Orthobrannerite
A valid IMA mineral species - grandfathered
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About Orthobrannerite
Formula:
U4+U6+Ti4O12(OH)2
Colour:
Black
Lustre:
Adamantine
Hardness:
5½
Crystal System:
Orthorhombic
Name:
Named for the relation to brannerite. Although the name suggests it is the orthorhombic dimorph of brannerite, that is not true.
Type Locality:
Orthobrannerite-Thorutite Series. Compare 'UM1982-19-SiO:TiU'.
"First found in the weathering residue of a biotite pyroxene syenite in Yunan, China. It was later also identified, from its heat-treatment product, in an alkalic lamprophyre in Szechuan, China." (from Am. Mineral. abstract of original description).
"First found in the weathering residue of a biotite pyroxene syenite in Yunan, China. It was later also identified, from its heat-treatment product, in an alkalic lamprophyre in Szechuan, China." (from Am. Mineral. abstract of original description).
Unique Identifiers
Mindat ID:
3023
Long-form identifier:
mindat:1:1:3023:2
GUID
(UUID V4):
(UUID V4):
e40a0d0f-adbc-466f-9267-fae6e121f8dc
IMA Classification of Orthobrannerite
Approved, 'Grandfathered' (first described prior to 1959)
First published:
1978
Classification of Orthobrannerite
4.DH.05
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
H : With large (+- medium-sized) cations; sheets of edge-sharing octahedra
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
H : With large (+- medium-sized) cations; sheets of edge-sharing octahedra
8.2.7.1
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
2 : A2B2O6(O,OH,F)
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
2 : A2B2O6(O,OH,F)
7.16.19
7 : Oxides and Hydroxides
16 : Oxides of U
7 : Oxides and Hydroxides
16 : Oxides of U
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 |
---|---|---|
Obnr | 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 Orthobrannerite
Chemistry of Orthobrannerite
Mindat Formula:
U4+U6+Ti4O12(OH)2
Elements listed:
Crystallography of Orthobrannerite
Crystal System:
Orthorhombic
Cell Parameters:
a = 7.37 Å, b = 11.67 Å, c = 6.33 Å
Ratio:
a:b:c = 0.632 : 1 : 0.542
Unit Cell V:
544.43 ų (Calculated from Unit Cell)
Morphology:
Prismatic crystals, to 1.2 cm.
Comment:
Cell obtained after heating completely metamict type material to 1000°C.
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
4.87 Å | (7) |
3.89 Å | (8) |
3.17 Å | (10) |
2.45 Å | (9) |
2.29 Å | (5) |
1.659 Å | (9) |
1.203 Å | (6) |
Comments:
Obtained after heating completely metamict type material to 1000°C.
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 4b: Highly evolved igneous rocks | >3.0 |
35 : Ultra-alkali and agpaitic igneous rocks | |
Stage 7: Great Oxidation Event | <2.4 |
47a : [Near-surface hydration of prior minerals] | |
47f : [Uranyl (U⁶⁺) minerals] |
Type Occurrence of Orthobrannerite
Geological Setting of Type Material:
Weathering residue of a biotite pyroxene syenite in Yunan, China.
Reference:
X-ray Laboratory, Peking Institute of Uranium Geology and Xray Laboratory, Wuhan Geological College (1978) Orthobrannerite - A new mineral of the brannerite group. Acta Geologica Sinica: 52(3): 241-251.
Other Language Names for Orthobrannerite
German:Orthobrannerit
Spanish:Orthobrannerita
Relationship of Orthobrannerite to other Species
Forms a series with:
Common Associates
Related Minerals - Strunz-mindat Grouping
4.DH. | Fluornatropyrochlore | (Na,Pb,Ca,REE,U)2Nb2O6F |
4.DH. | Roméite Group | A2(Sb5+)2O6Z |
4.DH. | Hydroxykenomicrolite | (◻,Na,Sb3+)2Ta2O6(OH) |
4.DH. | Fluornatroroméite | (Na,Ca)2Sb2(O,OH)6F |
4.DH. | Oxyplumboroméite | Pb2Sb2O6O |
4.DH. | Cesiokenopyrochlore | ◻Nb2(O,OH)6(Cs,◻) |
4.DH. | Oxyyttrobetafite-(Y) | Y2Ti2O6O |
4.DH.05 | Brannerite | UTi2O6 |
