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Huemulite

Big Photo

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

Formula:
Na
 
4
Mg[V
 
10
O
 
28
] · 24H
 
2
O
System:TriclinicColour:Yellowish orange to ...
Hardness:2½ - 3
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

Related Minerals - Nickel-Strunz Grouping):

- +
4.HG.05Fervanite
Fe
 
4
(VO
 
4
)
 
4
·5H
 
2
O
4.HG.15Vanalite
NaAl
 
8
V
 
10
O
 
38
·30H
 
2
O
4.HG.20Simplotite
CaV
 
4
O
 
9
·5H
 
2
O
4.HG.25Vanoxite
V
 
6
O
 
13
·8H
 
2
O
4.HG.30Navajoite
V
 
2
O
 
5
 · 3H
 
2
O
4.HG.35Delrioite
CaSr[(OH)
 
2
|V
 
2
O
 
6
] · 3H
 
2
O
4.HG.40Metadelrioite
CaSr[(OH)
 
2
|V
 
2
O
 
6
]
4.HG.45Barnesite
Na
 
2
[V
 
2
O
 
6
|V
 
4
O
 
10
] · 3H
 
2
O
4.HG.50Hendersonite
(Ca,Sr)
 
x
(V
5+
 
,V
4+
 
)
 
12
O
 
32
·12H
 
2
O (x about 2.6)
4.HG.55Grantsite
(Na
 
2
,Ca)[V
 
2
O
 
6
|(V
5+
 
,V
4+
 
)
 
4
O
 
10
] · 4H
 
2
O
4.HG.60Lenoblite
V
 
2
O
 
4
·2H
 
2
O
4.HG.65Satpaevite
Al
 
12
V
 
2
V
 
6
O
 
37
·30H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
21.1.1Metamunirite
NaVO
 
3
21.1.2Munirite
NaVO
 
3
·2H
 
2
O
21.1.3Barnesite
Na
 
2
[V
 
2
O
 
6
|V
 
4
O
 
10
] · 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
[O
 
2
|(VO
 
4
)
 
2
]
21.1.10Mcbirneyite
Cu
 
3
(VO
 
4
)
 
2
21.1.11Fingerite
Cu
 
11
[O
 
2
|(VO
 
4
)
 
6
]
21.1.12Volborthite
Cu
 
3
[(OH)
 
2
|V
 
2
O
 
7
] · 2H
 
2
O
21.1.13Tangeite
CaCu[OH|VO
 
4
]
21.1.14Vésigniéite
BaCu
 
3
[OH|VO
 
4
]
 
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.

Articles/Blogs about Huemulite

Internet Links for Huemulite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Huemulite in the Natural History Museum (London) online catalogue
  • Huemulite details from Handbook of Mineralogy (PDF)
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    Localities for Huemulite

    Hide Locality List
    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.
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    (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
        • Příbram
    		Lapis 7-8/2003
    UK
     
    • England
      • Devon
        • East Devon
    		Brian Craik-Smith collection (NHM London XRD ID)
    USA
     
    • Nevada
      • Eureka Co.
        • Fish Creek District
    		NBMG Spec. Pub. 31 Minerals of Nevada
        • Gibellini District
    		NBMG Spec. Pub. 31 Minerals of Nevada
    Rocks & Minerals, Nov. 1999
    Mineral and/or Locality
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