Leucophanite

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Leucophanite
Leucophanite, Aegirine-175723.jpg
The leucophanite on an aegirine needle (about 4-5 mm on edge)
General
CategoryInosilicates
Formula
(repeating unit)
(Na,Ca)2BeSi2(O.OH.F)7
IMA symbolLph[1]
Strunz classification9.DH.05
Crystal systemOrthorhombic
Crystal classDisphenoidal (222)
(same H-M symbol)
Space groupP212121
Identification
References[2][3][4][5][6]

Leucophanite is an inosilicate mineral with the chemical formula (Na,Ca)2BeSi2(O.OH.F)7. It may contain cerium substituting in the calcium position.

It occurs in pegmatites and alkali igneous complexes as yellow, greenish or white triclinic crystals and has been found in Norway, Quebec and Russia.

It was first described from the Langesundfiord district of southern Norway in 1840. The name is from the Greek leucos for "white" and phanein for "to appear" in allusion to the common white color.

References[edit]

  1. ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  2. ^ Mineralienatlas
  3. ^ Mindat
  4. ^ Webmineral data
  5. ^ Mineral data publishing - PDF
  6. ^ Mineral galleries Archived 2006-09-07 at the Wayback Machine