General Information
|
Chemical Formula: |
K2ZrSi6O15 |
Composition: |
Molecular Weight = 577.92 gm) |
|
|
|
|
|
|
|
|
Empirical Formula: |
K2ZrSi6O15 |
|
Classification
|
Dana Class: |
72.2.1.1 (72)Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings |
|
(72.2)with 4-, 6-, and 8-membered rings |
|
(72.2.1)Dalylite group |
Strunz Class: |
VIII/H.03-20 VIII - Silicates |
|
VIII/H - Phyllosilicates (layered), Tetragonal or pseudotetragonal layered structures [Si4O10]4- and others |
|
VIII/H.03 - Sanbornite series |
|
Crystallography
|
Axial Ratios: |
a:b:c =0.9702:1:0.9055 |
Cell Dimensions: |
a = 7.5, b = 7.73, c = 7, Z = 1; alpha = 106ø, beta = 113.5ø, gamma = 99.5ø V = 352.84 Den(Calc)= 2.72 |
Crystal System: |
Triclinic - Pinacoidal H-M Symbol ( -1) Space Group: P1- |
X Ray Diffraction: |
By Intensity(I/Io): 3.08(1) 3.58(1) 4.2(1) |
|
Physical Properties
|
Cleavage: |
[101] Good, [010] Good, [100] Indistinct |
Color: |
colorless. |
Density: |
2.84 |
Diaphaniety: |
Transparent |
Hardness: |
7.5 - Garnet |
Luster: |
Vitreous (Glassy) |
Streak: |
white |
|
Optical Properties
|
Optical Data: |
Biaxial (-), a=1.575, b=1.59, g=1.601, bire=0.0260, 2V(Calc)=80, 2V(Meas)=72. |
|
Other Information
|
References: |
PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
See Also: |
Links to other data for Dalyite :
1 -Athena Mineralogy
2 - EUROmin Project
3 -MinDat.org Location Data
4 -MinMax
5 -WWW-MINCRYST
6 -École des Mines de Paris
Search for Dalyite using:
[ALTAVISTA]
[All-The-Web]
[EXCITE]
[GO.COM]
[GOOGLE]
[LYCOS]
[LookSmart]
[MAMMA]
[MSN.COM]
[NORTHERN LIGHT]
[YAHOO]
Visit our Advertisers for Dalyite :
The Arkenstone Fine Minerals
John Betts Fine Minerals
Dakota Matrix Minerals
Exceptional Minerals
Fabre Minerals
OsoSoft Minerals
Rare Minerals
Tsumeb Minerals
Dan Weinrich Fine Minerals
|
|
|
|
|