Orthoclase R040055

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Record 1 of 9  


Name: Orthoclase
RRUFF ID: R040055
Ideal Chemistry: KAlSi3O8
Locality: Madagascar
Source: Bob Downs
Owner: RRUFF
Description: Pale yellow fragments
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Mineral Group: [ feldspar (53) ]
Quick search: [ All Orthoclase samples (9) ]
CHEMISTRY 
RRUFF ID: R040055.2
Sample Description: Microprobe Fragment
Measured Chemistry: K0.96(Al0.96Si0.03Fe0.02)Si3.00O8; = light material. (K0.90Na0.02)(Al0.91Si0.08Fe0.02)Si3.00O8 = dark
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Sample is oriented, mounted onto a pin and polished
Pin ID: L00390
Orientation: Laser parallel to  a*  (1 0 0).     Fiducial mark perpendicular to laser is parallel to  -b   [0 -1 0].
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Raman Mode Analysis
Direction of polarization of laser relative to fiducial mark:
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R040055
Wavelength:
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
INFRARED SPECTRUM (Attenuated Total Reflectance) 
RRUFF ID: R040055.1
Instrument settings: SensIR Durascope on a Nicolet Magna 860 FTIR
Resolution:
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POWDER DIFFRACTION 
RRUFF ID: R040055.1
Sample Description: Powder
Cell Refinement Output: a: 8.6000(3)Å    b: 12.9978(3)Å    c: 7.2004(2)Å
alpha: 90.°    beta: 116.049(2)°    gamma: 90.°   Volume: 723.11(2)Å3    Crystal System: monoclinic
  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 Orthoclase

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]

Breithaupt J F A (1823) Feldspath. Orthoklas, in Vollst√§ndige Charakteristik des Mineral-Systems. Arnoldischen Buchhandlung Dresden 271-275   [view file]

Breithaupt J F A (1826) Bemerkungen über das geschlecht des feldspath - Grammit´s und beschreibung des oligoklases, einer neuen spezies desselben, Annalen der Physik und Chemie, 8, 231-242   [view file]

Coombs D S (1954) Ferriferous orthoclase from Madagascar, Mineralogical Magazine, 30, 409-427   [view file]

Mackenzie R C (1955) Mineralogical Society (London), American Mineralogist, 40, 773-780   [view file]

International Mineralogical Association (1962) International Mineralogical Association: Commission on new minerals and mineral names, Mineralogical Magazine, 33, 260-263   [view file]

Faye G H (1969) The optical absorption spectrum of tetrahedrally bonded Fe3+ in orthoclase, The Canadian Mineralogist, 10, 112-117   [view file]

Ferguson R B (1979) Whence orthoclase and microcline? A crystallographer’s interpretation of potassium feldspar phase relations, The Canadian Mineralogist, 17, 515-525   [view file]

Eggleton R A, Buseck P R (1980) The orthoclase-microcline inversion: A high-resolution transmission electron microscope study and strain analysis, Contributions to Mineralogy and Petrology, 74, 123-133

International Mineralogical Association (1980) International Mineralogical Association: Commission on new minerals and mineral names, Mineralogical Magazine, 43, 1053-1055   [view file]

Su S C, Ribbe P H, Bloss F D (1986) Alkali feldspars: Structural state determined from composition and optic axial angle 2V, American Mineralogist, 71, 1285-1296   [view file]

Brown W L, Parsons I (1989) Alkali feldspars: ordering rates, phase transformations and behaviour diagrams for igneous rocks, Mineralogical Magazine, 53, 25-42   [view file]

Harris M J, Salje E K H, Guttler B K, Carpenter M A (1989) Structural states of natural potassium feldspar: An infrared spectroscopic study, Physics and Chemistry of Minerals, 16, 649-658

Zhang M, Salje E K H, Carpenter M A, Parsons I, Kroll H, Reed S J B, Graeme-Barber A (1997) Exsolution and Al-Si disorder in alkali feldspars: Their analysis by infrared spectroscopy, American Mineralogist, 82, 849-857   [view file]

Liu L, El Gorsey A (2007) High-pressure phase transitions of the feldspars, and further characterization of lingunite, International Geology Review, 49, 854-860

Freeman J J, Wang A, Kuebler K E, Jolliff B L, Haskin L A (2008) Characterization of natural feldspars by Raman spectroscopy for future planetary exploration, The Canadian Mineralogist, 46, 1477-1500   [view file]

Parsons I (2010) Feldspars defined and described: a pair of posters published by the Mineralogical Society. Sources and supporting information, Mineralogical Magazine, 74, 529-551   [view file]