Where it forms, where it's found
- Type locality
- Jáchymov
- Karlovy Vary District
- Karlovy Vary Region
- Czech Republic
50.3661°, 12.9233°
7recorded occurrences
Radioactivity
Physical
- Colour
- Yellow · greyish · brown · green
Optical
- Optical type
- Biaxial (-)
- Refractive index
- 1.72 – 1.76
- Surface relief
- High
- Principal indices
- nα 1.72 · nβ 1.76 · nγ 1.76
- Pleochroism
- Not Visible
- Dispersion
- r < v moderate
- UV response
- Yellowish green (UV).
Δ = 0Δmax
PPLpleochroism per grain
XPLindependent extinctions · rotate the stage
PPLpleochroism only · colour blends on rotation
XPLinterference colour · extinct every 90°
Retardation400 nm
Order1st order
XPL colour
Crystallography
- Morphology
Crystals occurs as needles and laths.
- Comment
Crystal structure unknown.
Chemical composition
Synonyms
- Beta-uranopilite
- Meta-uranopilit
- Metauranopiliet
- β-uranopilite
In other languages
- German
- Metauranopilit
- Italian
- Meta-uranopilite · Metauranopilite
Classification
Strunz
10th ed.7.EA.05
- 7SulfatesClass
- 7.EUranyl sulfatesDivision
- 7.EAWithout cationsGroup
- 7.EA.05MetauranopiliteSpecies
Dana
8th ed.31.02.07.01
- 31Hydrated Sulfates Containing Hydroxyl or HalogenClass
- 31.02(AB)6(XO4)Zq·xH2OType
- 31.02.07— unnamed intermediate level —Group
- 31.02.07.01MetauranopiliteSpecies
CIM
—25.8.8
- 25SulphatesClass
- 25.8Sulphates of Sb, V, Cr and UGroup
- 25.8.8MetauranopiliteSpecies
Group, growth & confusion
Literature, links & citation
Citations
- 1935Nováček (1935) Soc. sc. Bohême, Mém., no. 7.
- 1942Nováček (1942) Vĕst. Král. ČeskéSpol. Nauk, no. 17.
- 1951Palache, Charles; Berman, Harry; Frondel, Clifford (1951) The System of Mineralogy (7th ed.) Vol. 2 - Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons.
- 1952Frondel, Clifford (1952) Studies of uranium minerals (X): Uranopilite. American Mineralogist, 37 (11-12) 950-959
- 2005(2005) Metauranopilite. Handbook of Mineralogy. Mineralogical Society of America
Cite this entry
@misc{mineral2026,
author = {Mineral Index editorial board},
title = {Metauranopilite — Mineral Index},
year = {2026},
url = {https://mineralindex.org/minerals/metauranopilite-2666},
note = {Accessed 2026-05-11}
}