Tag Archives: crystal structures

#144

#144

P31

Example – Stillwellite-Ce, (Ce,La, Ca)SiBO5

Named for Frank Leslie Stillwell (1888-1963), Australian ore mineralogist and the dominant Ce content.

The crystal structure of Stillwellite

Burns P C, Hawthorne F C, MacDonald D J, Ventura G D, Parodi G
The Canadian Mineralogist 31 (1993) 147-152

http://www.webmineral.com/data/Stillwellite-(Ce).shtml

CIF
http://rruff.geo.arizona.edu/AMS/download.php?id=18362.cif&down=cif

Stillwellite_Ce

 

SiO4 tetrahedra (orange)
BO4 tetrahedra (pink)

3D rotatable model of Stillwellite-Ce

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#143

#143

P3

Example – 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

#142

#142

I41/acd

Example – (Sr1.9Ba0.1)IrO4

Structure and magnetic properties of Sr2-xAxIrO4 (A=Ca and Ba)

Shimora, T.; Inaguma, A.; Nakamura, T.; Itoh, M.; Morii, Y.
Physical Review B (1995) 52, 9143-9146

 

CIF
https://www.dropbox.com/s/sn3dca4egfl5jpv/icsd_41616.cif

(Sr1.9Ba0.1)IrO4

 

IrO6 octahedra (olive)
Sr/Ba (blue/green)

3D rotatable model of (Sr1.9Ba0.1)IrO4

#140

#140

I4/mcm

Example – CuAl2

Compounds and pseudo-binary alloys with the CuAl2 (C16)type structure. I. Preparation and X-ray results.

Havinga, E.E.; Damsma, H.; Hokkeling, P.
Journal of the Less-Common Metals (1972) 27, 169-186

CIF
https://www.dropbox.com/s/ly9zduljcr26pcq/icsd_42518.cif

Al2Cu

 

AlCu4 tetragonal pyramids (light blue)

3D rotatable model of CuAl2