General Information
|
Chemical Formula: |
KBa(Al,Sc)(Mg,Fe++)6Si6O20F2 |
IMA Status: |
Approved IMA 1965 |
| |
Classification
|
Dana Class: |
69.2.1c.1 (69)Chains with Side Branches or Loops (69.2)with P>2 (69.2.1c)Aenigmatite and related species (Magbasite subgroup) |
Strunz Class: |
VIII/C.32-10 - Silicates [Sorosilicates with [Si3O10]8- groups (Magbasite series).] |
| |
Crystallography
|
Crystal System: |
Unknown |
X Ray Diffraction: |
By Intensity(I/Io): 3.2(1) 3.63(1) 2.59(0.8) |
| |
Physical Properties
|
Color: |
colorless or pink violet. |
Density: |
3.41 |
Diaphaniety: |
Transparent |
Hardness: |
5 - Apatite |
Luster: |
Vitreous (Glassy) |
Streak: |
white |
| |
Optical Properties
|
Optical Data: |
Biaxial (-), a=1.597, b=1.609, g=1.615, bire=0.0180, 2V(Calc)=70, 2V(Meas)=70. |
| |
Other Information
|
References: |
PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
See Also: |
Athena Mineralogy |
|
Frederic Biret |
|
Google |
|
MinMax |
|
École des Mines de Paris |
| |
|
|
| |