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Grantsite

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Grants, New Mexico
Formula:
(Na,Ca)2+x(V5+,V4+)6O16 · 4H2O
Colour:
Dark olive green to greenish black
Lustre:
Sub-Adamantine, Silky
Hardness:
1 - 2
Specific Gravity:
2.94
Crystal System:
Monoclinic
Member of:
Name:
For the town of Grants, New Mexico, in the area of which it was discovered.
This page provides mineralogical data about Grantsite.


Hide all sections | Show all sections

Classification of GrantsiteHide

Approved
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
47.3.1.5

47 : VANADIUM OXYSALTS
3 : Hydrated Normal Vanadium Oxysalts
21.2.11

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

Physical Properties of GrantsiteHide

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

Optical Data of GrantsiteHide

Type:
Biaxial (-)
RI values:
nα = 1.820
Max Birefringence:
δ = 1.820
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
none

Chemical Properties of GrantsiteHide

Formula:
(Na,Ca)2+x(V5+,V4+)6O16 · 4H2O
IMA Formula:
(Na,Ca)2+x(V5+,V4+)6O16 · 4H2O

Crystallography of GrantsiteHide

Crystal System:
Monoclinic
Cell Parameters:
a = 12.429 Å, b = 3.604 Å, c = 17.542 Å
β = 95.33°
Ratio:
a:b:c = 3.449 : 1 : 4.867
Unit Cell V:
782.38 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Aggregates, bladed crystals
Comment:
Similar data for material from Golden Cycle mine: 12.41, 3.60, 17.54, 95.15

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
12.4 (18)
8.74 (100)
4.37 (10)
3.606 (28)
3.008 (14)
2.869 (12)
2.280 (11)

Type Occurrence of GrantsiteHide

Geological Setting of Type Material:
Oxidized "corvusite-type" vanadiferous uranium ores. In sandstones and limestone.

Other Language Names for GrantsiteHide

German:Grantsit
Spanish:Grantsita

Relationship of Grantsite to other SpeciesHide

Member of:
Other Members of this group:
Barnesite(Na,Ca)V6O16 · 3H2OMon. 2/m : P2/m
Hendersonite(Ca,Sr)1.3V6O16 · 6H2OOrth.
HewettiteCaV6O16 · 9H2OMon. 2/m : P21/m
MetahewettiteCaV6O16 · 3H2OMon. 2/m

Common AssociatesHide

Associated Minerals Based on Photo Data:
Calcite1 photo of Grantsite associated with Calcite on mindat.org.
Tyuyamunite1 photo of Grantsite associated with Tyuyamunite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

4.HG.CalciodelrioiteCa(VO3)2·4H2O Mon. 2/m : B2/b
4.HG.05FervaniteFe3+4V5+4O16 · 5H2OMon.
4.HG.10HuemuliteNa4Mg(V10O28) · 24H2OTric.
4.HG.15VanaliteNaAl8V10O38 · 30H2OMon.
4.HG.20SimplotiteCaV4+4O9 · 5H2OMon.
4.HG.25VanoxiteV4+4V5+2O13 · 8H2O
4.HG.30NavajoiteFe3+V5+9O24 · 12H2OMon. 2/m : B2/m
4.HG.35DelrioiteCaSr(V2O6)(OH)2 · 3H2OMon.
4.HG.40MetadelrioiteCaSr(V2O6)(OH)2Tric.
4.HG.45Barnesite(Na,Ca)V6O16 · 3H2OMon. 2/m : P2/m
4.HG.50Hendersonite(Ca,Sr)1.3V6O16 · 6H2OOrth.
4.HG.60LenobliteV4+2O4 · 2H2OOrth. 2 2 2 : P21 21 21
4.HG.65SatpaeviteAl12V4+2V5+6O37 · 30H2O

Related Minerals - Dana Grouping (8th Ed.)Hide

47.3.1.1HewettiteCaV6O16 · 9H2OMon. 2/m : P21/m
47.3.1.2MetahewettiteCaV6O16 · 3H2OMon. 2/m
47.3.1.3Barnesite(Na,Ca)V6O16 · 3H2OMon. 2/m : P2/m
47.3.1.4Hendersonite(Ca,Sr)1.3V6O16 · 6H2OOrth.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

21.2.1MetarossiteCa(V2O6) · 2H2OTric. 1 : P1
21.2.2RossiteCa(VO3)2•4H2OTric. 1 : P1
21.2.3MetahewettiteCaV6O16 · 3H2OMon. 2/m
21.2.4HewettiteCaV6O16 · 9H2OMon. 2/m : P21/m
21.2.5PintadoiteCa2(V2O7) · 9H2O
21.2.6Hendersonite(Ca,Sr)1.3V6O16 · 6H2OOrth.
21.2.7Fernandinite(Ca,K)(V5+,V4+,Fe2+)8O20 · 10H2OMon. 2/m : B2/m
21.2.8PascoiteCa3(V10O28) · 17H2OMon. 2 : B2
21.2.9SherwooditeCa4.5(AlV4+2V5+12O40) · 28H2OTet. 4/mmm (4/m 2/m 2/m) : I41/amd
21.2.10MelanovanaditeCa(V5+,V4+)4O10 · 5H2OTric. 1 : P1
21.2.12HummeriteK2Mg2(V10O28) · 16H2OTric.
21.2.13MetadelrioiteCaSr(V2O6)(OH)2Tric.
21.2.14DelrioiteCaSr(V2O6)(OH)2 · 3H2OMon.
21.2.15Straczekite(Ca,K,Ba)(V5+,V4+)8O20 · 3H2OMon.
21.2.16GamagariteBa2Fe3+(VO4)2(OH)Mon. 2/m : P21/m

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for GrantsiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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 GrantsiteHide

Localities for GrantsiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium)
      • Lavrion District slag localities
        • Agios Konstantinos [St Constantine] (Kamariza)
Kolitsch, U., Rieck, B., Brandstätter, F., Schreiber, F., Fabritz, K. H., Blaß, G. & Gröbner, J. (2014): Neufunde aus dem altem Bergbau und den Schlacken von Lavrion (II). Mineralien-Welt 25 (2), 82-95 (in German).; Koshlyakova, N.N., Zubkova, N.V., Pekov, I.V., Giester, G., Pushcharovsky, D.Yu., Chukanov, N.V., Voudouris, P., Magganas, A., Katerinopoulos, A. (2016): Crystal chemistry of a Ni-Mg-analogue of lyonsite from slags of Lavrion, Greece. Neues Jahrbuch für Mineralogie - Abhandlungen: Journal of Mineralogy and Geochemistry 193, 113-120.
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 Sub-district
Jeff Weismann
  • Utah
    • Grand Co.
      • Thompsons District (S. E. Thomsons)
        • Yellow Cat Mesa
          • Parco Mine Group
[UGMS Bull 117 Minerals and Mineral Localities of Utah; Am Min (1964) 49:1511-1526
Van King
Mineral and/or Locality  
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