Photo: Dan Holtstam, Luca Bindi, Hans-Jürgen Förster, Andreas Karlsson and Kjell Gatedal · CC BY-SA 4.0
Carlfrancisite
Mn²⁺₃(Mn²⁺,Mg,Fe³⁺,Al)₄₂(As³⁺O₃)₂(As⁵⁺O₄)₄[(Si,As⁵⁺)O₄]₆[(As⁵⁺,Si)O₄]₂(OH)₄₂
Arsenosilicate mineral
Properties
- Chemical formula
- Mn²⁺₃(Mn²⁺,Mg,Fe³⁺,Al)₄₂(As³⁺O₃)₂(As⁵⁺O₄)₄[(Si,As⁵⁺)O₄]₆[(As⁵⁺,Si)O₄]₂(OH)₄₂
- Group
- Silicates
- Crystal system
- Trigonal
- Hardness (Mohs)
- —
- Color
- —
- Luster
- —
- Streak
- —
- Density
- —
- Cleavage
- —
- Fracture
- —
- Tenacity
- —
- Crystal habit
- —
- Transparency
- —
- Space group
- R-3c
- Fluorescence
- —
- Magnetism
- —
- Radioactivity
- —
- Refractive index
- —
- Optical character
- —
- Birefringence
- —
- Pleochroism
- —
- Strunz classification
- —
- Dana classification
- 43.4.9.3
- IMA status
- Approved mineral and/or valid name (A)
- IMA symbol
- Cfc
- Locality
- 🇳🇦 Kombat
- Type locality
- —
- Discovery year
- —
Etymology
Named after Carl A. Francis
Source: Wikidata
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