Batisite

batisite

arfvedsonite

lorenzenite

uranothorite

Images

Formula: Na2BaTi2O2(Si2O6)2
Valence: Na2BaTi4+2(Si4O12)O2
Inosilicate (chain silicate), single chains, batisite group, barium- and titanium- bearing mineral
Crystal System: Orthorhombic
Specific gravity: 3.432 measured, 3.49 calculated
Hardness: 5½ to 6
Streak: Rose-brown
Colour: Dark brown
Solubility: Insoluble in hydrochloric, nitric and sulphuric acids
Electrical: Some samples are piezoelectric
Thermal Behaviour: At 1000°C, batisite decomposes with the formation of fresnoite
Common impurities: Zr,Al,Fe,Nb,Mn,Mg,Ca,Sr
Environments

Plutonic igneous environments
Pegmatites

Localities

At the type locality, the Inagli chrome diopside deposit, Inagli Massif, Aldan, Sakha, Russia, batisite occurs in aegirine - arfvedsonite - microcline pegmatites in dunites. Associated minerals include microcline, nepheline, aegirine, arfvedsonite, lorenzenite, uranothorite, eudialyte, apatite and orthoclase (HOM).
Batisite from the Inagli chrome diopside deposit - Image

Back to Minerals