General Information
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 Chemical Formula: |
Na3K6Ti2Al2Si8O26Cl3 |
| Composition: |
Molecular Weight = 1,200.31 gm) |
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| Empirical Formula: |
Na3K6Ti2Al2(Si8O26)Cl3 |
| Environment: |
In the interstices of pectolite crystals in a hyperagpaitic pegmatite. |
| IMA Status: |
Approved IMA 1993 |
| Locality: |
TL: In a drill core from the Oleny Stream apatite deposit in the southeastern part of the Khibina alkaline massif, Kola Peninsula, Russia. |
| Name Origin: |
Name for the elements Al, Ti, and Si in the composition. |
| Synonym: |
IMA93.055 |
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Classification
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| Dana Class: |
74.3.3.1 (74)Phyllosilicate Modulated Layers |
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(74.3)with joined strips |
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(74.3.3)Altisite/lemoynite |
| Strunz Class: |
VIII/G.09-05 VIII - Silicates |
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VIII/G - Intermediate between chain- and layered silicates |
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VIII/G.09 - Lemoynite - Loudounite series |
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Crystallography
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| Axial Ratios: |
a:b:c =0.6354:1:0.5612 |
| Cell Dimensions: |
a = 10.37, b = 16.32, c = 9.16, Z = 2; beta = 105.6ø V = 1,493.12 Den(Calc)= 2.67 |
| Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C2/m |
| X Ray Diffraction: |
By Intensity(I/Io): 3.049(1) 2.835(0.84) 8.22(0.71) |
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Physical Properties
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| Cleavage: |
None |
| Color: |
white. |
| Density: |
2.64 - 2.67, Average = 2.65 |
| Diaphaniety: |
Transparent |
| Habits: |
Anhedral Grains - Granular minerals without the expression of crystal shapes, , |
| Hardness: |
6 - Orthoclase |
| Luminescence: |
Non-fluorescent. |
| Luster: |
Vitreous (Glassy) |
| Streak: |
white |
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Optical Properties
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| Optical Data: |
Biaxial (+), a=1.601, b=1.625, g=1.654, bire=0.0530, 2V(Calc)=86, 2V(Meas)=85. Dispersion weak, r < v. |
| Pleochroism (x): |
colorless. |
| Pleochroism (y): |
colorless. |
| Pleochroism (z): |
colorless. |
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Other Information
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| References: |
NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.81,1996) OPTIC PROP.(MinRec) |
| See Also: |
Links to other databases for Altisite :
1 -Athena Mineralogy
2 - EUROmin Project
3 -MinDat.org Location Data
4 -MinMax
5 -WWW-MINCRYST
Search for Altisite using:
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[MSN.COM]
[NORTHERN LIGHT]
[YAHOO]
Visit our Advertisers for Altisite :
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Ask about Altisite here :
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