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Microcline Mineral Data + |
General Microcline Information |
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| KAlSi3O8 | |||
| Molecular Weight = 278.33 gm | |||
| Potassium 14.05 % K 16.92 % K2O | |||
| Aluminum 9.69 % Al 18.32 % Al2O3 | |||
| Silicon 30.27 % Si 64.76 % SiO2 | |||
| Oxygen 45.99 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| KAlSi3O8 | |||
| Granitic pegmatites, hydrothermal and metamorphic rocks. | |||
| Valid Species (Pre-IMA) 1830 | |||
| Common world wide occurrences. Link to MinDat.org Location Data. | |||
| From the Greek mikron - "little" and klinein - "to stoop." | |||
| Amazonstone - green | |||
Microcline Image | |||
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Microcline Crystallography |
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| a:b:c =0.6614:1:0.557 | |||
| a = 8.577, b = 12.967, c = 7.223, Z = 4; alpha = 90.65°, beta = 115.933°, gamma = 87.783° V = 721.85 Den(Calc)= 2.56 | |||
| Triclinic - PinacoidalH-M Symbol ( 1) Space Group: C1 | |||
| By Intensity(I/Io): 3.292(1), 3.241(0.96), 4.225(0.58), | |||
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Physical Properties of Microcline |
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| [001] Perfect, [010] Good | |||
| Bluish green, Green, Gray, Grayish yellow, Yellowish. | |||
| 2.56 | |||
| Translucent to transparent | |||
| Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. | |||
| Blocky - Crystal shape tends to be equant (e.g. feldspars). | |||
| Crystalline - Coarse - Occurs as well-formed coarse sized crystals. | |||
| Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). | |||
| 6 - Orthoclase | |||
| Non-fluorescent. | |||
| Vitreous (Glassy) | |||
| white | |||
Optical Properties of Microcline |
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| CI meas= 0.01 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.01 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2038,KPDmeas= 0.2038,KC= 0.2058 |
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| Biaxial (-), a=1.518, b=1.522, g=1.525, bire=0.0070, 2V(Calc)=80, 2V(Meas)=77-84. Dispersion relatively weak. | |||
| colorless. | |||
| colorless. | |||
| colorless. | |||
Calculated Properties of Microcline |
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relectron=2.54 gm/cc |
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| Fermion Index = 0.01437 Boson Index = 0.98563 |
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PEMicrocline = 2.85 barns/electron |
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| GRapi = 200.97 (Gamma Ray American Petroleum Institute Units) Estimated Radioactivity from Microcline |
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Microcline Classification |
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| 76.1.1.5 (76)Tectosilicate Al-Si Framework | |||
| (76.1)with Al-Si frameworks | |||
| (76.1.1)K (Na,Ba) feldspars | |||
| VIII/J.06-30 VIII - Silicates | |||
| VIII/J - Tectosilicates (network) without anions unfamiliar to the tetraheders | |||
| VIII/J.06 - Feldspar group, Buddingtonite - Orthoclase - Slawsonite series | |||
Other Microcline Information |
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| NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Mason68) | |||
| Links to other databases for Microcline : 1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 -Am. Min. Crystal Structure Database 4 - Amethyst Galleries' Mineral Gallery 5 - Applied Mineralogy 6 -Athena 7 - CalTech Mineral Spectroscopy 8 - Crocoite.com Mineral Locations 9 - EUROmin Project 10 - Franklin Minerals(Dunn) 11 - Franklin Minerals(Palache) 12 - Glendale Community College 13 -Google Images 14 -Google Scholar 15 -Handbook of Mineralogy (MinSocAm) 16 -Handbook of Mineralogy (UofA) 17 - HyperPhysics 18 -MinDAT 19 -MinMax(Deutsch) 20 -MinMax(English) 21 - Mineral and Gemstone Kingdom 22 -Mineral of the Month 23 -Mineralienatlas (Deutsch) 24 - Minerals in Thin Section-University of North Carolina 25 -Minerals in Thin Sections-Humboldt State 26 - Minerals of Wisconsin 27 - Philatelic Mineralogy 28 -QUT Mineral Atlas 29 - Thin Sections - Brock University 30 - UCLA - Petrography Thin-Sections 31 - WWW-MINCRYST 32 -École des Mines de Paris Search for Microcline using: Visit our Advertisers for Microcline : Translate Microcline Mineral Data : Ask about Microcline here : Print or Cut-and-Paste your Microcline Specimen Label here :
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