General Hyalophane Information Chemical Formula: |
(K,Ba)Al(Si,Al)3O8 |
Composition: |
Molecular Weight = 302.06 gm |
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Potassium 9.71 % K 11.69 % K2O |
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Barium 11.37 % Ba 12.69 % BaO |
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Aluminum 15.63 % Al 29.54 % Al2O3 |
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Silicon 20.92 % Si 44.76 % SiO2 |
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Oxygen 42.37 % O |
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100.00 % 98.68 % = TOTAL OXIDE |
Empirical Formula: |
K0.75Ba0.25Al1.75Si2.25O8 |
Environment: |
Magmatic and contact metamorphic. |
IMA Status: |
Valid Species (Pre-IMA) 1855 |
Locality: |
Imfield, Switzerland. Link to MinDat.org Location Data. |
Name Origin: |
From the Greek hyalos - "glass" and phanos - "to appear." |
Name Pronunciation: |
Hyalophane + Pronunciation |
Synonym: |
ICSD 31192 |
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PDF 19-3 |
| | Hyalophane Image
Images:
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Hyalophane Crystallography Axial Ratios: |
a:b:c =0.6579:1:0.5513 |
Cell Dimensions: |
a = 8.52, b = 12.95, c = 7.14, Z = 4; beta = 116° V = 708.06 Den(Calc)= 2.83 |
Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m |
X Ray Diffraction: |
By Intensity(I/Io): 3.24(1), 3.31(0.9), 3(0.7), |
Crystal Structure:
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Mouse
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| Physical Properties of Hyalophane Cleavage: |
{001} Perfect, {010} Imperfect |
Color: |
Colorless, Yellow, White, Red. |
Density: |
2.81 |
Diaphaneity: |
Transparent to translucent |
Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. |
Habit: |
Crystalline - Fine - Occurs as well-formed fine sized crystals. |
Habit: |
Massive - Uniformly indistinguishable crystals forming large masses. |
Hardness: |
6-6.5 - Orthoclase-Pyrite |
Luminescence: |
Non-fluorescent. |
Luster: |
Vitreous (Glassy) |
Magnetism: |
Nonmagnetic |
Streak: |
white |
| Optical Properties of Hyalophane Gladstone-Dale: |
CI meas= -0.002 (Superior) - where the CI = (1-KPDmeas/KC) |
CI calc= 0.005 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1925,KPDmeas= 0.1938,KC= 0.1934 Ncalc = 1.54 - 1.55 Optical Data: |
Biaxial (-), a=1.542, b=1.545, g=1.547, bire=0.0050 |
Pleochroism (x): |
colorless. |
Pleochroism (y): |
colorless. |
Pleochroism (z): |
colorless. |
| Calculated Properties of Hyalophane Electron Density: |
Bulk Density (Electron Density)=2.73 gm/cc |
note: Specific Gravity of Hyalophane =2.81 gm/cc. Fermion Index: |
Fermion Index = 0.03 |
Boson Index = 0.97 Photoelectric: |
PEHyalophane = 49.24 barns/electron |
U=PEHyalophane x relectron= 134.23 barns/cc. Radioactivity: |
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GRapi = 135.85 (Gamma Ray American Petroleum Institute Units)
Estimated Radioactivity from Hyalophane - barely detectable | Hyalophane Classification Dana Class: |
76.01.01.03 (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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Strunz Class: |
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 Hyalophane Information References: |
NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32) |
See Also: |
Links to other databases for Hyalophane : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - Franklin Minerals(Dunn) 6 - Franklin Minerals(Palache) 7 - GeoScienceWorld 8 - Google Images 9 - Google Scholar 10 - Handbook of Mineralogy (MinSocAm) 11 - Handbook of Mineralogy (UofA) 12 - HyperPhysics 13 - MinDAT 14 - Mineralienatlas (Deutsch) 15 - Online Mineral Museum 16 - QUT Mineral Atlas 17 - Ruff.Info 18 - WWW-MINCRYST Search for Hyalophane using: Visit our Advertisers for Hyalophane : A Bijoux Google Search for HyalophaneAdam's Minerals Google Search for Hyalophane Cape Minerals Google Search for Hyalophane Dakota Matrix Minerals Google Search for Hyalophane Excalibur Mineral Corp. Google Search for Hyalophane Exceptional Minerals Google Search for Hyalophane John Betts Fine Minerals Search for Hyalophane McDougall Minerals Google Search for Hyalophane Mineral News Website Link Rock and Mineral Shows Google Search for Hyalophane Weinrich Minerals, Inc. Google Search for Hyalophane Ask about Hyalophane here : Print or Cut-and-Paste your Hyalophane Specimen Label here :
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