Mineralogy Database

Zussmanite Mineral Data

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General Zussmanite Information

Help on Chemical  Formula: Chemical Formula: K(Fe++,Mg,Mn)13[AlSi17O42](OH)14
Help on Composition: Composition: Molecular Weight = 2,147.17 gm
   Potassium   1.82 %  K     2.19 % K2O
   Magnesium   1.13 %  Mg    1.88 % MgO
   Manganese   2.56 %  Mn    3.30 % MnO
   Aluminum    1.26 %  Al    2.37 % Al2O3
   Iron       28.61 %  Fe   36.81 % FeO
   Silicon    22.24 %  Si   47.57 % SiO2
   Hydrogen    0.66 %  H     5.87 % H2O
   Oxygen     41.73 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: KFe2+11MgMn2+AlSi17O42(OH)14
Help on Environment: Environment: Blue schist facies metamorphic rocks.
Help on IMA Status: IMA Status: Approved IMA 1964
Help on Locality: Locality: Laytonville quarry, 5 miles south of Laytonville, Mendocino Co., California. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Jack Zussman (1924-), crystallographer and emeritus professor of geology, Manchester University, England.
Help on Name Pronunciation: Name Pronunciation: Zussmanite + Pronunciation Say ZUSSMANITE
Help on Synonym: Synonym: ICSD 23570
  PDF 19-1500

Zussmanite Image

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Comments: Light to dark green crystals of zussmanite (.75 mm) embedded in schist..
Location: Longvale quarry, Mendocino Co., California, USA. Scale: Picture Size 2 cm.
© Tom Loomis / Dakota Matrix

Zussmanite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.46248
Help on Cell Dimensions: Cell Dimensions: a = 11.65, c = 28.688, Z = 3; V = 3,371.96 Den(Calc)= 3.17
Help on Crystal System: Crystal System: Trigonal - Pyramidal H-M Symbol (3) Space Group: R 3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.6(1), 4.78(0.45), 3.19(0.25),

Physical Properties of Zussmanite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: Light green.
Help on Density: Density: 3.146
Help on Diaphaneity: Diaphaneity: Translucent
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Zussmanite

Help on Dichroism (e): Dichroism (e): colorless.
Help on Dichroism (w): Dichroism (w): pale green.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.031 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.038 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1997,KPDmeas= 0.2012,KC= 0.2076
Ncalc = 1.65 - 1.66
Help on Optical Data: Optical Data: Uniaxial (-), e=1.623, w=1.643, bire=0.0200.

Calculated Properties of Zussmanite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.09 gm/cc
note: Specific Gravity of Zussmanite =3.15 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEZussmanite = 10.23 barns/electron
U=PEZussmanite x relectron= 31.62 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 25.83 (Gamma Ray American Petroleum Institute Units)
Concentration of Zussmanite per GRapi unit = 3.87 (%)

Estimated Radioactivity from Zussmanite - barely detectable


Zussmanite Classification

Help on  Dana Class: Dana Class: (74)Phyllosilicate Modulated Layers
  (74.01)with joined islands
  (74.01.04)Dana Group Zussmanite K(Fe,Mg,Mn)13[AlSi17O42](OH)14 R 3 3 Coombsite! K(Mn,Fe,Mg)13(Si,Al)18O42(OH)14 R 3 or R 3 Trig
Help on  Strunz Class: Strunz Class: 09.EG.35 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EG -Double nets with 6-membered and larger rings
09.EG.35 Coombsite! K(Mn,Fe,Mg)13(Si,Al)18O42(OH)14 R 3 or R 3 Trig
09.EG.35 Zussmanite K(Fe,Mg,Mn)13[AlSi17O42](OH)14 R 3 3

Other Zussmanite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Zussmanite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 09.EG.35





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