Nielsbohrite (original) (raw)

A valid IMA mineral species

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About NielsbohriteHide

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Formula:

K(UO2)3(AsO4)(OH)4 · H2O

Specific Gravity:

5.45 - 5.65

Crystal System:

Orthorhombic

Name:

After Niels Henrik David Bohr (Copenhagen 7 October 1885 - idem 18 November 1962), Danish physicist. He contributed to understanding atomic structure and quantum mechanics. He received the Nobel Prize in Physics in 1922. Bohr mentored and collaborated with many of the top physicists of the century at his institute in Copenhagen. He was also part of the team of physicists working on the Manhattan Project.

This page provides mineralogical data about Nielsbohrite.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:32208:7

4411f29e-5c9e-4e8d-897b-03e2e6764546

IMA Classification of NielsbohriteHide

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IMA Formula:

(K,U,◻)(UO2)3(AsO4)(OH)4 · H2O

Type description reference:

Walenta, K., Hatert, F., Theye, Th., Lissner, F., Roeller, K. (2009): Nielsbohrite, a new potassium uranyl arsenate from the uranium deposit of Menzenschwand in the Southern Black Forest, Germany. European Journal of Mineralogy, 21, 515-520.

Classification of NielsbohriteHide

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8.ED.20

8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
D : Unclassified

42.13.10.

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
13 : Miscellaneous

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Symbol Source Reference
Nbr 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 NielsbohriteHide

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Fracture:

Irregular/Uneven

Density:

5.45 - 5.65 g/cm3 (Measured)

Optical Data of NielsbohriteHide

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RI values:

_n_α = 1.756(2) _n_β = 1.764(2) _n_γ = 1.765(2)

2V:

Measured: 35° (5), Calculated: 39°

δ = 0.009

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Pleochroism:

Non-pleochroic

Chemistry of NielsbohriteHide

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Mindat Formula:

K(UO2)3(AsO4)(OH)4 · H2O

Crystallography of NielsbohriteHide

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Crystal System:

Orthorhombic

Class (H-M):

m m m _(_2/_m_2/_m_2/m ) - Dipyramidal

Cell Parameters:

a = 8.193(3) Å, b = 11.430(4) Å, c = 13.500(5) Å

Ratio:

a:b:c = 0.717 : 1 : 1.181

Morphology:

Rhombohedron-like crystals. Forms include {001}, {100} or {010}, and {210} or {120}.

Crystal StructureHide

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ID Species Reference Link Year Locality Pressure (GPa) Temp (K)
0007287 Nielsbohrite Walenta K, Hatert F, Theye T, Lissner F, Roller K (2009) Nielsbohrite, a new potassium uranyl arsenate from the uranium deposit of Menzenschwand, southern Black Forest, Germany European Journal of Mineralogy 21 515-520 2009 Menzenschwand, southern Black Forest, Germany 0 293

CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

d-spacing Intensity
6.71 Å (80)
6.03 Å (100)
3.78 Å (70)
3.33 Å (80)
2.96 Å (60)
2.88 Å (40)
2.63 Å (50)
1.942 Å (50)

Geological EnvironmentHide

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Type Occurrence of NielsbohriteHide

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General Appearance of Type Material:

Euhedral rhombohedron-like crystals to 0.15 mm in size, often altered.

Place of Conservation of Type Material:

Staatliches Museum fur Naturkunde in Stuttgart, Germany, and the single crystal used for the structural study at the Laboratory of Mineralogy, University of Lie`ge, Belgium (no 20355).

Geological Setting of Type Material:

Oxidized uranium deposit.

Associated Minerals at Type Locality:

Reference:

Walenta, K., Hatert, F., Theye, Th., Lissner, F., Roeller, K. (2009): Nielsbohrite, a new potassium uranyl arsenate from the uranium deposit of Menzenschwand in the Southern Black Forest, Germany. European Journal of Mineralogy, 21, 515-520.

Synonyms of NielsbohriteHide

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Related Minerals - Strunz-mindat GroupingHide

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8.ED.05 Moreauite Al3(UO2)(PO4)3(OH)2 · 13H2O Mon. 2/m : _P_21/b
8.ED.10 Asselbornite Pb(BiO)3(UO2)4(AsO4)2(OH)7 · 4H2O Iso.
8.ED.10 Metalodèvite Zn(UO2)2(AsO4)2 · 10H2O Tet. 4/m : _P_42/m
8.ED.10 Šreinite Pb(BiO)3(UO2)4(PO4)2(OH)7 · 4H2O Iso. m_3_m _(_4/_m_32/m ) : I m_3_m
8.ED.15 Kamitugaite PbAl[(UO2)5(PO4)2.38(AsO4)0.62O2(OH)2] · 11.5H2O Tric. 1 : _P_1

Fluorescence of NielsbohriteHide

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Other InformationHide

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Health Risks:

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

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References for NielsbohriteHide

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Reference List:

Walenta, K., Hatert, F., Theye, Th., Lissner, F., Roeller, K. (2009): Nielsbohrite, a new potassium uranyl arsenate from the uranium deposit of Menzenschwand in the Southern Black Forest, Germany. European Journal of Mineralogy, 21, 515-520.

Localities for NielsbohriteHide

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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

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- 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). 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.

Germany (TL)
Baden-Württemberg Freiburg Region Waldshut St Blasien Menzenschwand ⓘ Krunkelbach Valley Uranium deposit (TL) Walenta et al. (2009)