation ordering; Crystal structure; Germanate; MgO Ga2O3 GeO2 system; Polytypism; Sapphirine; Surinamite

Indexed keywords

CRYSTAL CHEMISTRY; GALLIUM COMPOUNDS; GERMANATE MINERALS; GERMANIUM OXIDES; MAGNESIA; OXIDE MINERALS; POSITIVE IONS; SILICATE MINERALS; SILICON;

CATION ORDERING; GERMANATE; POLYTYPISM; SAPPHIRINE; SURINAMITE;

CRYSTAL STRUCTURE;

CRYSTAL STRUCTURE; SAPPHIRINE; SURINAMITE;

EID: 0032465888     PISSN: 09351221     EISSN: None     Source Type: Journal    
DOI: 10.1127/ejm/10/6/1283     Document Type: Article

References (17)

1. Altermatt, D. & Brown, I.D. (1985): Bond-valence parameters from a systematic analysis of the inorganic structure database. Acta Crysl., B41, 244-247.
2. 20, a new synthetic analogue of the mineral sapphirine. Phys. Chem. Minerals, 17, 246-252.
3. 2 systems. Phys. Chem. Minerals, 23, 151-156.
4. th General Meeting of the International Mineralogical Association, Toronto, Canada, August 9-14, 1998.
5. Christy, A.G. (1988): A new 2c superstructure in beryl-Iian sapphirine from Casey Bay, Enderby Land, Antartica. 4m. Mineral., 73, 1134-1137
6. Christy, A.G. & Putnis, A. (1988): Planar and line defects in the sapphirine polytypes. Phys. Chem. Minerals, 15, 548-558.
7. de Roever, E.M.F., Lattard, D., Schreyer, W. (1981): Surinamite: a beryllium-bearing mineral. Contrib. Mineral. Petrol., 76, 472-473.
8. Grew, E.S. (1981): Surinamite, taaffeite and beryllian sapphirine from pegmatites in granulite-facies rocks of Casey Bay, Enderby Land, Antartica. Am. Mineral., 66, 1022-1033.
9. IV ordering in monoclinic sapphirine. Contrib. Mineral. Petrol., 68, 357-368.
10. 2O. Contrib. Mineral. Petrol, 92, 113-127.
11. Liebau, F. (1978): Silicates with branched anions: a crystallo-chemically distinct class. Am. Mineral., 63, 918-923.
12. c. Z. Kristallogr., 151, 91-100.
13. Moore, P.B. (1969): The crystal structure of sapphirine. Am. Mineral., 54, 31-49.
14. 16. Am. Mineral., 68, 804-810.
15. Sheldrick, G.M. (1990): Phase-annealing in SHELX-90, direct methods for larger structures. Acta Cryst., A46, 467-473.
16. - (1993): SHELXL93, program for the refinement of crystal structures. University of Göttingen, Germany.
17. Van Derveer, D.G., Swihart, G.H., Sen Gupta, P.K., Grew. E.S. (1993): Cation occupancies in serendibite: A crystal structure study. Am. Mineral., 78, 195-203.