Important Update News
The RRUFF Project is being updated to improve its interface and content. The beta version of the update is accessible to the public at RRUFF.net. New data is only being added to the beta site. Please note that it is in development, and some components are not functional. Existing RRUFF.info links will resolve to the new site after RRUFF.net is officially released.
We are grateful to NASA for the funding of this effort.
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Name: Polyhalite RRUFF ID: R070209 Ideal Chemistry: K2Ca2Mg(SO4)4·2H2O Locality: West Texas, Texas, USA Source: Michael Scott S105883 [view label] Owner: RRUFF Description: Colorless to brick red massive Status: The identification of this mineral has been confirmed by X-ray diffraction. |
CHEMISTRY | ||||||
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RAMAN SPECTRUM | ||||||||||||
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BROAD SCAN WITH SPECTRAL ARTIFACTS | ||||||||||||
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INFRARED SPECTRUM (Attenuated Total Reflectance) | |||||||||||||||
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POWDER DIFFRACTION | ||||||||
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RRUFF ID: | R070209.1 | |||||||
Sample Description: | Powder | |||||||
Cell Refinement Output: |
a: 6.9577(4)Å b: 6.9578(3)Å c: 8.8894(5)Å alpha: 104.077(4)° beta: 101.209(5)° gamma: 113.914(4)° Volume: 360.15(3)Å3 Crystal System: triclinic |
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REFERENCES for Polyhalite | |
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American Mineralogist Crystal Structure Database Record: [view record] |
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Anthony J W, Bideaux R A, Bladh K W, and Nichols M C (1990) Handbook of Mineralogy, Mineral Data Publishing, Tucson Arizona, USA, by permission of the Mineralogical Society of America. [view file] |
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Sowerby J (1817) Polyhalite, in Exotic Mineralogy or, Coloured Figures of Foreign Minerals as a Supplement to British Mineralogy, Volume 2 Arding and Merrett London 101-102 [view file] |
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Stromeyer F (1817) Ein neu entdecktes Metall und Analyse eines neuen Minerals, Journal für Chemie und Physik, 21, 297-306 [view file] |
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Stromeyer H (1819) Chemische Untersuchung der natürlichen Boraxsäure, des Eisenpecherzes, des Picro-Pharmacoliths und des Polyhalits, eines neuen fossilen-Salzes, Annalen der Physik, 61, 177-189 [view file] |
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Stromeyer F (1820) Mineralogisch-chemische Untersuchungen über ein neues fossiles Salz, Journal für Chemie und Physik, 29, 389-410 [view file] |
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Schaller W T, Henderson E P (1932) Mineralogy of drill cores from the potash field of New Mexico and Texas, U.S. Geological Survey Bulletin, 833, 1-124 [view file] |
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Bindi L (2005) Reinvestigation of polyhalite, K2Ca2Mg(SO4)4·2H2O, Acta Crystallographica, E61, i135-i136 |
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Lane M D (2007) Mid-infrared emission spectroscopy of sulfate and sulfate-bearing minerals, American Mineralogist, 92, 1-18 [view file] |
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Xu H, Guo X, Bai J (2017) Thermal behavior of polyhalite: a high-temperature synchrotron XRD study, Physics and Chemistry of Minerals, 44, 125-135 |
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