General Information
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 Chemical Formula: |
KNaCuSi4O10 |
| Composition: |
Molecular Weight = 397.97 gm) |
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| Empirical Formula: |
KNaCuSi4O10 |
| Synonym: |
Lithidionite |
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Classification
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| Dana Class: |
70.1.1.1 (70)Inosilicate Column or Tube Structures |
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(70.1)with columnar silicate units |
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(70.1.1)Dana Group |
| Strunz Class: |
VIII/FX.00-00 VIII - Silicates |
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VIII/FX - Unclassified Strunz Inosilicates |
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VIII/FX.00 - Unknown |
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Crystallography
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| Axial Ratios: |
a:b:c =1.2234:1:0.8701 |
| Cell Dimensions: |
a = 9.8, b = 8.01, c = 6.97, Z = 2; alpha = 114.12ø, beta = 99.52ø, gamma = 105.59ø V = 474.37 Den(Calc)= 2.79 |
| Crystal System: |
Triclinic - Pinacoidal H-M Symbol ( -1) Space Group: P1- |
| X Ray Diffraction: |
By Intensity(I/Io): 3.37(1) 2.409(0.85) 3.22(0.75) |
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Physical Properties
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| Color: |
blue or white. |
| Density: |
2.75 |
| Hardness: |
5-6 - Between Apatite and Orthoclase |
| Luster: |
Vitreous (Glassy) |
| Streak: |
bluish white |
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Optical Properties
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| Optical Data: |
Biaxial (-), a=1.548, b=1.574, , 2V(Meas)=56. |
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Other Information
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
1 -Athena Mineralogy
2 - EUROmin Project
3 - Institute of Experimental Mineralogy (Russian Academy of Sciences)
4 -MinDat.org Location Data
5 -MinMax
6 -École des Mines de Paris
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Pronunciation Guide 
