Tyuyamunite
Ca(UO₂)₂(VO₄)₂·5-8H₂O
Phosphates
Hardness —
· Orthorhombic
Photo: Robert M. Lavinsky · CC BY-SA 3.0
Kidwellite
NaFe³⁺₉₊ₓ(PO₄)₆(OH)₁₁·3H₂O (x ≈ 0.33)
Phosphate mineral
Properties
- Chemical formula
- NaFe³⁺₉₊ₓ(PO₄)₆(OH)₁₁·3H₂O (x ≈ 0.33)
- Group
- Phosphates
- Crystal system
- Monoclinic
- Hardness (Mohs)
- 3
- Color
- White
- Luster
- —
- Streak
- Yellow
- Density
- 3,34 g/cm³
- Cleavage
- —
- Fracture
- —
- Tenacity
- —
- Crystal habit
- —
- Transparency
- —
- Space group
- P2/n
- Fluorescence
- —
- Magnetism
- —
- Radioactivity
- —
- Refractive index
- —
- Optical character
- —
- Birefringence
- —
- Pleochroism
- —
- Strunz classification
- 8.DK.20
- Dana classification
- 42.8.2.1
- IMA status
- Approved mineral and/or valid name (A)
- IMA symbol
- Kdw
- Locality
- 🇺🇸 Fodderstack Mountain
- Type locality
- —
- Discovery year
- —
Etymology
Named after Albert Kidwell
Source: Wikidata
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