#143

#143

P3

Example ā€“ Simpsonite, Ta3Al4O13(OH)

Named for Edward Sydney Simpson (1875-1939), Western Australian government mineralogis and mineral analyst.

The crystal chemistry of Simpsonite

Ercit T S, Cerny P, Hawthorne F C
The Canadian Mineralogist 30 (1992) 663-671

 

http://www.webmineral.com/data/Simpsonite.shtml

CIF
http://rruff.geo.arizona.edu/AMS/download.php?id=05775.cif&down=cif

Simpsonite

 

TaO6 octahedra (brown)
AlO6 octahedra (blue)

3D rotatable model of Simpsonite

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