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Bauranoite

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Oktyabr'skoe Mo-U Deposit, Strel'tsovskoe Mo-U ore field, Krasnokamensk, Chitinskaya Oblast', Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia
© Pavel M. Kartashov

Show Bauranoite Photos (5)



Formula:
Ba(UO
 
2
)
 
2
(OH)
 
6
 · 1-2H
 
2
O
Colour:Reddish brownHardness:5
Name:For Barium and Uranium in the composition.
This page provides mineralogical data about Bauranoite.

Classification of Bauranoite

IMA status:Approved
Strunz 8th edition ID:4/H.06-30
Nickel-Strunz 10th (pending) edition ID:4.GB.20

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
G : Uranyl Hydroxides
B : With additional cations (K, Ca, Ba, Pb, etc.); with mainly UO2(O,OH)5 pentagonal polyhedra
Dana 8th edition ID:5.4.2.2

5 : OXIDES CONTAINING URANIUM OR THORIUM
4 : AX2O7·xH2O
Hey's CIM Ref.:7.16.16

7 : Oxides and Hydroxides
16 : Oxides of U
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Type Occurrence of Bauranoite

Type Locality:Oktyabr'skoe Mo-U Deposit, Strel'tsovskoe Mo-U ore field, Krasnokamensk, Chitinskaya Oblast', Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia
General Appearance of Type Material:Dense, fine-grained aggregates
Geological Setting of type material:In the oxidation zone of a U-Mo deposit, replacing pitchblende and replaced by uranophane
Associated Minerals at type locality:
UranophaneUraniniteProtasiteMetacalciouranoiteCalciouranoite

Physical Properties of Bauranoite

Diaphaneity (Transparency):Translucent
Colour:Reddish brown
Hardness (Mohs):5
Hardness (Vickers):VHN100=372 - 380 kg/mm2
Density (measured):5.283 - 5.42 g/cm3
X-Ray Powder Diffraction:
d-spacingIntensity
3.09 (10)
3.41 (7)
1.98 (6)
1.948 (6)
1.908 (6)
1.723 (6)
1.667 (6)
Comments:From type description.

Optical Data of Bauranoite

Type:Biaxial (-)
RI values: nα = 1.911 - 1.916 nγ = 1.920 - 1.932
2V:Measured: 81°
Maximum Birefringence:δ = 0.009 - 0.016

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r < v

Chemical Properties of Bauranoite

Formula:
Ba(UO
 
2
)
 
2
(OH)
 
6
 · 1-2H
 
2
O
Essential elements:Ba, H, O, U
All elements listed in formula:Ba, H, O, U
Analytical Data:Chemical analysis of material from the type locality
UO3 (63.74)
SiO2 (0.48)
PbO (0.53)
CaO (2.62)
BaO (21.21)
H2O (8.24)
CO2 (3.20)

sum 100.02 wt.-%
Empirical Formula:
BaO · 1.94UO
 
3
 · 4H
 
2
O
Common Impurities:Ca,Pb,Si

Relationship of Bauranoite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.GB.05Agrinierite
K
 
2
(Ca,Sr)(UO
 
2
)
 
3
O
 
3
(OH)
 
2
 · 5H
 
2
O
4.GB.05Compreignacite
K
 
2
(UO
 
2
)
 
6
O
 
4
(OH)
 
6
 · 7H
 
2
O
4.GB.05Rameauite
K
 
2
Ca(UO
 
2
)
 
6
(OH)
 
16
 · H
 
2
O
4.GB.10Becquerelite
Ca(UO
 
2
)
 
6
O
 
4
(OH)
 
6
 · 8H
 
2
O
4.GB.10Billietite
Ba(UO
 
2
)
 
6
O
 
4
(OH)
 
6
 · 4-8H
 
2
O
4.GB.10Protasite
Ba(UO
 
2
)
 
3
O
 
3
(OH)
 
2
 · 3H
 
2
O
4.GB.15Richetite
Pb(UO
 
2
)
 
4
O
 
5
 · 4H
 
2
O
4.GB.20Calciouranoite
(Ca,Ba,Pb)U
 
2
O
 
7
 · 5H
 
2
O
4.GB.20Metacalciouranoite
(Ca,Ba,Pb,K
 
2
)U
 
2
O
 
7
 · 2H
 
2
O
4.GB.25Fourmarierite
Pb(UO
 
2
)
 
4
O
 
3
(OH)
 
4
 · 4H
 
2
O
4.GB.30Wölsendorfite
(Pb,Ca)U
 
2
O
 
7
 · 2H
 
2
O
4.GB.35Masuyite
Pb(UO
 
2
)
 
3
O
 
3
(OH)
 
2
 · 3H
 
2
O
4.GB.40Metavandendriesscheite
PbU
 
7
O
 
22
 · nH
 
2
O n < 12
4.GB.40Vandendriesscheite
PbU
 
7
O
 
22
 · 12H
 
2
O
4.GB.45Vandenbrandeite
Cu(UO
 
2
)(OH)
 
4
4.GB.50Sayrite
Pb
 
2
(UO
 
2
)
 
5
O
 
6
(OH)
 
2
 · 4H
 
2
O
4.GB.55Curite
Pb
 
3
(UO
 
2
)
 
8
O
 
8
(OH)
 
