TerraCollect
Terra
Collect
Minerals
Fossils
Rocks
Localities
Blogs
Log in
Login
Sign in with Google
Loading data...
Minerals - Howieite | TerraCollect
Mineral - Howieite
Howieite
Na(Fe,Mn)₁₀(Fe,Al)₂Si₁₂O₃₁(OH)₁₃
Chemical Properties
Mineral Class
Silicates
Toxicity
none
Formula
Na(Fe,Mn)₁₀(Fe,Al)₂Si₁₂O₃₁(OH)₁₃
Unit Cell
Physical Properties
Hardness
5 - 7
Streak
gray
Density
Normal (2-3,5)
Optical Properties
Color
black
gray
Birefringence
Luster
Vitreous,
Metallic
Transparency
Pleochroism
Geomineralogical Properties
Crystal System
triclinic
Point Group
Cleavage
Fracture
Tenacity
Space Group
Habit
acicular,
prismatic,
tabular
Formation
Metamorphose
Paragenesis
Twinning
Rarity
Very rare
Synonyms
Howieite
