Fulbrightite
A valid IMA mineral species
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About Fulbrightite
Formula:
Ca(VO)2(AsO4)2 · 4H2O
Colour:
Shades of light green
Lustre:
Vitreous, Pearly
Hardness:
2½
Specific Gravity:
3.12
Crystal System:
Triclinic
Name:
Named in honor of Jess W. Fulbright Jr. (1958-), of Nucla, Colorado, Safety Director for Energy Fuels Inc., a company involved in the acquisition, exploration, development and mining of uranium properties in the western USA. He provided mine access and logistical support for the scientific study and collecting of secondary uranium and vanadium minerals in deposits in the Uravan Mineral Belt.
Unique Identifiers
Mindat ID:
53867
Long-form identifier:
mindat:1:1:53867:9
GUID
(UUID V4):
(UUID V4):
a8f2157c-63ce-4866-9bc5-3f39afc61908
IMA Classification of Fulbrightite
Approved
Approval year:
2019
First published:
2020
Classification of Fulbrightite
8.CJ.35
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
J : With only large cations
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
J : With only large cations
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 |
|---|---|---|
| Fbg | 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 Fulbrightite
Vitreous, Pearly
Colour:
Shades of light green
Streak:
Colorless to pale green
Hardness:
2½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
(001) perfect, (100) and (010) excellent, (110) and (110) fair
(001) perfect, (100) and (010) excellent, (110) and (110) fair
Fracture:
Irregular/Uneven, Step-Like
Comment:
Brittle, but slightly flexible in thin plates.
Fracture is stepped, irregular, and curved.
Fracture is stepped, irregular, and curved.
Density:
3.12(2) g/cm3 (Measured)
Optical Data of Fulbrightite
Type:
Biaxial (-)
RI values:
nα = 1.675(3) nβ = 1.718(3) nγ = 1.718(3)
2V:
Measured: 5°
Max Birefringence:
δ = 0.043
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:
High
Pleochroism:
Weak
Comments:
X colorless, Y and Z pale green (X < Y = Z)
Chemistry of Fulbrightite
Mindat Formula:
Ca(VO)2(AsO4)2 · 4H2O
Crystallography of Fulbrightite
Crystal System:
Triclinic
Class (H-M):
1 - Pedial
Space Group:
P1
Cell Parameters:
a = 6.434(8) Å, b = 6.480(8) Å, c = 6.718(8) Å
α = 107.90(6)°, β = 94.06(4)°, γ = 90.06(3)°
α = 107.90(6)°, β = 94.06(4)°, γ = 90.06(3)°
Ratio:
a:b:c = 0.993 : 1 : 1.037
Unit Cell V:
265.8 ų
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 6.51 Å | (52) |
| 3.221 Å | (100) |
| 3.085 Å | (16) |
| 2.893 Å | (15) |
| 2.823 Å | (12) |
| 2.277 Å | (23) |
| 1.619 Å | (20) |
| 1.450 Å | (21) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47d : [Arsenates, antimonates, selenates, bismuthinates] | |
| 47e : [Vanadates, chromates, manganates] |
Type Occurrence of Fulbrightite
General Appearance of Type Material:
Rosettes of roughly square (pseudotetragonal) plates.
Place of Conservation of Type Material:
Cotype material is deposited in the mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue numbers 64513, 65555 and 65559.
Reference:
Kampf, A.R., Cooper, M.A., Nash, B.P., Marty, J., Adams, P.M., Plášil, J., Sejkora, J. (2020) Fulbrightite, the Arsenate Analog of Sincosite. The Canadian Mineralogist: 58(5): 663–671.
