Arcanite information

Arcanite
Arcanite
	Arcanite
General
Category	Sulfate mineral
Formula; (repeating unit)	K2SO4
IMA symbol	Acn
Strunz classification	7.AD.05
Crystal system	Orthorhombic
Crystal class	Dipyramidal (mmm) ; H-M symbol: (2/m 2/m 2/m)
Space group	Pmcn
Unit cell	a = 5.77, b = 10.07 ; c = 7.48 [Å]; Z = 4
Identification
Color	White to colorless, yellow
Crystal habit	Tabular crystals, typically in crusts and coatings
Twinning	Cyclic on {110}
Cleavage	Good on {010} and {001}
Mohs scale hardness	2
Luster	Vitreous
Streak	White
Diaphaneity	Transparent to translucent
Specific gravity	2.66
Optical properties	Biaxial (+)
Refractive index	nα = 1.494 nβ = 1.495 nγ = 1.497
Birefringence	δ = 0.004
2V angle	Measured: 67°
References

Arcanite is a potassium sulfate mineral with formula K₂SO₄.

Arcanite was first described in 1845 for an occurrence in old pine railroad ties in the Santa Ana tin mine, Trabuco Canyon, Santa Ana Mountains, Orange County, California, US.^[2]^[4] It has also been reported from hydrothermal deposits in the Cesano geothermal field, Latium, Italy; in bat guano on the Chincha Islands of Peru; and in caves in Western Australia, South Africa and Namibia.^[4]

^ 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.
^ ^a ^b Mindat.org
^ Webmineral data
^ ^a ^b ^c Handbook of Mineralogy

[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.

[Mindat-2] Mindat.org

[Webmin-3] Webmineral data

[HBM-4] Handbook of Mineralogy

Arcanite information

and 9 Related for: Arcanite information

Arcanite

Potassium sulfate

List of minerals

List of mineral symbols

Sulfate mineral

Syngenite

Wulffite

Leonite

Colimaite