Hejtmanite

hejtmanite

arfvedsonite

bastnasite

chevkinite

Images

Formula: Ba₂Mn²⁺₄Ti₂(Si₂O₇)₂O₂(OH)₂F₂
Sorosilicate (Si₂O₇ groups), bafertisite group, barium, manganese and titanium bearing mineral
Crystal System: Triclinic
Specific gravity: 3.97 to 4.06 measured 4.29 calculated
Hardness: 4½
Streak: Yellow, brown
Colour: Brownish to golden yellow
Common impurities: Fe,Nb,K,(Al,Mg,Na,Cl,Sr,Zr)
Environments:

Pegmatites

Localities

At the type locality, Mbolwe Hill, Mkushi River area, Mkushi, Mkushi District, Central Province, Zambia, hejtmanite occurs in arfvedsonite veins in pegmatite cutting alkalic granite and syenite. Associated minerals include manganoan arfvedsonite, albite, bastnäsite, chevkinite, manganoan ilmenite, apatite and aegirine (HOM, AM 77.1306).

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