Townendite

Na₈ZrSi₆O₁₈

Cyclosilicate mineral

Properties

Chemical formula
Na₈ZrSi₆O₁₈
Group
Silicates
Crystal system
Trigonal
Hardness (Mohs)
Color
Luster
Streak
Density
Cleavage
Fracture
Tenacity
Crystal habit
Transparency
Space group
Fluorescence
Magnetism
Radioactivity
Refractive index
Optical character
Birefringence
Pleochroism
Strunz classification
Dana classification
IMA status
Approved mineral and/or valid name (A)
IMA symbol
Twn
Locality
🇬🇱 Kvanefjeld
Type locality
Discovery year

Etymology

Named after Roger Townend

Source: Wikidata

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