Shortite

General
Category| Carbonate minerals
Formula
(repeating unit)| Na2Ca2(CO3)3
Strunz classification| 5.AC.25
Crystal system| Orthorhombic
Crystal class| Pyramidal (mm2)
H-M symbol: (mm2)
Space group| Amm2
Identification
Colour| Colourless, light yellow, light green
Cleavage| Distinct/good on {010}
Fracture| Conchoidal
Mohs scale hardness| 3
Vitreous|re|er}}| Vitreous
Diaphaneity| Transparent
Specific gravity| 2.6
Density| 2.6
Optical properties| Biaxial (−)
Refractive index| nα = 1.531 nβ = 1.555 nγ = 1.570
Birefringence| 0.039
Dispersion| r < v moderate

Shortite is a sodium-calcium carbonate mineral, with the chemical formula Na2Ca2(CO3)3. It was discovered by J. J. Fahey in well cuttings from the Green River Formation, Sweetwater County, Wyoming, US, and was named to honor Maxwell N. Short (1889–1952), Professor of Mineralogy, University of Arizona.

Shortite is associated with commercial trona ores, and some care must be taken when beneficiating crude trona to avoid contamination with shortite.[2]

## See also

* Aragonite
* Calcite
* Nahcolite
* Natron
* Sodium sesquicarbonate
* Thermonatrite
* Trona
* Vaterite

## References

1. ↑ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine 85 (3): 291–320. doi:10.1180/mgm.2021.43. Bibcode: 2021MinM...85..291W.
2. ↑ McKetta, John J. (1995) "Slurry Systems, Instrumentation to Solid–Liquid Separation", Encyclopedia of Chemical Processing and Design, ISBN 0-8247-2602-2

* Mindata, with localities
* Shortite data

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