Pb-Si ordering in sheet-oxychloride minerals: The super-structure of asisite, nominally Pb7SiO8Cl2

Mineralogical Magazine

Volumn 68, Issue 2, 2004, Pages 247-254

  Welch, M D ^a  

^a DEPARTMENT OF LIFE SCIENCES   (United Kingdom)

Author keywords

Asisite; Cation ordering; Electron diffraction; Lead oxychloride; Super structure; X ray diffraction

Indexed keywords

ANISOTROPY; CROSSLINKING; ELECTRON DIFFRACTION; POSITIVE IONS; SAMPLING; SILICON; TRANSMISSION ELECTRON MICROSCOPY;

SUB-CELLS; SUPERSTRUCTURES;

LEAD;

ASISITE; CHLORIDE; CRYSTAL STRUCTURE; LEAD; X-RAY DIFFRACTION;

EID: 3042821821     PISSN: 0026461X     EISSN: None     Source Type: Journal    
DOI: 10.1180/0026461046820185     Document Type: Article

References (16)

1. Armbruster, T. and Gnos, E. (2000) Tetrahedral vacancies and cation ordering in low-temperature Mn-bearing vesuvianites: indication of a hydrogarnet substitution. American Mineralogist, 79, 550-554.
2. 4. Mineralogical Magazine, 67, 15-21.
3. Brown, I.D. and Altermatt, D. (1985) Bond-valence parameters obtained from a systematic search of the inorganic crystal structure database. Acta Crystallographica. B41, 244-247.
4. 4, a complex heteropolyhedral sheet mineral. American Mineralogist, 79, 550-554.
5. Farrugia, L.J. (1999) WinGX suite for small-molecule single-crystal crystallography. Journal of Applied Crystallography, 32, 837-838.
6. 2Cl. Periodico di Mineralogia, 42, 335-45.
7. Grice, J.D. and Dunn, P.J. (2000) Crystal-structure determination of pinalite. American Mineralogist, 85, 806-809.
8. 2X, X = I, Br, Cl. Materials Research Bulletin, 20, 1031-1036.
9. North, A.C.T., Phillips, D.C. and Mathews, F.S. (1968) A semi-empirical method of absorption correction. Acta Crystallographica. A24, 351-359.
10. Rouse, R.C. and Dunn, P.J. (1985) The structure of thorikosite, a naturally occurring member of the bismuth oxyhalide group. Journal of Solid State Chemistry, 57, 389-395.
11. Rouse, R.C., Peacor, D.R., Dunn, P.J.,Criddle, A.J., Stanley, C.J. and Innes, J. (1988) Asisite, a silicon-bearing lead oxychloride from the Kombat mine, South West Africa, Namibia. American Mineralogist, 73, 643-650.
12. Sheldrick, G.M. (1997) SHELXL-97: a program for crystal structure refinement. University of Goettingen, Germany. Release 97-2.
13. 2, a new mineral from Merehead Quarry, Somerset. Mineralogical Magazine, 58, 59-68.
14. Welch, M.D., Schofield, P.F., Cressey, G. and Stanley, C.J. (1996) Cation ordering in lead-molybdenumvanadium oxychlorides. American Mineralogist, 81, 1350-1359.
15. 2O, a new PbO-related sheet mineral: description and crystal structure. American Mineralogist, 85, 1526-1533.
16. 3. The Canadian Mineralogist, 39, 785-795.