Befanamite

Where it forms, where it's found

Type locality: Befanamo pegmatite
Beronono Commune
Anjozorobe District
Analamanga
Madagascar

Physical

Hardness: 1Talc
2Gypsum
3Calcite
4Fluorite
5Apatite
6Orthoclase
7Quartz
8Topaz
9Corundum
10Diamond
Colour: Grayish green
Density: 3.492 g/cm³

Chemical composition

Constituent elements: Mass composition breakdown
Element Atoms At. mass g/mol Mass g/mol Mass share
8OOxygen Oxygen 7 15.999 111.993
43.40%
21ScScandium Scandium 2 44.956 89.912
34.84%
14SiSilicon Silicon 2 28.085 56.170
21.76%
Total 258.075 100.00%
Mass share = atoms × atomic mass ÷ molar mass × 100
From Mindat formula

Mass composition breakdown
Element	Atoms	At. mass g/mol	Mass g/mol	Mass share
8OOxygen	Oxygen	7	15.999	111.993	43.40%
21ScScandium	Scandium	2	44.956	89.912	34.84%
14SiSilicon	Silicon	2	28.085	56.170	21.76%
	Total	258.075	100.00%

Synonyms

Befanamit
Befanamita

Literature, links & citation

Citations

1922Lacroix, Alfred (1922) Minéralogie de Madagascar, Tome I. Géologie-Minéralogie descriptive. Augustin Challamel. 624 pp.
1926Foshag, W.F (1926) New Minerals, New species. American Mineralogist: 11: 137
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     = {Befanamite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/befanamite-601},
  note      = {Accessed 2026-05-11}
}