Mineralogy Database

Hyalophane Mineral Data

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General Hyalophane Information

Help on Chemical  Formula: Chemical Formula: (K,Ba)Al(Si,Al)3O8
Help on Composition: Composition: Molecular Weight = 302.06 gm
   Potassium   9.71 %  K    11.69 % K2O
   Barium     11.37 %  Ba   12.69 % BaO
   Aluminum   15.63 %  Al   29.54 % Al2O3
   Silicon    20.92 %  Si   44.76 % SiO2
   Oxygen     42.37 %  O
             ______        ______ 
             100.00 %       98.68 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K0.75Ba0.25Al1.75Si2.25O8
Help on Environment: Environment: Magmatic and contact metamorphic.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1855
Help on Locality: Locality: Imfield, Switzerland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek hyalos - "glass" and phanos - "to appear."
Help on Name Pronunciation: Name Pronunciation: Hyalophane + Pronunciation Say HYALOPHANE
Help on Synonym: Synonym: ICSD 31192
  PDF 19-3
 

Hyalophane Image

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  Hyalophane

Comments: Twinned crystal of hyalophane slightly yellow from iron stains.
Location: Sarajevo, Bosnia, Yugoslavia. Scale: 4 x 3 cm.
© Isaias Casanova / IC Minerals

Hyalophane Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6579:1:0.5513
Help on Cell Dimensions: Cell Dimensions: a = 8.52, b = 12.95, c = 7.14, Z = 4; beta = 116° V = 708.06 Den(Calc)= 2.83
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.24(1), 3.31(0.9), 3(0.7),
 

Physical Properties of Hyalophane

Help on Cleavage: Cleavage: {001} Perfect, {010} Imperfect
Help on Color: Color: Colorless, Yellow, White, Red.
Help on Density: Density: 2.81
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 6-6.5 - Orthoclase-Pyrite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white
 

Optical Properties of Hyalophane

Help on Gladstone-Dale: 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
Help on Optical Data: Optical Data: Biaxial (-), a=1.542, b=1.545, g=1.547, bire=0.0050
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
Help on Pleochroism (z): Pleochroism (z): colorless.
 

Calculated Properties of Hyalophane

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.73 gm/cc
note: Specific Gravity of Hyalophane =2.81 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEHyalophane = 49.24 barns/electron
U=PEHyalophane x relectron= 134.23 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 135.85 (Gamma Ray American Petroleum Institute Units)
Concentration of Hyalophane per GRapi unit = 0.74 (%)

Estimated Radioactivity from Hyalophane - barely detectable

 

Hyalophane Classification

Help on  Dana Class: Dana Class: 76.01.01.03 (76)Tectosilicate Al-Si Framework
  (76.01)with Al-Si frameworks
  (76.01.01)K (Na,Ba) feldspars
 
76.01.01.01 Orthoclase KAlSi3O8 C 2/m 2/m
 
76.01.01.02 Sanidine (K,Na)(Si,Al)4O8 C 2/m 2/m
 
76.01.01.03 Hyalophane (K,Ba)Al(Si,Al)3O8 C 2/m 2/m
 
76.01.01.04 Celsian BaAl2Si2O8 I21/c 2/m
 
76.01.01.05 Microcline KAlSi3O8 C1 1
 
76.01.01.06 Anorthoclase (Na,K)AlSi3O8 C1 1
 
76.01.01.07 Rubicline! (Rb,K)AlSi3O8 P1 1
 
76.01.01.08 Filatovite! K[(Al,Zn)2(As,Si)2O8] I2/c 2/m
Help on  Strunz Class: Strunz Class: 09.FA.30 09 - SILICATES (Germanates)
  09.F - Tektosilicates without Zeolitic H2O
  09.FA -Tektosilicates without additional non-tetrahedral anions, (Al,B):Si = 1:1
 
09.FA.30 Buddingtonite (NH4)AlSi3O8•0.5(H2O) P 21 or P 21/m Mono
 
09.FA.30 Celsian BaAl2Si2O8 I21/c 2/m
 
09.FA.30 Anorthoclase (Na,K)AlSi3O8 C1 1
 
09.FA.30 Hyalophane (K,Ba)Al(Si,Al)3O8 C 2/m 2/m
 
09.FA.30 Orthoclase KAlSi3O8 C 2/m 2/m
 
09.FA.30 Microcline KAlSi3O8 C1 1
 
09.FA.30 Rubicline! (Rb,K)AlSi3O8 P1 1
 
09.FA.30 Sanidine (K,Na)(Si,Al)4O8 C 2/m 2/m
 

Other Hyalophane Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
Help on See Also: 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

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Hyalophane

(K,Ba)Al(Si,Al)3O8
Dana No: 76.01.01.03 Strunz No: 09.FA.30
Locality:

 

Notes:

 

 
   
 


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