[Mineral Auctions] [Register] [Current Auctions] [Log In] [www.danweinrich.com] Dan Weinrich Auctions Specializing In Live Weekly Auctions Of Top Quality Mineral Specimens The Place To Find Great Specimens At Great Prices! General Microcline InformationKAlSi3O8 |
Molecular Weight = 278.33 gm |
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Potassium 14.05 % K 16.92 % K2O |
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Aluminum 9.69 % Al 18.32 % Al2O3 |
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Silicon 30.27 % Si 64.76 % SiO2 |
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Oxygen 45.99 % O |
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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." |
Microcline + Pronunciation |
Amazonstone - green |
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Microcline Crystallographya: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{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 |
Fluorescent, Short UV=cherry red. |
Vitreous (Glassy) |
white |
| Optical Properties of MicroclineCI 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 Ncalc = 1.53 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. |
| Calculated Properties of MicroclineBulk Density (Electron Density)=2.54 gm/cc |
note: Specific Gravity of Microcline =2.56 gm/cc. Fermion Index = 0.01 |
Boson Index = 0.99 PEMicrocline = 2.85 barns/electron |
U=PEMicrocline x relectron= 7.23 barns/cc. |
GRapi = 200.97 (Gamma Ray American Petroleum Institute Units)
Estimated Radioactivity from Microcline | Microcline Classification76.01.01.05 (76)Tectosilicate Al-Si Framework |
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(76.01)with Al-Si frameworks |
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(76.01.01)K (Na,Ba) feldspars |
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09.FA.30 09 - SILICATES (Germanates) |
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09.F - Tektosilicates without Zeolitic H2O |
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09.FA -Tektosilicates without additional non-tetrahedral anions, (Al,B):Si = 1:1 |
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| Other Microcline Information 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 - Athena 6 - CalTech Mineral Spectroscopy 7 - EUROmin Project 8 - Ecole des Mines de Paris 9 - Franklin Minerals(Dunn) 10 - Franklin Minerals(Palache) 11 - Glendale Community College 12 - Google Images 13 - Google Scholar 14 - Handbook of Mineralogy (MinSocAm) 15 - Handbook of Mineralogy (UofA) 16 - HyperPhysics 17 - MinDAT 18 - MinMax(Deutsch) 19 - MinMax(English) 20 - Mineral and Gemstone Kingdom 21 - Mineral of the Month 22 - Mineralienatlas (Deutsch) 23 - Minerals in Thin Section-University of North Carolina 24 - Minerals in Thin Sections-Humboldt State 25 - Philatelic Mineralogy 26 - QUT Mineral Atlas 27 - Ruff.Info 28 - Thin Sections - Brock University 29 - UCLA - Petrography Thin-Sections 30 - WWW-MINCRYST Search for Microcline using: Visit our Advertisers for Microcline : AA Mineral SpecimensB & L Fine Minerals Crystalarium.com Dan Weinrich Fine Minerals Dan Weinrich Auctions Dakota Matrix Desert Winds Gems and Minerals Excalibur Minerals Exceptional Minerals Fabre Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club Wrights Rock Shop Translate Microcline Mineral Data : Ask about Microcline here : Print or Cut-and-Paste your Microcline Specimen Label here :
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