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Grantsite

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F33 Mine, Grants District, Cibola Co., New Mexico, USA
© 2007, JGW




Formula:
(Na,Ca)V
 
6
O
 
16
 · 4H
 
2
O
System:MonoclinicColour:Dark olive green to ...
Hardness:1 - 2
Member of:Hewettite Group
Name:For the town of Grants, New Mexico
This page provides mineralogical data about Grantsite.

Classification of Grantsite

IMA status:Approved
Strunz 8th edition ID:4/G.12-20
Nickel-Strunz 10th (pending) edition ID:4.HG.55

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:47.3.1.5

47 : VANADIUM OXYSALTS
3 : Hydrated Normal Vanadium Oxysalts
Hey's CIM Ref.:21.2.11

21 : Vanadates (and vanadates with arsenate or phosphate)
2 : Vanadates of Mg, Ca, Sr or Ba
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Type Occurrence of Grantsite

Co-type Localities:F33 Mine, Grants District, Cibola Co., New Mexico, USA
Parco No. 23 Mine, Parco Mine Group, Thompsons District (S. E. Thomsons), Grand Co., Utah, USA
Year of Discovery:1961
Geological Setting of type material:Oxidized "corvusite-type" vanadiferous uranium ores. In sandstones and limestone.

Physical Properties of Grantsite

Lustre:Sub-Adamantine, Silky
Colour:Dark olive green to greenish black
Hardness (Mohs):1 - 2
Tenacity:Waxy
Density (measured):2.94(1) g/cm3

Crystallography of Grantsite

Crystal System:Monoclinic
Cell Parameters:a = 17.54Å, b = 3.60Å, c = 12.41Å
α = 95.15°
Ratio:a:b:c = 4.872 : 1 : 3.447
Unit Cell Volume:V 0.00 ų (Calculated from Unit Cell)
Morphology:Aggregates, bladed crystals
Comment:Golden Cycle mine

Optical Data of Grantsite

Type:Biaxial (-)
RI values: nα = 1.820
Maximum Birefringence:δ = 1.820

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:none

Chemical Properties of Grantsite

Formula:
(Na,Ca)V
 
6
O
 
16
 · 4H
 
2
O
Essential elements:H, Na, O, V
All elements listed in formula:Ca, H, Na, O, V

Relationship of Grantsite to other Species

Member of:Hewettite Group
Other Members of Group:

- +
Barnesite
(Na,Ca)V
 
6
O
 
16
 · 3H
 
2
O
Hendersonite
(Ca,Sr)
 
1.3
V
 
6
O
 
16
 · 6H
 
2
O
Hewettite
CaV
 
6
O
 
16
 · 9H
 
2
O
Metahewettite
CaV
 
6
O
 
16
 · 3H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- +
4.HG.05Fervanite
Fe
3+
4
V
5+
4
O
 
16
 · 5H
 
2
O
4.HG.10Huemulite
Na
 
4
Mg(V
 
10
O
 
28
) · 24H
 
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.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:

- +
21.2.1Metarossite
Ca(V
 
2
O
 
6
) · 2H
 
2
O
21.2.2Rossite
Ca(V
 
2
O
 
6
) · 4H
 
2
O
21.2.3Metahewettite
CaV
 
6
O
 
16
 · 3H
 
2
O
21.2.4Hewettite
CaV
 
6
O
 
16
 · 9H
 
2
O
21.2.5Pintadoite
Ca
 
2
(V
 
2
O
 
7
) · 9H
 
2
O
21.2.6Hendersonite
(Ca,Sr)
 
1.3
V
 
6
O
 
16
 · 6H
 
2
O
21.2.7Fernandinite
(Ca,K)(V
5+
 
,V
4+
 
,Fe
2+
 
)
 
8
O
 
20
 · 10H
 
2
O
21.2.8Pascoite
Ca
 
3
(V
 
10
O
 
28
) · 17H
 
2
O
21.2.9Sherwoodite
Ca
 
4.5
(AlV
4+
2
V
5+
12
O
 
40
) · 28H
 
2
O
21.2.10Melanovanadite
Ca
 
2
(V
5+
 
,V
4+
 
)
 
4
O
 
10
 · 5H
 
2
O
21.2.12Hummerite
K
 
2
Mg
 
2
(V
 
10
O
 
28
) · 16H
 
2
O
21.2.13Metadelrioite
CaSr(V
 
2
O
 
6
)(OH)
 
2
21.2.14Delrioite
CaSr(V
 
2
O
 
6
)(OH)
 
2
 · 3H
 
2
O
21.2.15Straczekite
(Ca,K,Ba)(V
5+
 
,V
4+
 
)
 
8
O
 
20
 · 3H
 
2
O
21.2.16Gamagarite
Ba
 
2
(Fe
3+
 
,Mn
3+
 
)(VO
 
4
)
 
2
(OH)

Other Names for Grantsite

Other Languages:
German:Grantsit
Spanish:Grantsita

Other Information

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 Grantsite

Reference List:

- +
Weeks, A.D., Lindberg, M.L., Truesdell, A.H., and Meyrowitz, R. (1964): Grantsite, a new hydrated sodium calcium vanadate from New Mexico, Colorado and Utah. American Mineralogist 49, 1511-1526.

Evans, Jr., H.T., and Hughes, J.M. (1990): Crystal chemistry of the natural vanadium bronzes. American Mineralogist 75, 508-521.

Internet Links for Grantsite

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    • Localities for Grantsite

    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.
    USA
     
    • Colorado
      • Montrose Co.
        • Uravan District
    		Minerals of Colorado (1997) Eckels, E. B.; Am Min (1964) 49:1511-1526
    Minerals of Colorado (1997) Eckels, E. B.; Am Min (1964) 49:1511-1526
    • New Mexico
      • Cibola Co.
        • Grants District
    		Minerals of New Mexico 3rd ed.; Am Min (1964) 49:1511-1526
      • McKinley Co.
    		Northrop, Minerals of New Mexico, 3rd Rev. Ed., 1996
          • Ambrosia Lake area
    		Jeff Weismann
    • Utah
      • Grand Co.
        • Thompsons District (S. E. Thomsons)
          • Parco Mine Group
    		[UGMS Bull 117 Minerals and Mineral Localities of Utah; Am Min (1964) 49:1511-1526
    Van King
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