Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat Articles
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Uroxite

This page is currently not sponsored. Click here to sponsor this page.
Formula:
[(UO2)2(C2O4)(OH)2(H2O)2]·H2O
Colour:
light yellow
Lustre:
Vitreous
Hardness:
2
Specific Gravity:
4.187 (Calculated)
Crystal System:
Monoclinic
Name:
Named for its composition uranyl (UR) oxalate (OX).
First uranyl oxalate found in nature.


Hide all sections | Show all sections

Classification of UroxiteHide

Approved, Pending publication
Approval Year:
2018
10.AB.

10 : ORGANIC COMPOUNDS
A : Salts of organic acids
B : Oxalates

Physical Properties of UroxiteHide

Vitreous
Transparency:
Transparent
Colour:
light yellow
Streak:
very pale yellow
Hardness:
Tenacity:
Brittle
Cleavage:
Perfect
perfect on {-102}, fair on {001}
Fracture:
Irregular/Uneven
Density:
4.187 g/cm3 (Calculated)
Comment:
dissolves in clerici solution

Optical Data of UroxiteHide

Type:
Biaxial (-)
RI values:
nα = 1.602(2) nβ = 1.660(2) nγ = 1.680(2)
2V:
Measured: 59° (1), Calculated: 59.1°
Max Birefringence:
δ = 0.078
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v, moderate
Pleochroism:
Non-pleochroic
Comments:
Y = b, Z ^ a = 35° in obtuse β

Chemical Properties of UroxiteHide

Formula:
[(UO2)2(C2O4)(OH)2(H2O)2]·H2O

Crystallography of UroxiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 5.5698(2) Å, b = 15.2877(6) Å, c = 13.3724(9) Å
β = 94.015(7)°
Ratio:
a:b:c = 0.364 : 1 : 0.875
Unit Cell V:
1135.86 ų
Z:
4
Morphology:
As prisms or blades, elongate and striated on [100], more or less flattened on
{010} and with steeply sloping terminations. Prism forms {010} and {001} terminated by {-102}

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
10.05(38)
5.00(100)
4.75(23)
4.43(51)
3.567(33)
3.341(29)
3.271(20)
2.623(28)

Occurrences of UroxiteHide

Paragenetic Mode(s):

Type Occurrence of UroxiteHide

General Appearance of Type Material:
Crystals occur as striated prisms or blades, up to about 1 mm long, with square to
rectangular cross-sections and steeply sloping terminations. Crystals typically
occur in radiating sprays.
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 73514 and 73515 (Burro mine), 73516 and 73517 (Markey mine)
Associated Minerals at Type Locality:

Synonyms of UroxiteHide

Common AssociatesHide

AbernathyiteK(UO2)(AsO4) · 3H2O
BitumenA sticky, black and highly viscous liquid or semi-solid form of petroleum.
FeynmaniteNa(UO2)(SO4)(OH)·3.5H2O
GypsumCaSO4 · 2H2O
QuartzSiO2

Related Minerals - Nickel-Strunz GroupingHide

10.AB.05HumboldtineFe2+(C2O4) · 2H2OMon. 2/m
10.AB.05LindbergiteMn2+(C2O4) · 2H2OMon. 2/m
10.AB.10GlushinskiteMg(C2O4) · 2H2OMon.
10.AB.15MoolooiteCu(C2O4) · 0.4H2OOrth.
10.AB.20StepanoviteNaMgFe3+(C2O4)3 · 8-9H2OTrig. 3m : P3c1
10.AB.25MinguzziteK3Fe3+(C2O4)3 · 3H2OMon. 2/m : P21/b
10.AB.30WheatleyiteNa2Cu(C2O4)2 · 2H2OTric.
10.AB.35ZhemchuzhnikoviteNaMgAl(C2O4)3 · 8H2OTrig. 3m : P3c1
10.AB.40WeddelliteCa(C2O4) · (2.5-x)H2OTet. 4/m : I4/m
10.AB.45WhewelliteCa(C2O4) · H2OMon. 2/m : P21/b
10.AB.50CaoxiteCa(C2O4) · 3H2OTric.
10.AB.55Oxammite(NH4)2(C2O4) · H2OOrth. 2 2 2 : P21 21 2
10.AB.60NatroxalateNa2(C2O4)Mon.
10.AB.65Coskrenite-(Ce)(Ce,Nd,La)2(C2O4)(SO4)2 · 12H2OTric.
10.AB.70Levinsonite-(Y)(Y,Nd,La)Al(C2O4)(SO4)2 · 12H2OMon. 2/m
10.AB.75Zugshunstite-(Ce)(Ce,Nd,La)Al(C2O4)(SO4)2 · 12H2OMon.
10.AB.80NovgorodovaiteCa2(C2O4)Cl2 · 2H2OMon. 2/m

Other InformationHide

Notes:
At room-temperature, insoluble in H2O and slowly soluble in dilute HCl.
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 UroxiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kampf, A.R., Plášil, J., Nash, B.P., Němec, I. and Marty, J. (2018) Uroxite, IMA 2018-100. CNMNC Newsletter No. 46, December 2018, page xxxx; Mineralogical Magazine, 82, xxxx–xxxx.

Internet Links for UroxiteHide

Localities for UroxiteHide

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.
USA (TL)
 
  • Colorado
    • San Miguel Co.
      • Slick Rock District
Kampf, A.R., Plášil, J., Nash, B.P., Němec, I. and Marty, J. (2018) Uroxite, IMA 2018-100. CNMNC Newsletter No. 46, December 2018, page xxxx; Mineralogical Magazine, 82, xxxx–xxxx.
  • Utah
    • San Juan Co.
      • White Canyon District
        • Red Canyon
Kampf, A.R., Plášil, J., Nash, B.P., Němec, I. and Marty, J. (2018) Uroxite, IMA 2018-100. CNMNC Newsletter No. 46, December 2018, page xxxx; Mineralogical Magazine, 82, xxxx–xxxx.
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2019, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: January 16, 2019 14:11:07 Page generated: December 23, 2018 14:41:08
Go to top of page