General Information
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 Chemical Formula: |
K2ZrSi3O9 |
| Composition: |
Molecular Weight = 397.67 gm) |
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| Empirical Formula: |
K2ZrSi3O9 |
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Classification
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| Dana Class: |
59.1.1.4 (59)Cyclosilicate Three-Membered Rings |
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(59.1)anhydrous, no other anions |
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(59.1.1)Benitoite group |
| Strunz Class: |
VIII/E.01-40 VIII - Silicates |
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VIII/E - Cyklosilicates, triplet rings [Si3O9]6- |
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VIII/E.01 - Benitoite series |
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Crystallography
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| Axial Ratios: |
a:c = 1:1.47569 |
| Cell Dimensions: |
a = 6.893, c = 10.172, Z = 2; V = 418.56 Den(Calc)= 3.16 |
| Crystal System: |
Hexagonal - Dipyramidal H-M Symbol (6/m) Space Group: P63/m |
| X Ray Diffraction: |
By Intensity(I/Io): 2.85(1) 3.85(0.8) 5.97(0.6) |
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Physical Properties
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| Cleavage: |
None |
| Color: |
colorless, violet, light lilac, or pink. |
| Density: |
3.1 - 3.13, Average = 3.11 |
| Diaphaniety: |
Transparent |
| Hardness: |
5.5-6 - Knife Blade-Orthoclase |
| Luster: |
Adamantine |
| Streak: |
white |
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Optical Properties
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| Optical Data: |
Uniaxial (+), w=1.625, e=1.655, bire=0.0300. |
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Other Information
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| References: |
PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
Links to other data for Wadeite :
1 -Athena Mineralogy
2 - EUROmin Project
3 -MinDat.org Location Data
4 -MinMax
5 -WWW-MINCRYST
6 -École des Mines de Paris
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