Grantsite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Grantsite
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.
Unique Identifiers
Mindat ID:
1739
Long-form identifier:
mindat:1:1:1739:4
GUID
(UUID V4):
(UUID V4):
3d1983d3-f8bc-4d8c-92be-fb05b1657fe6
IMA Classification of Grantsite
Approved
IMA Formula:
(Na,Ca)2+x(V5+,V4+)6O16 · 4H2O
First published:
1964
Classification of Grantsite
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
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
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
21 : Vanadates (and vanadates with arsenate or phosphate)
2 : Vanadates of Mg, Ca, Sr or Ba
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Gs | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Grantsite
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) 2.95 g/cm3 (Calculated)
Optical Data of Grantsite
Type:
Biaxial (-)
RI values:
nα = 1.820(1)
Max Birefringence:
δ = 1.820
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
none
Optical Extinction:
X = normal to the blade, Y = parallel to the intermediate dimension of the blade, Z = b parallel to the length of the blade
Pleochroism:
Strong
Comments:
X = green, Y = greenish brown, Z = brown
Comments:
Length slow.
β > 2.0, γ > 2.0
Absorption: Z > Y > X.
β > 2.0, γ > 2.0
Absorption: Z > Y > X.
Chemistry of Grantsite
Mindat Formula:
(Na,Ca)2+x(V5+,V4+)6O16 · 4H2O
Crystallography of Grantsite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Setting:
P21/m
Cell Parameters:
a = 12.429 Å, b = 3.604 Å, c = 17.542 Å
β = 95.33°
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 Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 12.4 Å | (18) |
| 8.74 Å | (100) |
| 4.37 Å | (10) |
| 3.606 Å | (28) |
| 3.008 Å | (14) |
| 2.869 Å | (12) |
| 2.280 Å | (11) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere | <0.6 |
| 53 : Other minerals with taphonomic origins | <0.4 |
| Stage 10b: Anthropogenic minerals | <10 Ka |
| 56 : Slag and smelter minerals (see also #51 and #55) |
Type Occurrence of Grantsite
Co-Type Localities:
General Appearance of Type Material:
Dark olive green to greenish black aggregates of microscopic fibrous or bladed crystals.
Geological Setting of Type Material:
Oxidized "corvusite-type" vanadiferous uranium ores. In sandstones and limestone.
Reference:
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.
Other Language Names for Grantsite
Relationship of Grantsite to other Species
Member of:
Other Members of this group:
| Barnesite | (Na,Ca)V6O16 · 3H2O | Mon. 2/m : P2/m |
| Hendersonite | (Ca,Sr)1.3V6O16 · 6H2O | Orth. |
| Hewettite | CaV6O16 · 9H2O | Mon. 2/m : P21/m |
| Metahewettite | CaV6O16 · 3H2O | Mon. 2/m |
Common Associates
Associated Minerals Based on Photo Data:
| 2 photos of Grantsite associated with Tyuyamunite | Ca(UO2)2(VO4)2 · 5-8H2O |
| 1 photo of Grantsite associated with Calcite | CaCO3 |
| 1 photo of Grantsite associated with Häggite | V3+V4+O2(OH)3 |
| 1 photo of Grantsite associated with Navajoite | Fe3+V5+9O24 · 12H2O |
| 1 photo of Grantsite associated with Corvusite | (Na,K,Ca,Mg)2(V5+,V4+,Fe2+)8O20 · 6-10H2O |
| 1 photo of Grantsite associated with Montroseite | (V3+,Fe3+)O(OH) |
| 1 photo of Grantsite associated with Sandstone |
Related Minerals - Strunz-mindat Grouping
| 4.HG. | Calciodelrioite | Ca(VO3)2 · 4H2O |
| 4.HG. | Trebiskyite | Na3Mg2[TiV9O28] · 22H2O |
| 4.HG.05 | Fervanite | Fe3+4V5+4O16 · 5H2O |
| 4.HG.10 | Huemulite | Na4Mg(V10O28) · 24H2O |
| 4.HG.15 | Vanalite | NaAl8V10O38 · 30H2O |
| 4.HG.20 | Simplotite | CaV4+4O9 · 5H2O |
| 4.HG.25 | Vanoxite | V4+4V5+2O13 · 8H2O |
| 4.HG.30 | Navajoite | Fe3+V5+9O24 · 12H2O |
| 4.HG.35 | Delrioite | CaSr(V2O6)(OH)2 · 3H2O |
| 4.HG.40 | Metadelrioite | CaSr(V2O6)(OH)2 |
| 4.HG.45 | Barnesite | (Na,Ca)V6O16 · 3H2O |
| 4.HG.50 | Hendersonite | (Ca,Sr)1.3V6O16 · 6H2O |
| 4.HG.60 | Lenoblite | V4+2O4 · 2H2O |
| 4.HG.65 | Satpaevite | Al12V4+2V5+6O37 · 30H2O |
| 4.HG.70 | Pandoraite-Ba | BaV4+5V5+2O16 · 3H2O |
| 4.HG.70 | Pandoraite-Ca | CaV4+5V5+2O16 · 3H2O |
Other Information
Notes:
Finely divided fibers of grantsite change from dark olive green to orange red in HCl, and dissoive to form a yellow to orange solution.
When heated in an open tube in a Bunsen burner flame, grantsite fuses easily-probably about 2 on the fusibility scale-and forms a dark red globule with metallic steely luster.
When heated in an open tube in a Bunsen burner flame, grantsite fuses easily-probably about 2 on the fusibility scale-and forms a dark red globule with metallic steely luster.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Grantsite
mindat.org URL:
https://www.mindat.org/min-1739.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Grantsite
Reference List:
Weeks, A. D., Lindberg, M. L., Truesdell, A. H., Meyrowitz, R. (1964) Grantsite, a new hydrated sodium calcium vanadate from New Mexico, Colorado, and Utah. American Mineralogist, 49 (11-12) 1511-1526
Localities for Grantsite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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).
All localities listed without proper references should be considered as questionable.
Greece | |
| Kolitsch et al. (2014) +1 other reference |
USA | |
| Weeks et al. (1964) +1 other reference |
| Weeks et al. (1964) +1 other reference | |
| Kampf et al. (2019) |
| Weeks et al. (1964) +1 other reference |
| Northrop et al. (1996) | |
| Jeff Weismann |
| Weeks et al. (1964) +1 other reference |
| King (n.d.) | |
| ID confirmed by J. Marty and T. Kampf ... |
Quick NavTopAbout GrantsiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence Other LanguagesRelationshipsCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
F-33 Mine, East Grants Ridge Mining District, Cibola County, New Mexico, USA