Mineralogy Database

Ganophyllite Mineral Data

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General Ganophyllite Information

Help on Chemical  Formula: Chemical Formula: (K,Na)2(Mn,Al,Mg)8(Si,Al)12O29(OH)7•8-9(H2O)
Help on Composition: Composition: Molecular Weight = 1,514.20 gm
   Potassium   3.87 %  K     4.67 % K2O
   Sodium      0.76 %  Na    1.02 % Na2O
   Magnesium   2.41 %  Mg    3.99 % MgO
   Manganese  21.77 %  Mn   28.11 % MnO
   Aluminum    5.88 %  Al   11.11 % Al2O3
   Silicon    16.69 %  Si   35.71 % SiO2
   Hydrogen    1.60 %  H    14.28 % H2O
   Oxygen     47.02 %  O
             ______        ______ 
             100.00 %       98.89 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K1.5Na0.5Mn2+6Mg1.5Si9Al3.3O29(OH)7�8.5(H2O)
Help on Environment: Environment: Metamorphosed manganese deposit.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1890
Help on Locality: Locality: Harstig mine, Pajsberg, near Persberg, Vermland, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek for "luster" and "leaf" for the high luster on cleavage planes.
Help on Name Pronunciation: Name Pronunciation: Ganophyllite + Pronunciation Say GANOPHYLLITE
Help on Synonym: Synonym: ICSD 64788
  PDF 21-359

Ganophyllite Image

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Comments: Light brown micaceous ganophyllite with milky quartz.
Location: Gambatesa Mine, Genova, Liguria, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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Comments: SEM image of a ganophyllite crystal. (AmMin, 88:1325).
Location: Molinello Mine, Val Graveglia, Italy. Scale: Scale bar 100 µ-m.
© American Mineralogist

Ganophyllite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6118:1:1.8496
Help on Cell Dimensions: Cell Dimensions: a = 16.6, b = 27.13, c = 50.18, Z = 10; beta = 93.96° V = 22,545.01 Den(Calc)= 1.12
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: A2/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 12.5(1), 3.14(0.25), 2.7(0.14),

Physical Properties of Ganophyllite

Help on Cleavage: Cleavage: {???} Perfect
Help on Color: Color: Brownish yellow, Cinnamon brown.
Help on Density: Density: 2.84
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: Foliated - Two dimensional platy forms.
Help on Habit: Habit: Micaceous - Platy texture with "flexible" plates.
Help on Hardness: Hardness: 4-4.5 - Between Fluorite and Apatite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: brownish yellow

Optical Properties of Ganophyllite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.062 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -1.379 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.5241,KPDmeas= 0.2067,KC= 0.2203
Ncalc = 1.25 - 1.63
Help on Optical Data: Optical Data: Biaxial (-), a=1.537, b=1.611, g=1.613, bire=0.0760
Help on Pleochroism (x): Pleochroism (x): pale yellow brown.
Help on Pleochroism (y): Pleochroism (y): dark yellow brown.
Help on Pleochroism (z): Pleochroism (z): dark yellow brown.

Calculated Properties of Ganophyllite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.82 gm/cc
note: Specific Gravity of Ganophyllite =2.84 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEGanophyllite = 6.74 barns/electron
U=PEGanophyllite x relectron= 18.98 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 55.45 (Gamma Ray American Petroleum Institute Units)
Concentration of Ganophyllite per GRapi unit = 1.80 (%)

Estimated Radioactivity from Ganophyllite - barely detectable


Ganophyllite Classification

Help on  Dana Class: Dana Class: (74)Phyllosilicate Modulated Layers
  (74.01)with joined islands
  (74.01.02)Ganophyllite group Ganophyllite (K,Na)2(Mn,Al,Mg)8(Si,Al)12O29(OH)7•8-9(H2O) A2/a 2/m Eggletonite Na2Mn8[Si11AlO29](OH)7•11(H2O) Ia or I2/a Mono Tamaite! (Ca,K,Ba,Na)3-4Mn24(Si,Al)40(O,OH)112•21(H2O) P 21/a 2/m
Help on  Strunz Class: Strunz Class: 09.EG.30 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EG -Double nets with 6-membered and larger rings
09.EG.30 Eggletonite Na2Mn8[Si11AlO29](OH)7•11(H2O) Ia or I2/a Mono
09.EG.30 Ganophyllite (K,Na)2(Mn,Al,Mg)8(Si,Al)12O29(OH)7•8-9(H2O) A2/a 2/m
09.EG.30 Tamaite! (Ca,K,Ba,Na)3-4Mn24(Si,Al)40(O,OH)112•21(H2O) P 21/a 2/m

Other Ganophyllite Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2)
Help on See Also: See Also: Links to other databases for Ganophyllite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - Franklin Minerals(Dunn)
8 - Franklin Minerals(Palache)
9 - GeoScienceWorld
10 - Google Images
11 - Google Scholar
12 - Handbook of Mineralogy (MinSocAm)
13 - Handbook of Mineralogy (UofA)
14 - MinDAT
15 - Mineralienatlas (Deutsch)
16 - Online Mineral Museum
17 - QUT Mineral Atlas
18 - Ruff.Info

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Dana No: Strunz No: 09.EG.30





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