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Huemulite

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The Fish, Gibellini District, Eureka Co., Nevada, USA
© 2008, JGW

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Formula:
Na
 
4
Mg(V
 
10
O
 
28
) · 24H
 
2
O
System:TriclinicColour:Yellowish orange to ...
Hardness:2½ - 3
Member of:Pascoite Group
Name:For the type locality.
This page provides mineralogical data about Huemulite.

Classification of Huemulite

IMA status:Approved
Strunz 8th edition ID:4/G.01-10
Nickel-Strunz 10th (pending) edition ID:4.HG.10

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
G : Unclassified V oxides
Dana 8th edition ID:47.2.3.1

47 : VANADIUM OXYSALTS
2 : Anhydrous Vanadium Oxysalts Containing Hydroxyl or Halogen
Hey's CIM Ref.:21.1.6

21 : Vanadates (and vanadates with arsenate or phosphate)
1 : Vanadates of the alkalis and Cu
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Type Occurrence of Huemulite

Type Locality:Huemul Mine, Pampa Amarilla District, Malargüe Department, Mendoza, Argentina
General Appearance of Type Material:Massive
Place of Conservation of Type Material:Smithsonian Museum 120076
Year of Discovery:1966
Geological Setting of type material:In a Cu-U sandstone/conglomerate deposits.

Physical Properties of Huemulite

Lustre:Dull
Diaphaneity (Transparency):Translucent
Colour:Yellowish orange to orange
Streak:Yellow
Hardness (Mohs):2½ - 3
Density (measured):02.39(5) g/cm3
Density (calculated):02.404 g/cm3

Crystallography of Huemulite

Crystal System:Triclinic
Cell Parameters:a = 11.77Å, b = 11.83Å, c = 9.018(9) Å
α = 107.2°, β = 112.2°, γ = 101.5°
Ratio:a:b:c = 0.995 : 1 : 0.762
Unit Cell Volume:V 1,039.62 ų (Calculated from Unit Cell)
Z:1

Optical Data of Huemulite

Type:Biaxial (-)
RI values: nα = 1.679(3) nβ = 1.734(3) nγ = 1.742(2)
2V:Measured: 25° to 30°, Calculated: 40°
Maximum Birefringence:δ = 0.063

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:r > v strong
Pleochroism:Visible
Comments:X= light yellow
Y= golden yellow
Z= yellowish orange

Chemical Properties of Huemulite

Formula:
Na
 
4
Mg(V
 
10
O
 
28
) · 24H
 
2
O
Essential elements:H, Mg, Na, O, V
All elements listed in formula:H, Mg, Na, O, V

Relationship of Huemulite to other Species

Member of:Pascoite Group
Other Members of Group:

- +
Hummerite
K
 
2
Mg
 
2
(V
 
10
O
 
28
) · 16H
 
2
O
Lasalite
Na
 
2
Mg
 
2
(V
 
10
O
 
28
) · 20H
 
2
O
Magnesiopascoite
Ca
 
2
Mg(V
 
10
O
 
28
) · 16H
 
2
O
Pascoite
Ca
 
3
(V
 
10
O
 
28
) · 17H
 
2
O
Rakovanite
Na
 
3
(H
 
3
V
 
10
O
 
28
) · 15H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- +
4.HG.05Fervanite
Fe
3+
4
V
5+
4
O
 
16
 · 5H
 
2
O
4.HG.15Vanalite
NaAl
 
8
V
 
10
O
 
38
 · 30H
 
2
O
4.HG.20Simplotite
CaV
4+
4
O
 
9
 · 5H
 
2
O
4.HG.25Vanoxite
V
4+
4
V
5+
2
O
 
13
 · 8H
 
2
O
4.HG.30Navajoite
Fe
3+
 
V
5+
9
O
 
24
 · 12H
 
2
O
4.HG.35Delrioite
CaSr(V
 
2
O
 
6
)(OH)
 
2
 · 3H
 
2
O
4.HG.40Metadelrioite
CaSr(V
 
2
O
 
6
)(OH)
 
