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Melkovite Mineral Data

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General Melkovite Information

Help on Chemical  Formula: Chemical Formula: CaFe+++H6(MoO4)4(PO4)•6(H2O)
Help on Composition: Composition: Molecular Weight = 938.74 gm
   Calcium      4.27 %  Ca    5.97 % CaO
   Iron         5.95 %  Fe    8.51 % Fe2O3
   Molybdenum  40.88 %  Mo   61.33 % MoO3
   Phosphorus   3.30 %  P     7.56 % P2O5
   Hydrogen     1.29 %  H    11.51 % H2O
   Oxygen      44.31 %  O
              ______        ______ 
              100.00 %       94.89 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaFe3+(MoO4)4(PO4)•6(H2O)
Help on Environment: Environment: Molybdenite-fluorite deposit.
Help on IMA Status: IMA Status: Approved IMA 1969
Help on Locality: Locality: Shunak Mountains, Kazakhstan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Vyacheslav Gavrilovich Melkov (1911-1991), Russian mineralogist.
Help on Name Pronunciation: Name Pronunciation: Melkovite + Pronunciation Say MELKOVITE

Melkovite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9448:1:0.5914
Help on Cell Dimensions: Cell Dimensions: a = 17.46, b = 18.48, c = 10.93, Z = 7; beta = 94.5° V = 3,515.81 Den(Calc)= 3.10
Help on Crystal System: Crystal System: Monoclinic Space Group: Unk.
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.92(1), 3.54(0.9), 8.42(0.8),

Physical Properties of Melkovite

Help on Cleavage: Cleavage: {???} Perfect
Help on Color: Color: Brownish yellow, Lemon.
Help on Density: Density: 2.971
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Pulverulent - Forms a loose, poorly-coherent powdery mass.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Earthy (Dull)
Help on Streak: Streak: yellow

Optical Properties of Melkovite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.187 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.137 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2703,KPDmeas= 0.2821,KC= 0.2377
Ncalc = 1.71 - 1.74
Help on Optical Data: Optical Data: Biaxial (?), b=1.838
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
Help on Pleochroism (z): Pleochroism (z): pale green.

Calculated Properties of Melkovite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.97 gm/cc
note: Specific Gravity of Melkovite =3.10 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.1
Boson Index = 0.9
Help on Photoelectric: Photoelectric: PEMelkovite = 67.95 barns/electron
U=PEMelkovite x rElectron Density= 201.51 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Melkovite is Not Radioactive

Melkovite Classification

Help on  Dana Class: Dana Class: (49)Basic and Hydrated Molybdates and Tungstates
  (49.04)(Compound Anions)
  (49.04.03)Dana Group Melkovite CaFeH6(MoO4)4(PO4)•6(H2O) Unk. Mono
Help on  Strunz Class: Strunz Class: 08.DM.15 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DM -With large and medium-sized cations, (OH, etc.):RO4 > 2:1
08.DM.15 Betpakdalite [Mg(H2O)6]Ca2(H2O)13[Mo8As2Fe3O36(OH)]•4(H2O) C 2/m 2/m
08.DM.15 Melkovite CaFeH6(MoO4)4(PO4)•6(H2O) Unk. Mono
08.DM.15 Natrobetpakdalite (Na,Ca)3Fe2(As2Mo6O28)•15(H2O) Unk Mono

Other Melkovite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Melkovite :
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: 08.DM.15





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