Pronunciation Guide 
General Information |
|
 Chemical Formula: |
(Ca,Na)3(Zr,Ti,Y)Si2O7(O,OH,F)2 |
Classification |
|
| Dana Class: |
56.2.4.7 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O |
| (56.2)with cations in [4] and/or >[4] coordination | |
| (56.2.4)Cuspidine - Wohlerite group | |
| Strunz Class: |
VIII/C.11-50 VIII - Silicates |
| VIII/C - Sorosilicates with [Si2O7]6-, with anions unfamiliar to tetraheders [O,OH,F] | |
| VIII/C.11 - Wöhlerite - Lavenite series | |
Crystallography |
|
| Axial Ratios: |
a:b:c =1.0601:1:0.7109 |
| Cell Dimensions: |
a = 10.93, b = 10.31, c = 7.33, Z = 4; alpha = 90.32ø, beta = 109.03ø, gamma = 90.08ø V = 780.85 |
| Crystal System: |
Triclinic - Pinacoidal H-M Symbol ( -1) Space Group: P1- |
| X Ray Diffraction: |
By Intensity(I/Io): 2.87(1) 3(0.9) 3.28(0.45) |
Physical Properties |
|
| Cleavage: |
[110] Distinct, [110] Distinct |
| Color: |
brown, colorless, yellow brown, honey yellow, or light yellow. |
| Density: |
3.267 |
| Diaphaniety: |
Transparent to Translucent |
| Hardness: |
5.5 - Knife Blade |
| Luster: |
Vitreous - Greasy |
| Streak: |
white |
Optical Properties |
|
| Optical Data: |
Biaxial (+), a=1.639, b=1.643, g=1.646, bire=0.0070, 2V(Calc)=80, 2V(Meas)=80. |
Other Information |
|
| References: |
PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
| See Also: |
Links to other databases for Hiortdahlite : 1 -Alkali Nuts 2 -Athena Mineralogy 3 - EUROmin Project 4 -MinDat.org Location Data 5 -MinMax 6 -WWW-MINCRYST 7 -École des Mines de Paris Search for Hiortdahlite using: Visit our Advertisers for Hiortdahlite : Ask about Hiortdahlite here : |
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