General Information:
Chemical Formula:
BaNa2MnTiB2Si6O20
Composition:
(Molecular Weight = 796.25 gm)
Barium 17.25 % Ba
Sodium 5.77 % Na
Titanium 6.01 % Ti
Manganese 6.90 % Mn
Silicon 21.16 % Si
Boron 2.72 % B
Oxygen 40.19 % O
Empirical Formula:
BaNa2Mn2+TiB2Si6O20
Environment:
Pegmatite cutting alkalic syenite.
IMA Status:
Approved IMA 1967
Locality:
Dara-i-pioz massif, Tien Shan, southern Tajikistan.
Name Origin:
Named for the locality.
Physical Properties:
Cleavage:
[0001] Distinct
Color:
pistachio green.
Density:
3.29
Hardness:
6-6.5 - Orthoclase-Pyrite
Luster:
Vitreous (Glassy)
More details...