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Munakataite Mineral Data

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General Munakataite Information

Help on Chemical  Formula: Chemical Formula: Pb2Cu2(Se++++O3)(SO4)(OH)4
Help on Composition: Composition: Molecular Weight = 835.91 gm
   Calcium    0.05 %  Ca    0.07 % CaO
   Copper    14.75 %  Cu   18.46 % CuO
   Hydrogen   0.47 %  H     4.22 % H2O
   Lead      50.32 %  Pb   52.26 % Pb2O
   Selenium   9.45 %  Se   13.27 % SeO2
   Sulfur     3.91 %  S     9.77 % SO3
   Oxygen    21.05 %  O
            ______        ______ 
            100.00 %       98.06 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb2.03Cu1.94Ca0.01(SeO3)(SO4)1.02(OH)3.92
Help on Environment: Environment: Occurs as a thin coating on a fracture in quartz veins. Linarite-chenite group
Help on IMA Status: IMA Status: Approved IMA 2007 (Dana # Added)
Help on Locality: Locality: Kato mine, Munakata City, Fukuoka Prefecture, Japan Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Synonym: Synonym: IMA2007-012

Munakataite Image

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Comments: Light blue fiberous crystals of munakataite with green malachite. (Journal Mineralogical and Petrological Sci., v103:327).
Location: Kato mine, Munakata City, Fukuoka Prefecture, Japan. Scale: Picture size 1.8 mm.
© Journal of Mineralogical and Petrological Sciences

Munakataite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.7236:1:1.6397
Help on Cell Dimensions: Cell Dimensions: a = 9.766, b = 5.666, c = 9.291, Z = 2; beta = 102.4° V = 502.12 Den(Calc)= 5.53
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.18(1), 3.14(0.68), 4.47(0.57),4.86(0.44), 3.53(0.39), 2.72(0.22), 1.813(0.19), 2.33(0.18),

Physical Properties of Munakataite

Help on Cleavage: Cleavage: {h0l} Perfect
Help on Color: Color: Light blue.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Hardness: Hardness: 1.5 - Between Talc and Gypsum
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: bluish white

Optical Properties of Munakataite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= -0.809 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1611,KC= 0.0891
Ncalc = 1.49
Help on Optical Data: Optical Data: Biaxial (?), b=1.891

Calculated Properties of Munakataite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.83 gm/cc
note: Specific Gravity of Munakataite =5.53 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.11
Boson Index = 0.89
Help on Photoelectric: Photoelectric: PEMunakataite = 899.12 barns/electron
U=PEMunakataite x rElectron Density=4,344.08 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Munakataite is Not Radioactive

Munakataite Classification

Help on  Dana Class: Dana Class: (33)Selenates and Tellurates
  (33.01)as A+ (B++)m XO4 Zq
  (33.01.01)Schmiederite Series Schmiederite Pb2Cu2(SeO3)(SeO4)(OH)4 P 21/m 2/m Munakataite! Pb2Cu2(SeO3)(SO4)(OH)4 P 21/m 2/m
Help on  Strunz Class: Strunz Class: 07.BC.65 07 - SULFATES (SELENATES, TELLURATES)
  07.B - Sulfates (selenates, etc.) with Additional Anions, without H2O
  07.BC -With medium-sized and large cations
07.BC.65 Linarite PbCu(SO4)(OH)2 P 21/m 2/m
07.BC.65 Schmiederite Pb2Cu2(SeO3)(SeO4)(OH)4 P 21/m 2/m
07.BC.65 Munakataite! Pb2Cu2(SeO3)(SO4)(OH)4 P 21/m 2/m

Other Munakataite Information

Help on References: References: NAME( Journal Mineralogical and Petrological Sci., v103:327) PHYS. PROP.(Journal Mineralogical and Petrological Sci., v103:327) OPTIC PROP.(Journal Mineralogical and PetrologicalSci.,
Help on See Also: See Also: Links to other databases for Munakataite :
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.BC.65





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