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Minerals - Pyrrhotite | TerraCollect
Mineral - Pyrrhotite
Pyrrhotite
FeâSâ
Chemical Properties
Mineral Class
Sulfides and sulfosalts
Toxicity
none
Formula
FeâSâ
Unit Cell
a=6.87 b=11.90 c=22.72 ÎČ=91° Z=64
Physical Properties
Hardness
3.5 - 4.5
Streak
gray
Density
Heavy (3,5-6)
Optical Properties
Color
brown
gray
bronze
Birefringence
Luster
Metallic
Transparency
opaque
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Composition
Elements
Mass
Fe
60.18
S
39.82
South Dakota (Palache et al. 1952)
Groups and Members
Pyrrhotite-Group
Karten-Ebenen
Geologische Karte
Satelliten Karte
Cleavage
Distinct after {0001}
Fracture
conchoidal
Tenacity
Brittle
Point Group
monoclinic-prismatic - 2/m
Space Group
C2/c (15)
Habit
leafy,
prismatic,
pyramidal,
tabular
Formation
(1) Magmatic, resulting from the segregation of a sulfide melt from mafic to ultramafic magmas. (2) Metamorphic and metasomatic, resulting from the thermal transformation of pyrite. (3) In hydrothermal veins under reducing conditions.
Paragenesis
Twinning
Anchor-shaped contact twins after {10
1
2}
Rarity
Common
Synonyms
Pyrrhotite
