Where it forms, where it's found
- Geological setting
A beryl-columbite subtype LCT granite pegmatite
- Type locality
- Antsakoa I pegmatite
- Bekapaika Commune
- Tsaratanàna District
- Betsiboka
- Madagascar
-16.6353°, 47.4019°
11recorded occurrences
Radioactivity
Physical
- Hardness
- 1Talc
- 2Gypsum
- 3Calcite
- 4Fluorite
- 5Apatite
- 6Orthoclase
- 7Quartz
- 8Topaz
- 9Corundum
- 10Diamond
- Transparency
- Opaque
- Colour
- Black
- Streak
- Brownish black
Crystallography
- Cell parameters
- a = 6.42 Å · c = 4.02 Å
- Type-locality form
Metamict crystals up to 4 cm long and 2 cm thick with a greybrown, brown, yellow or white crust of varying thickness.
- Comment
Spacegroup P-31m for material heated to 650◦ C
Chemical composition
Synonyms
- IMA1975-038
- Petscheckiet
In other languages
- German
- Petscheckit
- Italian
- Petscheckite
Classification
Strunz
10th ed.4.DH.35
- 4OxidesClass
- 4.DMetal: Oxygen = 1:2 and similarDivision
- 4.DHWith large (+- medium-sized) cations; sheets of edge-sharing octahedraGroup
- 4.DH.35PetscheckiteSpecies
Dana
8th ed.08.01.09.02
- 08Multiple Oxides Containing Niobium, Tantalum or TitaniumClass
- 08.01ABO4Type
- 08.01.09— unnamed intermediate level —Group
- 08.01.09.02PetscheckiteSpecies
CIM
—18.3.5
- 18Niobates and TantalatesClass
- 18.3Niobates and tantalates containing U but not rare earthsGroup
- 18.3.5PetscheckiteSpecies
Group, growth & confusion
Literature, links & citation
Citations
- 1978Mücke, Arno, Strunz, Hugo (1978) Petscheckite and liandratite, two new pegmatite minerals from Madagascar. American Mineralogist, 63 (9-10) 941-946
- 2004Tomašić, Nenad, Raade, Gunnar, Bermanec, Vladimir (2004) REE-bearing petscheckite from Tiltvika, Nordland, Norway, and its heating products. Neues Jahrbuch für Mineralogie - Monatshefte, 2004 (4) 163-175 doi:10.1127/0028-3649/2004/2004-0163DOI: 10.1127/0028-3649/2004/2004-0163
- 2005(2005) Petscheckite. Handbook of Mineralogy. Mineralogical Society of America
- 2023Larsen, Knut Edvard (2023) Minerals first described from Madagascar. Norsk Mineralsymposium 2023, 89-122
Cite this entry
@misc{mineral2026,
author = {Mineral Index editorial board},
title = {Petscheckite — Mineral Index},
year = {2026},
url = {https://mineralindex.org/minerals/petscheckite-3179},
note = {Accessed 2026-05-11}
}