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Minerals - Ferroberaunite | TerraCollect
Mineral - Ferroberaunite
Ferroberaunite
Fe²⁺Fe³⁺₅(PO₄)₄(OH)₅ · 6H₂O
Chemical Properties
Mineral Class
Phosphates
Toxicity
none
Formula
Fe²⁺Fe³⁺₅(PO₄)₄(OH)₅ · 6H₂O
Unit Cell
a=20,87 b=5,16 c=19,23 β=94° Z=4
Physical Properties
Hardness
3 - 4
Streak
gray
green
green grey
Optical Properties
Color
gray
green
green grey
Birefringence
0,050
Luster
Vitreous,
Pearly
Transparency
translucent,
transparent
Pleochroism
Geomineralogical Properties
Crystal System
Composition
Elements
Mass
P₂O₅
31,26
Al₂O₃
0,01
Fe₂O₃
43,97
FeO
7,91
H₂O
16,86
New Jersey
Groups and Members
Beraunit-Gruppe
Density
Normal (2-3,5)
Cleavage
nd
Fracture
nd
Tenacity
Brittle
monoclinic
Point Group
Space Group
Habit
tufty,
hair-like,
spherical,
acicular,
radial,
prismatic,
radial
Formation
Oxidationszone von Eisen-Lagerstätten, sekundär aus Triphylit im Granitpegmatit
Paragenesis
Twinning
Rarity
Rarely
Synonyms
Ferroberaunite
