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Mendozavilite Mineral Data

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General Mendozavilite Information

Help on Chemical  Formula: Chemical Formula: (Na,Mg)Ca2[Mo++++++8P+++++2Fe+++3O36(OH)]•n(H2O), n~9
Help on Composition: Composition: Molecular Weight = 1,847.68 gm
   Sodium       0.75 %  Na    1.01 % Na2O
   Strontium    0.47 %  Sr    0.56 % SrO
   Calcium      3.69 %  Ca    5.16 % CaO
   Magnesium    0.26 %  Mg    0.44 % MgO
   Iron         9.07 %  Fe   12.96 % Fe2O3
   Molybdenum  41.54 %  Mo   62.32 % MoO3
   Phosphorus   3.35 %  P     7.68 % P2O5
   Hydrogen     1.04 %  H     9.26 % H2O
   Oxygen      39.83 %  O
              ______        ______ 
              100.00 %       99.39 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na0.6Mg0.2Ca1.7Sr0.1Mo8P2Fe3+3O36(OH)�9(H2O)
Help on Environment: Environment: Mo-rich pegmatite.
Help on IMA Status: IMA Status: Approved IMA 1986
Help on Locality: Locality: Cumobabi molybdenum deposit, SW of Cumpas, Sonora, Mexico. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for H. Mendoza Avila, Mexican geologist, who found the mineral.
Help on Name Pronunciation: Name Pronunciation: Mendozavilite + Pronunciation Say MENDOZAVILITE

Mendozavilite Image

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Comments: Vuggy matrix covered with yellow micro crystals of mendozavilite.
Location: Rustler mine, Tooele County, Utah, USA. Scale: Specimen size 1 cm.
© John Veevaert

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Comments: Light yellow micro crystals of mendozavilite and earthy alterations in vuggy quartz matrix with black schorl.
Location: Rustler mine, Tooele Co., Utah, USA. Scale: Picture size 1 cm.
© Tom Loomis / Dakota Matrix

Mendozavilite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.7216:1:1.372
Help on Cell Dimensions: Cell Dimensions: a = 18.952, b = 11.008, c = 15.103, Z = 3; beta = 129.89° V = 2,417.57 Den(Calc)= 3.81
Help on Crystal System: Crystal System: Monoclinic Space Group: Unk.
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.81(1)(111,110), 11.51(0.56)(001), 9.56(0.31)(201),3.65(0.19)(221,400), 2.993(0.17)(222), 3.12(0.16)(113), 4.37(0.16)(220),

Physical Properties of Mendozavilite

Help on Color: Color: Yellow, Orange.
Help on Density: Density: 3.85
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Hardness: Hardness: 1.5 - Between Talc and Gypsum
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: light yellow

Optical Properties of Mendozavilite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.202 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.193 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2004,KPDmeas= 0.1984,KC= 0.2485
Ncalc = 1.95 - 1.96
Help on Optical Data: Optical Data: Biaxial (+), a=1.762, b=1.763, g=1.766, bire=0.0040, 2V(Calc)=62, 2V(Meas)=5-15. Dispersion very strong, r > v.
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): pale yellow.
Help on Pleochroism (z): Pleochroism (z): pale yellow.

Calculated Properties of Mendozavilite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.62 gm/cc
note: Specific Gravity of Mendozavilite =3.81 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.1
Boson Index = 0.9
Help on Photoelectric: Photoelectric: PEMendozavilite = 70.87 barns/electron
U=PEMendozavilite x rElectron Density= 256.56 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Mendozavilite is Not Radioactive

Mendozavilite Classification

Help on  Dana Class: Dana Class: (49)Basic and Hydrated Molybdates and Tungstates
  (49.04)(Compound Anions)
  (49.04.05)Dana Group Mendozavilite (Na,Mg)Ca2[Mo8P2Fe3O36(OH)]•n(H2O),n~9 Unk. Mono
Help on  Strunz Class: Strunz Class: 07.GB.45 07 - SULFATES (SELENATES, TELLURATES)
  07.G - Molybdates, Wolframates and Niobates
  07.GB -With additional anions and/or H2O
07.GB.45 Mendozavilite (Na,Mg)Ca2[Mo8P2Fe3O36(OH)]•n(H2O),n~9 Unk. Mono
07.GB.45 Paramendozavilite NaAl4Fe7(PO4)5(PMo12O40)(OH)16•56(H2O) Unk. Mono

Other Mendozavilite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(AmMin, Vol 88, p 478) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Mendozavilite :
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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Print or Cut-and-Paste your Mendozavilite Specimen Label here :


(Na,Mg)Ca2[Mo++++++8P+++++2Fe+++3O36(OH)]•n(H2O), n~9
Dana No: Strunz No: 07.GB.45





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