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Minerals - Childrenite | TerraCollect
Mineral - Childrenite
Childrenite
(FeÂČâș,MnÂČâș)Al[(OH)â|POâ]·HâO
Chemical Properties
Mineral Class
Phosphates
Toxicity
none
Formula
(FeÂČâș,MnÂČâș)Al[(OH)â|POâ]·HâO
Unit Cell
a=10.40 b=13.39 c=6.92 Z=8
Physical Properties
Hardness
5
Streak
white
Density
Normal (2-3,5)
Optical Properties
Color
brown
Birefringence
0.042
Luster
Vitreous,
Resinous
Transparency
translucent,
transparent
Pleochroism
X= Gelb-Braun Y= Rosa Z= Rosa-Farblos
Geomineralogical Properties
Crystal System
orthorhombic
Point Group
Composition
Elements
Mass
PâOâ
29.92
AlâOâ
21.43
FeO
28.56
MnO
3.11
CaO
0.65
NaâO
0.37
HâO
15.80
England (Palache et al. 1952)
Karten-Ebenen
Geologische Karte
Satelliten Karte
Cleavage
Indistinct after {100}
Fracture
uneven
Tenacity
Brittle
orthorhombic-pyramidal - mm2
Space Group
Ccc2 (37)
Habit
prismatic,
pyramidal,
tabular
Formation
Through hydrothermal processes during the late stage of the cooling of granitic lithium-bearing pegmatites, usually through the alteration of primary phosphates under the influence of iron and manganese solutions.
Paragenesis
Twinning
Rarity
Rather rare
Synonyms
Childrenite
