Microcline R050193

Name: Microcline
RRUFF ID: R050193
Ideal Chemistry: KAlSi3O8
Locality: Devil's Head, Douglas County, Colorado, USA
Source: Dave Bunk Minerals
Owner: RRUFF
Description: White to colorless heterogeneous mixture of K and Na feldspar in a cluster of crystals. Crystal structure determined, presented below. This sample is known as an intermediate microcline in the literature.
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Mineral Group: [ feldspar (58) ]
Quick search: [ All Microcline samples (7) ]
RRUFF ID: R050193.2
Sample Description: Microprobe Fragment
Measured Chemistry: (K0.929Na0.071)(Al1.005Si2.994Fe0.001)O7.993F0.007 ; Light Band : (Na0.973K0.007Ca0.020)(Al1.020Si2.980)O8 ; Dark Band
Sample Description: Sample is oriented and mounted on a pin.
Pin ID: L01042
Orientation: Laser parallel to  a*  (1 0 0).     Fiducial mark perpendicular to laser is parallel to  -b   [0 -1 0].

  To download sample data,
  please select a specific
  orientation angle.

Direction of polarization of laser relative to fiducial mark:
X Min:    X Max:    X Sort:
RRUFF ID: R050193
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
INFRARED SPECTRUM (Attenuated Total Reflectance) 
RRUFF ID: R050193.1
Sample Description: Powder
Instrument settings: SensIR Durascope on a Nicolet Magna 860 FTIR
X Min:    X Max:    X Sort:
RRUFF ID: R050193.1
Sample Description: Powder
Instrument settings: PIKE GladiATR - Far-IR on a Nicolet Magna 860 FTIR
X Min:    X Max:    X Sort:
RRUFF ID: R050193.1
Sample Description: Powder
Cell Refinement Output: a: 8.5886(6)Å    b: 12.976(2)Å    c: 7.224(2)Å
alpha: 90.33(1)°    beta: 116.08(1)°    gamma: 89.07(2)°   Volume: 723.0(0)Å3    Crystal System: triclinic
  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.

X Min:    X Max:    X Sort:
REFERENCES for Microcline

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 (1830) Ueber die Felsite und einige deue Specien ihres Geschlechts, Journal für Chemie und Physik, 60, 316-330   [view file]

Fleischer M (1958) New mineral names, American Mineralogist, 43, 1006-1008   [view file]

Finney J J, Bailey S W (1964) Crystal structure of an authigenic maximum microcline, Zeitschrift für Kristallographie, 119, 413-436   [view file]

Cherry M E, Trembath L T (1979) The disordering of alkali feldspars. I. Dry heating of a microcline perthite, The Canadian Mineralogist, 17, 527-535   [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

Griffen D T, Johnson B T (1984) Strain in triclinic alkali feldspars: a crystal structure study, American Mineralogist, 69, 1072-1077

Martin R F, Falster A U (1986) Proterozoic sanidine and microcline in pegmatite, Wausau complex, Wisconsin, The Canadian Mineralogist, 24, 709-716   [view file]

Blasi A, Blasi C P, Zanazzi P F (1987) A re-examination of the Pellotsalo microcline: mineralogical implications and genetic considerations, The Canadian Mineralogist, 25, 527-537   [view file]

Ferguson R B, Ball N A (1987) Quantitative phase-analysis of Rb-enriched maximum microcline and low albite by X-ray powder diffractometry, The Canadian Mineralogist, 25, 337-345   [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

White J C, Barnett R L (1990) Microstructural signatures and glide twins in microcline, Hemlo, Ontario, The Canadian Mineralogist, 28, 757-769   [view file]

Mernagh T P (1991) Use of the laser Raman microprobe for discrimination amongst feldspar minerals, Journal of Raman Spectroscopy, 22, 453-457

Blum A E (1994) Feldspars in weathering, in I. Parson (ed.), Feldspars and their reactions Kluwer Academic Dordrecht, the Netherlands 595-630

Allan D R, Angel R J (1997) A high-pressure structural study of microcline (KAlSi3O8) to 7 GPa, European Journal of Mineralogy, 9, 263-275

Uchida H (2007) Crystal structure of orthoclase R050193 from Devil's Head, Douglas County, Colorado, USA, RRUFF Document, R050193, 1-1   [view file]

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]

Liu S (2015) Rietveld structure refinement of microcline, European Journal of Mineralogy, 27, 501-510