Where it forms, where it's found
- Geological setting
Alpine fissures in metamorphic rocks + Mn ores (calcite-rhodochrosite veinlets)
- Type locality
- Wanni glacier - Scherbadung area (Monte Cervandone)
- Binn
- Goms
- Valais
- Switzerland
46.3289°, 8.2164°
11recorded occurrences
Safety & handling
Physical
- Transparency
- Translucent
- Colour
- Yellow (in polished sections)
Optical
- Reflectance R%
- (11.19%, 9.05%) 400, (11.45%, 9.44%) 500, (10.8%, 8.81%) 600, (11.23%, 9.08%) 700
Crystallography
- Cell parameters
- a = 6.7646(4) Å · b = 7.2184(9) Å · c = 7.0040(4) Å
- Cell angles
- β = 104.51(1) °
- Ratio a:b:c
- 1 : 1.067 : 1.035
- Morphology
Isometric grains; elongated crystals
- Type-locality form
Minute isometric grains up to 15 μm in size (Ushkatyn-III) and as elongated crystals up to 2 mm in size (Wanni glacier).
- Comment
Space group P21/n (CNMNC Newsletter No. 46).
Chemical composition
Synonyms
- Gaspariet-(La)
- IMA2018-079
- UM1999-05-AsO:REE
- Unnamed (La Arsenate)
In other languages
- German
- Gasparit-(La) · IMA 2018-079
- Italian
- Gasparite- · Gasparite-(La)
Classification
Strunz
10th ed.8.AD.50
- 8Phosphates, Arsenates, VanadatesClass
- 8.APhosphates, etc. without additional anions, without H2ODivision
- 8.ADWith only large cationsGroup
- 8.AD.50Gasparite-(La)Species
Group, growth & confusion
Literature, links & citation
Citations
- 1963Schwarz, H. (1963) The phosphates, arsenates, and vanadates of the rare earths. Zeitschrift für anorganische und allgemeine Chemie: 323: 44-56. (in German)
- 1982Botto, I.L, Baran, E.J (1982) Characterization of the monoclinic rare earth orthoarsenates. Journal of the Less Common Metals, 83 (2). 255-261 doi:10.1016/0022-5088(82)90275-2DOI: 10.1016/0022-5088(82)90275-2
- 1987Pradhan, A. K.; Choudhary, R. N. P. (1987) Dielectric and thermal properties of LaAs04. Journal of Materials Science, 22 (8). 2955-2958 doi:10.1007/bf01086496DOI: 10.1007/bf01086496
- 1999Cabella, R., Lucchetti, G., Marescotti, P. (1999) Occurrence of LREE- and Y-arsenates from a Fe-Mn deposit, Ligurian Briançonnais Domain, Maritime Alps, Italy. Canadian Mineralogist, 37, 961-972
- 2004Kolitsch, Uwe; Holtstam, Dan (2004) Crystal chemistry of REEXO4 compounds (X = P, As, V). II. Review of REEXO4 compounds and their stability fields. European Journal of Mineralogy, 16 (1). 117-126 doi:10.1127/0935-1221/2004/0016-0117DOI: 10.1127/0935-1221/2004/0016-0117
Cite this entry
@misc{mineral2026,
author = {Mineral Index editorial board},
title = {Gasparite-(La) — Mineral Index},
year = {2026},
url = {https://mineralindex.org/minerals/gasparite-la-53197},
note = {Accessed 2026-05-11}
}