TerraCollect
Terra
Collect
Minerals
Fossils
Rocks
Localities
Blogs
Log in
Login
Sign in with Google
Loading data...
Minerals - Witherite | TerraCollect
Mineral - Witherite
Witherite
BaCO₃
Chemical Properties
Mineral Class
Carbonates
Toxicity
high
Formula
BaCO₃
Unit Cell
a=5.31 b=8.90 c=6.43 Z=4
Physical Properties
Hardness
3 - 3.5
Streak
white
Density
Heavy (3,5-6)
Optical Properties
Color
white
gray
orange
colorless
Birefringence
0.148
Luster
Vitreous,
Greasy
Transparency
translucent,
transparent
Pleochroism
Geomineralogical Properties
Crystal System
Composition
Elements
Mass
COâ‚‚
22.50
CaO
0.08
SrO
0.68
BaO
77.15
England (Palache et al. 1952)
Groups and Members
Aragonite-Group
Karten-Ebenen
Geologische Karte
Satelliten Karte
Cleavage
Imperfect after {110}, indistinct after {010}
Fracture
uneven
Tenacity
Brittle
orthorhombic
Point Group
orthorhombic-dipyramidal - 2/m 2/m 2/m
Space Group
Pnma (62)
Habit
blocky,
dipyramidal,
spherical,
prismatic,
tabular,
grape-shaped
Formation
Hydrothermal as a vein mineral in medium- to low-temperature lead-zinc ore deposits, formed by precipitation from barium-bearing solutions in the presence of carbonates.
Paragenesis
Twinning
Mimetic contact twins after {110}
Rarity
Rather rare
Synonyms
Witherite
