Huemulite Mineral Data

General Huemulite Information

Chemical Formula:

Na4Mg(V10O28)•24(H2O)

Composition:

Molecular Weight = 1,506.03 gm

Sodium 6.11 % Na 8.23 % Na₂O

Magnesium 1.61 % Mg 2.68 % MgO

Vanadium 33.83 % V 60.38 % V₂O₅

Hydrogen 3.21 % H 28.71 % H₂O

Oxygen 55.24 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₄MgV⁵⁺₁₀O₂₈•24(H₂O)

Environment:

Granular coatings on sandstone.

IMA Status:

Approved IMA 1966

Locality:

Huemul mine, Mendoza Province, Argentina. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Huemulite + Pronunciation

Huemulite Image

Images:

Huemulite

Comments: Brownish orange aggregate of huemulite crystals.
Location: Walker mine, Thompson, Grand County, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Huemulite Crystallography

Axial Ratios:

a:b:c =0.9942:1:0.7617

Cell Dimensions:

a = 11.77, b = 11.838, c = 9.018, Z = 1; alpha = 107.22°, beta = 112.17°, gamma = 101.5° V = 1,089.14 Den(Calc)= 2.30

Crystal System:

Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 7.62(1), 10.59(0.9), 9.12(0.6),

Physical Properties of Huemulite

Cleavage:

{???} Perfect

Color:

Yellow, Yellow orange, Red orange.

Density:

2.39

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Hardness:

2.5-3 - Finger Nail-Calcite

Luster:

Vitreous - Dull

Streak:

yellow

Optical Properties of Huemulite

Gladstone-Dale:

CI meas= 0.072 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.076 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2993,KPDmeas= 0.3006,KC= 0.3239
Ncalc = 1.77 - 1.78

Optical Data:

Biaxial (-), a=1.679, b=1.734, g=1.742, bire=0.0630, 2V(Calc)=40, 2V(Meas)=25-30. Dispersion r > v strong.

Pleochroism (x):

pale yellow.

Pleochroism (y):

golden yellow.

Pleochroism (z):

yellow orange.

Calculated Properties of Huemulite

Electron Density:

Bulk Density (Electron Density)=2.38 gm/cc
note: Specific Gravity of Huemulite =2.39 gm/cc.

Fermion Index:

Fermion Index = 0.0027294559
Boson Index = 0.9972705441

Photoelectric:

PE_Huemulite= 6.48 barns/electron
U=PE_Huemulite x rElectron Density= 15.43 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Huemulite is Not Radioactive

Huemulite Classification

Dana Class:

47.02.03.01 (47)Vanadium Oxysalts

(47.02)(VmOn)

(47.02.03)Dana Group

47.02.03.01 Huemulite Na4Mg(V10O28)•24(H2O) P1 1

Strunz Class:

04.HG.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.H - V[5,6] Vanadates

04.HG -Unclassified V oxides

04.HG.10 Huemulite Na4Mg(V10O28)•24(H2O) P1 1

Other Huemulite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Huemulite :
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 Huemulite Specimen Label here :

Huemulite

Na4Mg(V10O28)•24(H2O)
Dana No: 47.02.03.01 Strunz No: 04.HG.10
Locality:

Notes:

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