Tyuyamunite
Ca(UO₂)₂(VO₄)₂·5-8H₂O
Phosphates
Hardness —
· Orthorhombic
Photo: Michael J Pabst · CC BY 3.0
Villyaellenite
MnMn₂Ca₂(AsO₄)₂(HAsO₄)₂ * 4H₂O
Hydrous arsenate mineral
Properties
- Chemical formula
- MnMn₂Ca₂(AsO₄)₂(HAsO₄)₂ * 4H₂O
- Group
- Phosphates
- Crystal system
- Monoclinic
- 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
- 8.CB.10
- Dana classification
- 39.2.1.3
- IMA status
- Approved mineral and/or valid name (A)
- IMA symbol
- Vy
- Locality
- —
- Type locality
- —
- Discovery year
- —
Etymology
Named after Villy Aellen
Source: Wikidata
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