Mineral - Sveinbergeite
Sveinbergeite
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
Ca(Fe²⁺₆Fe³⁺)Ti₂(Si₄O₁₂)₂O₂(OH)₅(H₂O)₄
Unit Cell
a=5,33 b=11,80 c=11,82 α=101° β=98° γ=102° Z=2
Physical Properties
Hardness
3
Streak
whitegreengreen white
Density
Normal (2-3,5)
Cleavage
Vollkommen auf (001)
Fracture
uneven
Tenacity
Brittle
Optical Properties
Color
blackbrowngreen
Birefringence
0,008
Luster
Vitreous,
Pearly
Transparency
translucent,
opaque
Pleochroism
Geomineralogical Properties
Crystal System
triclinic
Point Group
Space Group
Habit
prismatic, prismatic
Formation
Magmatisch, in Syenit-Pegmatiten
Paragenesis
Twinning
Rarity
Rare
Synonyms
Sveinbergeite
Composition
Elements
Mass
Nb₂O₅
0,55
TiO₂
10,76
ZrO₂
0,48
SiO₂
34,41
Al₂O₃
0,34
Fe₂O₃
5,57
FeO
29,39
MnO
1,27
CaO
3,87
MgO
0,52
K₂O
0,49
Na₂O
0,27
F
0,24
H₂O
8,15
Norwegen
Groups and Members
Astrophyllit-Supergruppe
Devitoit-Gruppe
Name and first discovery : Named after the Norwegian amateur mineralogist and collector Svein Arne Berge (1949-), who found the first pieces in 1987 and recognized their potential as a new mineral.
Chemistry :
Synonyms :
Varieties :