Mineral - Gudmundite
Gudmundite
Chemical Properties
Mineral Class
Sulfides and sulfosalts
Toxicity
none
Formula
FeSbS
Unit Cell
a=10,00 b=5,95 c=6,73 β=90° Z=8
Physical Properties
Hardness
5.5 - 6
Streak
black
Density
Very Heavy (>6)
Cleavage
nd
Fracture
nd
Tenacity
Supple
Optical Properties
Color
graygray blacksilver
Birefringence
Luster
Metallic
Transparency
opaque
Pleochroism
Geomineralogical Properties
Crystal System
monoclinic
Point Group
Space Group
Habit
dipyramidal, prismatic, tabular
Formation
hydrothermal
Paragenesis
Twinning
Sternförmige Durchdringungszwillinge nach (101)
Rarity
Rarely
Synonyms
Gudmundite
Composition
Elements
Mass
Fe
26,81
Ni
0,01
Sb
57,32
As
0,20
S
15,48
Schweden
Groups and Members
Arsenopyrit-Gruppe