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Apjohnite

Apjohnite
Apjohnite (white) found with ilesite
General
CategoryMineral
Formula
(repeating unit)
Mn2+Al2(SO4)4·22H2O
IMA symbolAPI
Identification
ColorColourless, white, light pink, light yellow, light green
Mohs scale hardness1.5-2
LusterSilky
StreakWhite
DiaphaneityTransparent, Translucent
Specific gravity1.78 - 1.81
Density1.78 - 1.81 g/cm3 (Measured)
1.836 g/cm3 (Calculated)

Apjohnite (IMA symbol: Apj[1]) is a manganese aluminium sulfate mineral with the chemical formula Mn2+Al2(SO4)4·22H2O. It was named after Trinity College Dublin professor James Apjohn. Its type locality is Maputo Province, Mozambique.[2]

References

  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. ^ Apjohnite Archived 2019-03-26 at the Wayback Machine on mindat.org

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