Ungemachite
1/2Luster vitreous Density 2.287 Optical properties uniaxial (−) Refractive index nω = 1.502 nε = 1.449 Birefringence 0.053 References [1]
Ungemachite is a rare mineral (K3Na8Fe(SO4)6(NO3)2 · 6H2O) known from only two locations - a copper deposit in the Atacama Desert (Chile) and in the New Cobar copper–gold deposit, New South Wales (Australia). The formation of Ungemachite requires the presence of nitrate minerals, which requires arid conditions, as well as sulfates. It has been synthesized under laboratory conditions and its properties have been studied.[2] The mineral was described in 1936 and is named after the mineralogist Henri Ungemach.[3][4][5]
References
- ^ "Ungemachite".
- ^ Vargas Jentzsch, Paul; Ciobotă, Valerian; Bolanz, Ralph Michael; Kampe, Bernd; Rösch, Petra; Majzlan, Juraj; Popp, Jürgen (2012). "Raman and infrared spectroscopic study of synthetic ungemachite, K3Na8Fe(SO4)6(NO3)2·6H2O". Journal of Molecular Structure. 1022: 147–152. doi:10.1016/j.molstruc.2012.05.024.
- ^ Warr, Laurence N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. ISSN 0026-461X.
- ^ Groat, Lee A.; Hawthorne, F. C. (1986). "Structure of ungemachite, K3Na8Fe3+) (SO4)6(NO3)2.6H2O, a mixed sulfate-nitrate mineral". American Mineralogist. 71 (5–6): 826–829.
- ^ Peacock, M. A.; Bandy, M. C. (1936). "Ungemachite and clino-ungemachite: new minerals from Chile" (PDF). American Mineralogist. 21 (12): 2.
External links
- Ungemachite Mineral Data
- Mineral information