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Oppenheimerite

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About OppenheimeriteHide

Dr. J. Robert Oppenheimer
Formula:
Na2(UO2)(SO4)2·3H2O
Colour:
Pale greenish-yellow
Lustre:
Vitreous
Specific Gravity:
3.360 (Calculated)
Crystal System:
Triclinic
Name:
Named by Anthony R. Kampf, J. Plášil, A.V. Kasatkin, J. Marty, and J. Čejka in 2015 Dr. Julius Robert Oppenheimer (22 April 1904, New York Ciry, New York, USA – 18 February 1967,Princeton, New Jersey), theoretical physicist the University of California, Berkeley, World War II head of the Los Alamos Laboratory during the Manhatten Project, and later director of the Institute for Advanced Study in Princeton. He made significant advances in atomic physics, fusion, astrophysics, and quantum mechanics.
New structure type. Structurally somewhat similar to fermiite and related to bobcookite.

Chemically related minerals: fermiite, klaprothite, ottohahnite, péligotite; also basic salts plášilite and natrozippeite; and sulfate-hydrosulfates belakovskiite and meisserite.

As typical for uranyl sulfates, U polyhedra are square pentagonal bipyramids, with U atoms surrounded by 7 O atoms (two apical bonds of the bipyramid constitute the uranyl group). There are infinite chains formed by linking the adjacent bipyramids by two bridging sulfate groups. In oppenheimerite the chain of [(UO2)(SO4)2(H2O)]2- composition is parallel to [111]. The chains are linked through 2 different Na–O polyhedra (in fermiite there are 5 such polyhedra types).


Classification of OppenheimeriteHide

Approved
Approval Year:
2014
First Published:
2015

Physical Properties of OppenheimeriteHide

Vitreous
Transparency:
Transparent
Colour:
Pale greenish-yellow
Streak:
White
Tenacity:
Sectile
Cleavage:
Distinct/Good
Three good cleavages, {110}, {011} and {101}
Fracture:
Irregular/Uneven
Comment:
slightly sectile
Density:
3.360 g/cm3 (Calculated)

Optical Data of OppenheimeriteHide

Type:
Biaxial (+)
RI values:
nα = 1.537(1) nβ = 1.555(1) nγ = 1.594(1)
2V:
Measured: 72° , Calculated: 70°
Max Birefringence:
δ = 0.057
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
r > v, moderate, inclined
Pleochroism:
Visible
Comments:
X very pale greenish yellow, Y pale greenish yellow, Z greenish yellow; X < Y < Z

Chemical Properties of OppenheimeriteHide

Formula:
Na2(UO2)(SO4)2·3H2O
IMA Formula:
Na2(UO2)(SO4)2 · 3H2O

Crystallography of OppenheimeriteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Setting:
P1
Cell Parameters:
a = 7.9576(6) Å, b = 8.1952(6) Å, c = 9.8051(7) Å
α = 65.967(5)°, β = 70.281(5)°, γ = 84.516(6)°
Ratio:
a:b:c = 0.971 : 1 : 1.196
Unit Cell V:
65.967 ų
Z:
2
Morphology:
Prisms

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.29(31)
6.85(73)
5.39(47)
4.253(29)
3.700(47)
3.257(100)
2.669(33)
2.346(28)
Comments:
From Type Description

Type Occurrence of OppenheimeriteHide

General Appearance of Type Material:
crystals are elongated on [111] and occur in subparallel intergrowths, up to several millimeters long; forms observed: {100},
{010}, {001}, {101}, {011}, {110}, {10_1}.
Place of Conservation of Type Material:
Cotype material is deposited in the collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue numbers 65549, 65550 and 65551, and of the Fersman Mineralogical Museum of the Russian Aca
Geological Setting of Type Material:
As a secondary alteration phase
Associated Minerals at Type Locality:

Synonyms of OppenheimeriteHide

Fluorescence of OppenheimeriteHide

Bright greenish-white fluorescence.

Other InformationHide

Notes:
Easily soluble in RT H2O; Raman bands [cm-1]: 3526, 3400, 3218 (O–H stretching); weak with shoulders: 1215,
1156, 1060 [ν3 sulfate antisymmetric stretching]; strong:
1013, 1002, 986, 970 [ν1 sulfate symmetric stretching]; very strong 841 with 825sh [ν1 uranyl symmetric stretching]; weak 651, 603) [ν4(δ) sulfate bending]; 459, 378 [ν2(δ) sulfate bending]; 207 [ν2(δ) of uranyl groups]; below 200 (lattice vibrations)
Health Risks:
Radioactive

References for OppenheimeriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kampf, A.R., Plášil, J., Kasatkin, A.V., Marty, J. and Čejka, J. (2015) Oppenheimerite, IMA 2014-073. CNMNC Newsletter No. 23, February 2015, page 55: Mineralogical Magazine: 79: 51-58.
Kampf, A.R., Plášil, J., Kasatkin, A.V., Marty, J., Čejka, J. (2015) Fermiite, Na4(UO2)(SO4)3·3H2O and oppenheimerite, Na2(UO2)(SO4)2·3H2O, two new uranyl sulfate minerals from the Blue Lizard mine, San Juan County, Utah, USA. Mineralogical Magazine: 79: 1123-1142.

Internet Links for OppenheimeriteHide

Localities for OppenheimeriteHide

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)
 
  • Utah
    • San Juan Co.
      • White Canyon District
        • Red Canyon
Kampf, A.R., Plášil, J., Kasatkin, A.V., Marty, J. and Čejka, J. (2015) Oppenheimerite, IMA 2014-073. CNMNC Newsletter No. 23, February 2015, page 55; Mineralogical Magazine, 79, 51-58; Kampf, A.R., Plášil, J., Kasatkin, A.V., Marty, J., Čejka, J. (2015): Fermiite, Na4(UO2)(SO4)3·3H2O and oppenheimerite, Na2(UO2)(SO4)2·3H2O, two new uranyl sulfate minerals from the Blue Lizard mine, San Juan County, Utah, USA. Mineralogical Magazine, 79, 1123-1142
Kampf, A.R., Plášil, J., Kasatkin, A.V., Marty, J., Čejka, J. and Lapčák, L. (2015) Shumwayite, IMA 2015-058. CNMNC Newsletter No. 27, October 2015, page 1228; Mineralogical Magazine, 79, 1229–1236.
Mineral and/or Locality  
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