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Pertlikite Mineral Data

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General Pertlikite Information

Help on Chemical  Formula: Chemical Formula: K2(Fe++,Mg)2(Mg,Fe+++)4Fe+++2Al(SO4)12•18H2O
Help on Composition: Composition: Molecular Weight = 1,933.91 gm
   Potassium   4.00 %  K     4.82 % K2O
   Sodium      0.01 %  Na    0.02 % Na2O
   Magnesium   3.78 %  Mg    6.27 % MgO
   Manganese   0.77 %  Mn    0.99 % MnO
   Aluminum    1.40 %  Al    2.64 % Al2O3
   Zinc        0.03 %  Zn    0.04 % ZnO
   Iron       13.63 %  Fe    4.20 % FeO / 14.82 % Fe2O3
   Hydrogen    1.88 %  H    16.77 % H2O
   Sulfur     19.90 %  S    49.68 % SO3
   Oxygen     54.60 %  O
             ______        ______ 
             100.00 %      100.25 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K1.98Na0.01Fe2+1.13Mg0.49Mn2+0.27Fe3+0.1Zn0.01Mg2.52Fe3+1.49Fe3+2Al(SO4)12�18(H2O)
Help on Environment: Environment: Occurs in a pyrite-bearing trachytic eruptive rock, and probably formed after the decomposition of pyrite. Voltaite group.
Help on IMA Status: IMA Status: Approved IMA 2005 (Dana # Added)
Help on Locality: Locality: Madeni Zakh, Iran. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Franz Pertlik, Professor of Mineralogy and Crystallography, University of Vienna, Austria.
Help on Synonym: Synonym: IMA2005-055

Pertlikite Image

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Comments: B&W image of dark olive green to black crystal of pertlikite from the type material. (AmMin, v46:661).
Location: Madeni Zakh, Iran. Scale: Crystal size 1 mm.
© Canadian Mineralogist

Pertlikite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.41689
Help on Cell Dimensions: Cell Dimensions: a = 19.208, c = 27.2158, Z = 8; V = 10,041.19 Den(Calc)= 2.56
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: I 41/acd
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.396(1), 2.848(0.31), 2.078(0.29),5.543(0.28), 1.601(0.21), 2.534(0.21), 3.136(0.21),

Physical Properties of Pertlikite

Help on Cleavage: Cleavage: None
Help on Color: Color: Dark olive green, Black.
Help on Density: Density: 2.59
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Luster: Luster: Vitreous (Glassy)

Optical Properties of Pertlikite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.009 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.003 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2297,KPDmeas= 0.227,KC= 0.229
Ncalc = 1.59
Help on Optical Data: Optical Data: Uniaxial (-), e=1.586, w=1.59, bire=0.0040.

Calculated Properties of Pertlikite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.58 gm/cc
note: Specific Gravity of Pertlikite =2.56 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0084483998
Boson Index = 0.9915516002
Help on Photoelectric: Photoelectric: PEPertlikite = 5.92 barns/electron
U=PEPertlikite x relectron= 15.25 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 58.10 (Gamma Ray American Petroleum Institute Units)
Concentration of Pertlikite per GRapi unit = 1.72 (%)

Estimated Radioactivity from Pertlikite - barely detectable


Pertlikite Classification

Help on  Dana Class: Dana Class: (29)Hydrated Acid and Sulfates
  (29.09)with miscellaneous formulae
  (29.09.01)Voltaite Group Voltaite K2Fe5Fe3Al(SO4)12•18(H2O) F d3c 4/m 3 2/m Zincovoltaite K2Zn5Fe3Al(SO4)12•18(H2O) F d3c 4/m 3 2/m Pertlikite! K2(Fe,Mg)2(Mg,Fe)4Fe2Al(SO4)12•18H2O I 41/acd 4/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 07.CC.25 07 - SULFATES (SELENATES, TELLURATES)
  07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O
  07.CC -With medium-sized and large cations
07.CC.25 Monsmedite? H8K2Tl2(SO4)8•11(H2O) F d3c 4/m 3 2/m
07.CC.25 Voltaite K2Fe5Fe3Al(SO4)12•18(H2O) F d3c 4/m 3 2/m
07.CC.25 Zincovoltaite K2Zn5Fe3Al(SO4)12•18(H2O) F d3c 4/m 3 2/m
07.CC.25 Pertlikite! K2(Fe,Mg)2(Mg,Fe)4Fe2Al(SO4)12•18H2O I 41/acd 4/m 2/m 2/m

Other Pertlikite Information

Help on References: References: NAME( AmMin, v46:661) PHYS. PROP.(AmMin, v46:661) OPTIC PROP.(AmMin, v46:661)
Help on See Also: See Also: Links to other databases for Pertlikite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 07.CC.25





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