6
 · 3H
 
2
O
4.GB.60Iriginite
(UO
 
2
)Mo
 
2
O
 
7
 · 3H
 
2
O
4.GB.65Uranosphaerite
Bi(UO
 
2
)O
 
2
(OH)
4.GB.70Holfertite
Ca
 
x
U
6+
2-x
Ti(O
 
8-x
OH
 
4x
) · 3H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
7.16.1Uraninite
UO
 
2
7.16.2Schoepite
(UO
 
2
)
 
8
O
 
2
(OH)
 
12
 · 12H
 
2
O
7.16.3Paraschoepite
UO
 
3
 · 2H
 
2
O
7.16.4Metaschoepite
UO
 
3
 · 1-2H
 
2
O
7.16.5Metastudtite
UO
 
4
 · 2H
 
2
O
7.16.6Studtite
[(UO
 
2
)(O
 
2
)(H
 
2
O)
 
2
] · H
 
2
O
7.16.7Ianthinite
U
4+
 
(UO
 
2
)
 
5
O
 
7
 · 10H
 
2
O
7.16.8Compreignacite
K
 
2
(UO
 
2
)
 
6
O
 
4
(OH)
 
6
 · 7H
 
2
O
7.16.9Vandenbrandeite
Cu(UO
 
2
)(OH)
 
4
7.16.10Roubaultite
Cu
 
2
(UO
 
2
)
 
3
(OH)
 
10
 · 5H
 
2
O
7.16.11Becquerelite
Ca(UO
 
2
)
 
6
O
 
4
(OH)
 
6
 · 8H
 
2
O
7.16.12Rameauite
K
 
2
Ca(UO
 
2
)
 
6
(OH)
 
16
 · H
 
2
O
7.16.13Agrinierite
K
 
2
(Ca,Sr)(UO
 
2
)
 
3
O
 
3
(OH)
 
2
 · 5H
 
2
O
7.16.14Protasite
Ba(UO
 
2
)
 
3
O
 
3
(OH)
 
2
 · 3H
 
2
O
7.16.15Billietite
Ba(UO
 
2
)
 
6
O
 
4
(OH)
 
6
 · 4-8H
 
2
O
7.16.17Metacalciouranoite
(Ca,Ba,Pb,K
 
2
)U
 
2
O
 
7
 · 2H
 
2
O
7.16.18Calciouranoite
(Ca,Ba,Pb)U
 
2
O
 
7
 · 5H
 
2
O
7.16.19Orthobrannerite
U
4+
 
U
6+
 
Ti
 
4
O
 
12
(OH)
 
2
7.16.20Thorutite
(Th,U,Ca)Ti
 
2
(O,OH)
 
6
7.16.21Davidite-(La)
(La,Ce)(Y,U,Fe)(Ti,Fe)
 
20
(O,OH)
 
38
7.16.22Davidite-(Ce)
(Ce,La)(Y,U,Fe)(Ti,Fe)
 
20
(O,OH)
 
38
7.16.23Brannerite
(U
4+
 
,REE,Th,Ca)(Ti,Fe
3+
 
,Nb)
 
2
(O,OH)
 
6
7.16.24Fourmarierite
Pb(UO
 
2
)
 
4
O
 
3
(OH)
 
4
 · 4H
 
2
O
7.16.25Richetite
Pb(UO
 
2
)
 
4
O
 
5
 · 4H
 
2
O
7.16.26Curite
Pb
 
3
(UO
 
2
)
 
8
O
 
8
(OH)
 
6
 · 3H
 
2
O
7.16.27Masuyite
Pb(UO
 
2
)
 
3
O
 
3
(OH)
 
2
 · 3H
 
2
O
7.16.28Vandendriesscheite
PbU
 
7
O
 
22
 · 12H
 
2
O
7.16.29Metavandendriesscheite
PbU
 
7
O
 
22
 · nH
 
2
O n < 12
7.16.30Sayrite
Pb
 
2
(UO
 
2
)
 
5
O
 
6
(OH)
 
2
 · 4H
 
2
O
7.16.31Wölsendorfite
(Pb,Ca)U
 
2
O
 
7
 · 2H
 
2
O
7.16.32Clarkeite
(Na,Ca,Pb)(UO
 
2
)O(OH) · 0-1H
 
2
O
7.16.33Uranosphaerite
Bi(UO
 
2
)O
 
2
(OH)

Other Names for Bauranoite

Synonyms:
IMA1971-052
Other Languages:
German:Bauranoit
Spanish:Bauranoita

Other Information

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

References for Bauranoite

Reference List:

- +
Rogova, V. P., Belova, L. N., Kiziyarov, G. N. and Kuznetsova, N. N. (1973): Bauranoite and metacaltsuranoite [metacalciouranoite] - new minerals of the group of hydrous uranium oxides. Zap. Vses. Mineral. Obshch. 102, 75-81 (in Russian). - American Mineralogist (1973), 58, 1111 (abstract).

Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 46.

Internet Links for Bauranoite

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    • Localities for Bauranoite

    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Russia
     
    • Eastern-Siberian Region
      • Transbaikalia (Zabaykalye)
        • Chitinskaya Oblast'
          • Krasnokamensk
            • Strel'tsovskoe Mo-U ore field
    		Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 46; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 20th Jun 2011 20:58:11
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