Where it forms, where it's found
- Type locality
- Wilhelm Mine
- Nentershausen
- Hersfeld-Rotenburg
- Kassel Region
- Hesse
- Germany
50.9963°, 9.9517°
56recorded occurrences
Safety & handling
Physical
Optical
- Optical type
- Biaxial (-) · 2V measured = 10 – 15° · 2V calc = 20°
- Refractive index
- 1.64 – 1.694
- Surface relief
- High
- Principal indices
- nα 1.64 · nβ 1.692 · nγ 1.694
- Dispersion
- relatively weak
Δ = 0Δmax
PPLpleochroism per grain
XPLindependent extinctions · rotate the stage
PPLpleochroism only · colour blends on rotation
XPLinterference colour · extinct every 90°
Retardation540 nm
Order1st order
XPL colour
Crystallography
- Space group
- C2/m
- Cell parameters
- a = 14.08 Å · b = 14.21 Å · c = 13.49 Å
- Cell angles
- β = 101.06 °
- Ratio a:b:c
- 1 : 1.009 : 0.958
- Z
- 4
Crystal structure
Chemical composition
Synonyms
- IMA1982-019
- Richelsdorfiet
In other languages
- German
- IMA1982-019 · Richelsdorfit
- Italian
- Richelsdorfite
Classification
Strunz
10th ed.8.DK
- 8Phosphates, Arsenates, VanadatesClass
- 8.DPhosphates, etc. with additional anions, with H2ODivision
- 8.DKWith large and medium-sized cations, (OH, etc.):RO4 > 1:1 and < 2:1Group
- 8.DKRichelsdorfiteSpecies
Dana
8th ed.42.07.15.01
- 42Hydrated Phosphates, Etc.containing Hydroxyl or HalogenClass
- 42.07(AB)2(XO4)Zq·xH2OType
- 42.07.15Richelsdorfite GroupGroup
- 42.07.15.01RichelsdorfiteSpecies
CIM
—22.2.6
- 22Phosphates, Arsenates or Vanadates with other AnionsClass
- 22.2Phosphates, arsenates or vanadates with chlorideGroup
- 22.2.6RichelsdorfiteSpecies
Literature, links & citation
Citations
- 1983Süsse, P., Schnorrer-Köhler, G. (1983) Richelsdorfit, Ca2Cu5Sb[Cl(OH)6(AsO4)4]•6H2O, ein neues Mineral [Richelsdorfite, Ca2Cu5Sb[Cl(OH)6(AsO4)4]•6H2O, a new mineral]. Neues Jahrbuch für Mineralogie - Monatshefte, 1983. 145-150
- 1984Dunn, Pete J., Grice, Joel D. Fleischer, Michael, Pabst, Adolf (1984) New mineral names. American Mineralogist, 69 (1-2) 210-215
- 1987Süsse, Peter, Tillmann, Bruno (1987) The crystal structure of the new mineral richelsdorfite, Ca2Cu5Sb(Cl/(OH)6/(AsO4)4)·6H2O. Zeitschrift für Kristallographie - Crystalline Materials, 179 (1) 323-334 doi:10.1524/zkri.1987.179.1-4.323 DOI: 10.1524/zkri.1987.179.1-4.323
- 1994Sarp, H., Dominik, B., Chiappero, P.-J. (1994) Nouveau gisement (Triembach-Le Val, Vosges, France): nouvelles propriétés optiques et diagramme de poudre de la richelsdorfite, Ca2Cu5Sb[Cl(OH)6(AsO4)4]•6H2O. Schweizerische mineralogische und petrographische Mitteilungen 74: 273-277. (in French)
- 1995Jambor, John L., Pertsev, Nikolai N., Roberts, Andrew C. (1995) New Mineral Names. American Mineralogist, 80 (7-8). 845-850
Cite this entry
@misc{mineral2026,
author = {Mineral Index editorial board},
title = {Richelsdorfite — Mineral Index},
year = {2026},
url = {https://mineralindex.org/minerals/richelsdorfite-3414},
note = {Accessed 2026-05-11}
}