Pronunciation Guide 
General Information |
|
 Chemical Formula: |
(Na,Ca,K)8(Si,Al)12O24(SO4,Cl,CO3)3·(H2O) |
| Environment: |
Generally associated with sodalite-group minerals. |
| IMA Status: |
Approved IMA 1968 |
| Locality: |
TL: Sar-e-Sang luzurite deposit in Afghanistan. |
| Name Origin: |
From its locality. |
Classification |
|
| Dana Class: |
76.2.5.1 (76)Tectosilicate Al-Si Framework |
| (76.2)Feldspathoids and related species | |
| (76.2.5)Cancrinite group | |
| Strunz Class: |
VIII/J.09-50 VIII - Silicates |
| VIII/J - Tectosilicates (network) with anions unfamiliar to the tetraheders | |
| VIII/J.09 - Cancrinite group | |
Crystallography |
|
| Axial Ratios: |
a:c = 1:1.67264 |
| Cell Dimensions: |
a = 12.8013, c = 21.412, Z = 4; V = 3,038.76 |
| Crystal System: |
Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: P31c |
| X Ray Diffraction: |
By Intensity(I/Io): 3.298(1) 3.688(1) 4.82(0.8) |
Physical Properties |
|
| Cleavage: |
[???] Perfect |
| Color: |
blue or colorless. |
| Density: |
2.55 - 2.65, Average = 2.59 |
| Diaphaniety: |
Transparent |
| Habits: |
Massive - Uniformly indistinguishable crystals forming large masses., , |
| Hardness: |
5-6 - Between Apatite and Orthoclase |
| Luster: |
Vitreous (Glassy) |
| Streak: |
white |
Optical Properties |
|
| Optical Data: |
Uniaxial (+), w=1.523, e=1.529, bire=0.0060. |
Other Information |
|
| References: |
NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
Links to other databases for Afghanite : 1 -Athena Mineralogy 2 - EUROmin Project 3 -International Zeolite Association 4 -MinDat.org Location Data 5 -MinMax 6 -WWW-MINCRYST 7 -Zeolite Database by Bruno Herreros 8 -École des Mines de Paris Search for Afghanite using: Visit our Advertisers for Afghanite : Ask about Afghanite here : |
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