Mineral - Barytocalcite
Barytocalcite
Chemical Properties
Mineral Class
Carbonates
Toxicity
none
Formula
BaCa(CO₃)₂
Unit Cell
a=8.09 b=5.23 c=6.54 β=106° Z=2
Physical Properties
Hardness
4
Streak
white
Density
Heavy (3,5-6)
Cleavage
Perfect after {210}, imperfect after {001}
Fracture
conchoidal,
uneven
Tenacity
Brittle
Optical Properties
Color
whitegrayorangeyellowyellow white
Birefringence
0.161
Luster
Vitreous,
Resinous
Transparency
translucent,
transparent,
opaque
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Point Group
monoclinic-prismatic - 2/m
Space Group
P2 1 /m (11)
Habit
leafy, coarse, crusty, spherical, prismatic, tabular
Formation
in hydrothermal ore deposits
Paragenesis
Twinning
Rarity
Rather rare
Synonyms
Barytocalcite
Composition
Elements
Mass
CO₂
29.95
MgO
0.50
CaO
18.75
SrO
1.81
BaO
48.92
Russia (Palache et al. 1952)
Name and first discovery: Named after its chemical composition of barium and calcium carbonate (calcite). First described in 1824
Chemism: Polymorph after alstonite and paralstonite
Synonyms:
Varieties:
Abbreviation: Bcal
Literature
Palache, C., Berman, H., & Frondel, C. (1952). Dana's system of mineralogy. GeologiskaFöreningen i Stockholm Förhandlingar, 74(2), 218-219.