Portlandite R070210

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) ]
RRUFF ID: R070210.2
Sample Description: Microprobe Fragment
Measured Chemistry: Ca1.00(OH)2
Microprobe Data File: [ Download Excel File ]
Sample Description: Unoriented sample

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RRUFF ID: R070210
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
INFRARED SPECTRUM (Attenuated Total Reflectance) 
RRUFF ID: R070210.1
Sample Description: Powder
Instrument settings: SensIR Durascope on a Nicolet Magna 860 FTIR
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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
  File Type Information Close
Calculated diffraction file.

  File Type Information Close
Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

  File Type Information Close
Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

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REFERENCES for Portlandite

American Mineralogist Crystal Structure Database Record: [view record]

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]

Tilley C E (1933) Portlandite, a new mineral from Scawt Hill, Co. Antrim, Mineralogical Magazine, 23, 419-420   [view file]

Foshag W F (1934) New mineral names, American Mineralogist, 19, 35-36   [view file]

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

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

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

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

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