2
4.HG.45Barnesite
(Na,Ca)V
 
6
O
 
16
 · 3H
 
2
O
4.HG.50Hendersonite
(Ca,Sr)
 
1.3
V
 
6
O
 
16
 · 6H
 
2
O
4.HG.55Grantsite
(Na,Ca)V
 
6
O
 
16
 · 4H
 
2
O
4.HG.60Lenoblite
V
4+
2
O
 
4
 · 2H
 
2
O
4.HG.65Satpaevite
Al
 
12
V
4+
2
V
5+
6
O
 
37
 · 30H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
21.1.1Metamunirite
NaVO
 
3
21.1.2Munirite
NaVO
 
3
 · 1.9H
 
2
O
21.1.3Barnesite
(Na,Ca)V
 
6
O
 
16
 · 3H
 
2
O
21.1.4Bannermanite
(Na,K)
 
0.7
V
4+
0.7
V
5+
5.3
O
 
15
21.1.5Howardevansite
NaCuFe
 
2
(VO
 
4
)
 
3
21.1.7Blossite
α-Cu
 
2
(V
 
2
O
 
7
)
21.1.8Ziesite
β-Cu
 
2
(V
 
2
O
 
7
)
21.1.9Stoiberite
Cu
 
5
(VO
 
4
)
 
2
O
 
2
21.1.10Mcbirneyite
Cu
 
3
(VO
 
4
)
 
2
21.1.11Fingerite
Cu
 
11
(VO
 
4
)
 
6
O
 
2
21.1.12Volborthite
Cu
 
3
(V
 
2
O
 
7
)(OH)
 
2
 · 2H
 
2
O
21.1.13Tangeite
CaCu(VO
 
4
)(OH)
21.1.14Vésigniéite
BaCu
 
3
(VO
 
4
)
 
2
(OH)
 
2
21.1.15Lyonsite
Cu
 
3
Fe
 
4
(VO
 
4
)
 
6

Other Names for Huemulite

Synonyms:
IMA1965-012
Other Languages:
German:Huemulit
Spanish:Huemulita

Other Information

Thermal Behaviour:Melts at 500 C.
Other Information:Soluble in water. Most properties measured on recrystallized material.
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Huemulite

Reference List:

- +
American Mineralogist: 51: 1-13.

Colombo, B., Baggio, R., and Kampf, A.R. (2011): The crystal structure of the elusive huemulite. Canadian Mineralogist 49, 849-864.

Internet Links for Huemulite

Search Engines:
  • Look for Huemulite on Google
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    • External Links:
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  • Look for Huemulite on Athena Mineralogy
  • Look for Huemulite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Huemulite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
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  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
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  • Search for Huemulite from all mineral dealers at minfind.com
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  • Rare and Unusual minerals at Mineralogical Research Company
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  • Find Huemulite on www.crystalclassics.co.uk
  • SpiriferMinerals.com - high quality low prices
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    • Localities for Huemulite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Argentina
     
    • Mendoza
      • Malargüe Department
    		J.W. Anthony, R.A. Bideaux, K.W. Bladh, M.C. Nichols: Handbook of Mineralogy, Vol. III (1997)
    J.W. Anthony, R.A. Bideaux, K.W. Bladh, M.C. Nichols: Handbook of Mineralogy, Vol. III (1997)
        • Pampa Amarilla District
    		Gordillo, C.E., E. Linares, R.O. Toubes, H. Winchell (1966) American Mineralogist: 51: 1-13.
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Central Bohemia Region
    		Josef Vajdak (2008) Mineral News, 24, #3, 15.
    Lapis 7-8/2003
    UK
     
    • England
      • Devon
        • East Devon
          • Budleigh Salterton
    		Brian Craik-Smith collection (NHM London XRD ID)
    USA
     
    • Nevada
      • Eureka Co.
        • Fish Creek District
    		NBMG Spec. Pub. 31 Minerals of Nevada
        • Gibellini District
          • Fish Creek Range
    		Rocks & Minerals, Nov. 1999
    NBMG Spec. Pub. 31 Minerals of Nevada
    Frost, R.L., K.L. Erickson, M.L. Weier, and O. Carmody, Raman and infrared spectroscopy of selected vanadates. Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy, 2005. 61A(5): p. 829-834.
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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