General Information:
Chemical Formula:BaCa(CO3)2
Composition:(Molecular Weight = 297.42 gm)Barium 46.17 %
BaCalcium 13.48 %
CaCarbon 8.08 %
C Oxygen 32.28 %
O Empirical Formula: BaCa(CO3)2
Environment:Low-temperature hydrothermal deposits. See other trimorphs paralstonite and barytocalcite.
Locality:Brownley Hill lead mine, Alston, Cumberland and Fallowfield lead mine hear Hexham, Northcumberland, England.
Name Origin:Named after the locality.
Physical Properties: Cleavage:[110] Imperfect
Color:colorless, gray, white, or pink.
Density:3.69 - 3.71, Average = 3.7
Diaphaniety:Transparent to translucent
Habits:Euhedral Crystals - Occurs as well-formed crystals showing good external form., Pseudo Hexagonal - Crystals show a hexagonal outline.,
Hardness:4-4.5 - Between Fluorite and Apatite
Luminescence:Fluorescent, Long UV=weak yellow.
Luster:Vitreous (Glassy)
Streak:white
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