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Name: Portlandite RRUFF ID: R070210 Ideal Chemistry: Ca(OH)2 Locality: N'Chwaning II mine, Kalahari Manganese Field, northern Cape Province, South Africa Source: Michael Scott S105352 [view label] Owner: RRUFF Description: White flexible platy crystals associated with calcite Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis |
Mineral Group: [ Brucite (5) ] |
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: | R070210.1 | |||||||
Sample Description: | Powder | |||||||
Cell Refinement Output: |
a: 3.59357(7)Å b: 3.59357(7)Å c: 4.90935(9)Å alpha: 90° beta: 90° gamma: 120° Volume: 54.904(2)Å3 Crystal System: hexagonal |
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REFERENCES for Portlandite | |
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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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Tilley C E (1933) Portlandite, a new mineral from Scawt Hill, Co. Antrim, Mineralogical Magazine, 23, 419-420 [view file] |
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Foshag W F (1934) New mineral names, American Mineralogist, 19, 35-36 [view file] |
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Chaix-Pluchery O, Pannetier J, Bouillot J, Niepce J C (1987) Structural prereactional transformations in Ca(OH)2, Journal of Solid State Chemistry, 67, 225-234 |
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Kunz M, Leinenweber K, Parise J B, Wu T C, Bassett W A, Brister K, Weidner D J, Vaughan M T, Wang Y (1996) The baddeleyite-type high pressure phase of Ca(OH)2, High Pressure Research, 14, issue 4 311-319 |
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Xu H, Zhao Y, Zhang J, Hickmott D D, Daemen L L (2007) In situ neutron diffraction study of deuterated portlandite Ca(OD)2 at high pressure and temperature, Physics and Chemistry of Minerals, 34, 223-232 |
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Iizuka R, Yagi T, Komatsu K, Gotou H, Tsuchiya T, Kusaba K, Kagi H (2013) Crystal structure of the high-pressure phase of calcium hydroxide, portlandite: In situ powder and single-crystal X-ray diffraction study, American Mineralogist, 98, 1421-1428 |
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Haberle C W, Garvie L A J (2017) Extraterrestrial formation of oldhamite and portlandite through thermal metamorphism of calcite in the Sutter's Mill carbonaceous chondrite, American Mineralogist, 102, 2415-2421 |
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