Synonyms of Fulbrightite
Related Minerals - Strunz-mindat Grouping
| 8.CJ. | Sainfeldite | Ca5(AsO4)2(AsO3OH)2 · 4H2O |
| 8.CJ. | Caesiumpharmacosiderite | CsFe4[(AsO4)3(OH)4] · 4H2O |
| 8.CJ. | Jeankempite | Ca5(AsO4)2(HAsO4)2 · 7H2O |
| 8.CJ. | Airdite | Sr(V4+O)2(PO4)2 · 4H2O |
| 8.CJ. | Dobšináite | Ca2Ca(AsO4)2 · 2H2O |
| 8.CJ.05 | Stercorite | (NH4)Na(PO3OH) · 4H2O |
| 8.CJ.10 | Mundrabillaite | (NH4)2Ca(PO3OH)2 · H2O |
| 8.CJ.10 | Swaknoite | (NH4)2Ca(PO3OH)2 · H2O |
| 8.CJ.15 | Nabaphite | NaBaPO4 · 9H2O |
| 8.CJ.15 | Nastrophite | Na(Sr,Ba)PO4 · 9H2O |
| 8.CJ.20 | Haidingerite | CaHAsO4 · H2O |
| 8.CJ.25 | Vladimirite | Ca4(AsO4)2(AsO3OH) · 4H2O |
| 8.CJ.25 | Rhabdophane-(Y) | YPO4 · H2O |
| 8.CJ.27 | Churchite-(Dy) | (Dy,Sm,Gd,Nd)PO4 · 2H2O |
| 8.CJ.30 | Ferrarisite | Ca5(AsO4)2(HAsO4)2 · 9H2O |
| 8.CJ.35 | Machatschkiite | (Ca,Na)6(AsO4)(HAsO4)3(PO4,SO4) · 15H2O |
| 8.CJ.40 | Phaunouxite | Ca3(AsO4)2 · 11H2O |
| 8.CJ.40 | Rauenthalite | Ca3(AsO4)2 · 10H2O |
| 8.CJ.45 | Brockite | (Ca,Th,Ce)PO4 · H2O |
| 8.CJ.45 | Grayite | (Th,Pb,Ca)(PO4) · H2O |
| 8.CJ.45 | Rhabdophane-(Ce) | Ce(PO4) · 0.6H2O |
| 8.CJ.45 | Rhabdophane-(La) | La(PO4) · H2O |
| 8.CJ.45 | Rhabdophane-(Nd) | Nd(PO4) · H2O |
| 8.CJ.45 | Tristramite | (Ca,U,Fe)(PO4,SO4) · 2H2O |
| 8.CJ.45 | Smirnovskite | (Th,Ca)PO4 · nH2O |
| 8.CJ.45 | Štěpite | U(AsO3OH)2 · 4H2O |
| 8.CJ.47 | Vysokýite | U4+[AsO2(OH)2]4 · 4H2O |
| 8.CJ.50 | Ardealite | Ca2(PO3OH)(SO4) · 4H2O |
| 8.CJ.50 | Brushite | Ca(PO3OH) · 2H2O |
| 8.CJ.50 | Churchite-(Y) | Y(PO4) · 2H2O |
| 8.CJ.50 | Pharmacolite | Ca(HAsO4) · 2H2O |
| 8.CJ.50 | Churchite-(Nd) | Nd(PO4) · 2H2O |
| 8.CJ.55 | Mcnearite | NaCa5(AsO4)(HAsO4)4 · 4H2O |
| 8.CJ.60 | Dorfmanite | Na2(PO3OH) · 2H2O |
| 8.CJ.65 | Sincosite | Ca(VO)2(PO4)2 · 5H2O |
| 8.CJ.65 | Bariosincosite | Ba(VO)2(PO4)2 · 4H2O |
| 8.CJ.70 | Catalanoite | Na2(PO3OH) · 8H2O |
| 8.CJ.75 | Guérinite | Ca6(HAsO4)3(AsO4)2 · 10.5H2O |
| 8.CJ.85 | Ningyoite | (U,Ca,Ce)2(PO4)2 · 1-2H2O |
Other Information
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 Fulbrightite
mindat.org URL:
https://www.mindat.org/min-53867.html
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References for Fulbrightite
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2019) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) NEWSLETTER 51. European Journal of Mineralogy, 31 (5-6) 1099-1104 doi:10.1127/ejm/2019/0031-2894
Localities for Fulbrightite
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.
Czech Republic | |
| Jan Hloušek Collection |
USA | |
| Collected by Al Wilkins |
| Miyawaki et al. (2019) +2 other references |
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Packrat Mine, Beaver Mesa, Gateway Mining District, Mesa County, Colorado, USA