4.DH.05 | Thorutite | (Th,U,Ca)Ti2(O,OH)6 |
4.DH.10 | Kassite | CaTi2O4(OH)2 |
4.DH.10 | Lucasite-(Ce) | CeTi2(O,OH)6 |
4.DH.15 va | Alumotungstite | ◻2W2O6(H2O) |
4.DH.15 | Bismutomicrolite (of Hogarth 1977) | |
4.DH.15 | Hydroplumboelsmoreite | (Pb,◻)(W,Fe3+)2O6 · H2O |
4.DH.15 | Hydropyrochlore | (H2O,◻)2Nb2(O,OH)6(H2O) |
4.DH.15 | Plumbomicrolite (of Hogarth 1977) | |
4.DH.15 | Stibiomicrolite (of Groat et al.) | |
4.DH.15 | Strontiopyrochlore (of Hogarth 1977) | A2Nb2(O,OH)6Z |
4.DH.15 | Fluornatromicrolite | (Na1.5Bi0.5)Ta2O6F |
4.DH.15 | Bismutopyrochlore (of Chukanov et al.) | (Bi,Ca,U,Pb)2-xNb2(O,OH)6(OH) |
4.DH.15 | Hydrokenoelsmoreite | ◻2W2O6(H2O) |
4.DH.15 | Fluorcalciomicrolite | (Ca,Na)2(Ta,Nb)2O6F |
4.DH.15 | Oxycalciobetafite | Ca2(Ti,Nb)2O6O |
4.DH.15 va | Yttromicrolite (of Hogarth) | (Ca,Y3+,U,Na)2-x(Ta,Nb,Ti,Fe3+)2O7 |
4.DH.15 | Oxynatropyrochlore | (Na,Ca,U)2Nb2O6(O,OH) |
4.DH.15 | Hydroxycalciopyrochlore | (Ca,Na,U,◻)2(Nb,Ti)2O6(OH) |
4.DH.15 | Fluorcalciopyrochlore | (Ca,Na)2(Nb, Ti)2O6F |
4.DH.15 | Oxycalciopyrochlore | Ca2Nb2O6O |
4.DH.15 | Fluorstrontiopyrochlore | (Sr,◻)2Nb2(O,OH)6F |
4.DH.15 | Oxyplumbopyrochlore | Pb2Nb2O6O |
4.DH.15 | Kenoplumbopyrochlore | (Pb,◻)Nb2O6(◻,O) |
4.DH.15 | Oxyyttropyrochlore-(Y) | (Y,◻)2Nb2O6O |
4.DH.15 | Fluorkenopyrochlore | (◻,Sr,Ce,Ca,Na)2(Nb,Ti)2O6F |
4.DH.15 | Oxyuranobetafite | (U,Ca,◻)2(Ti,Nb)2O6O |
4.DH.15 | Oxycalciomicrolite | Ca2Ta2O6O |
4.DH.15 | Oxystannomicrolite | Sn2Ta2O6O |
4.DH.15 | Kenoplumbomicrolite | (Pb,◻)2Ta2O6(◻,OH,O) |
4.DH.15 | Oxystibiomicrolite | (Sb3+,Ca)2Ta2O6O |
4.DH.15 | Hydromicrolite | (H2O,◻)2Ta2(O,OH)6(H2O) |
4.DH.15 | Hydrokenomicrolite | (◻,H2O)2Ta2(O,OH)6(H2O) |
4.DH.15 | Hydroxymanganopyrochlore | (Mn2+,Th,Na,Ca,REE)2(Nb,Ti)2O6(OH) |
4.DH.15 | Hydroxycalciomicrolite | Ca1.5Ta2O6(OH) |
4.DH.15 | Fluorplumbopyrochlore | (Pb,Y,Th,U,Na,Ca)2-x(Nb,Ti)2O6F |
4.DH.15 | Hydroxyplumbopyrochlore | (Pb1.5◻0.5)Nb2O6(OH) |
4.DH.15 | Oxynatromicrolite | (Na,Ca,U)2(Ta,Nb)2O6(O,F) |
4.DH.15 | Fluorhydropyrochlore | |
4.DH.15 | Hydroxykenoelsmoreite | (◻,Pb)2(W,Fe3+,Al)2(O,OH)6(OH) |
4.DH.15 | Hydrokenopyrochlore | (◻,x)2Nb2O6(H2O,Cs) |
4.DH.15 | Hydroxykenopyrochlore | (◻,Ce,Ba)2(Nb,Ti)2O6(OH,F) |
4.DH.15 | Hydroxynatropyrochlore | (Na,Ca,Ce)2Nb2O6(OH) |
4.DH.15 | Hydroxynatromicrolite | (Na,Bi3+,◻)2Ta2O6(OH) |
4.DH.15 | Unnamed (Sb-analogue of Hydroxymanganopyrochlor) | (Mn,Ca,Y)2(Sb,Ti)2O6(OH) |
4.DH.15 | Oxybismutomicrolite | (Bi1.33◻0.67)Σ2Ta2O6O |
4.DH.20 | Bindheimite | Pb2Sb2O6O |
4.DH.20 | Hydroxycalcioroméite | (Ca,Sb3+)2(Sb5+,Ti)2O6(OH) |
4.DH.20 | Monimolite | Pb2Sb5+2O7 |
4.DH.20 | Cuproroméite | Cu2Sb2(O,OH)7 |
4.DH.20 | Stetefeldtite | Ag2Sb2(O,OH)7 |
4.DH.20 | Stibiconite | Sb3+Sb5+2O6(OH) |
4.DH.20 | Fluorcalcioroméite | (Ca,Na,◻)2Sb5+2(O,OH)6F |
4.DH.20 | Oxycalcioroméite | Ca2Sb2O6O |
4.DH.20 | Hydroxyferroroméite | (Fe2+1.5◻0.5)Sb5+2O6(OH) |
4.DH.25 | Rosiaite | PbSb5+2O6 |
4.DH.30 | Zirconolite | CaZrTi2O7 |
4.DH.30 | Laachite | (Ca,Mn)2Zr2Nb2TiFeO14 |
4.DH.30 | Nöggerathite-(Ce) | (Ce,Ca)2Zr2(Nb,Ti)(Ti,Nb)2Fe2+O14 |
4.DH.30 | Stefanweissite | (Ca,REE)2Zr2(Nb,Ti)(Ti,Nb)2Fe2+O14 |
4.DH.35 | Liandratite | U(Nb,Ta)2O8 |
4.DH.35 | Petscheckite | UFe(Nb,Ta)2O8 |
4.DH.40 | Ingersonite | Ca3Mn2+Sb5+4O14 |
4.DH.45 | Pittongite | Na0.22(W,Fe3+)(O,OH)3 · 0.44H2O |
4.DH.50 | Tazzoliite | Ba4-xNaxTi2Nb3SiO17[PO2(OH)2]x(OH)(1-2x) |
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 Orthobrannerite
mindat.org URL:
https://www.mindat.org/min-3023.html
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References for Orthobrannerite
Localities for Orthobrannerite
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).
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.
All localities listed without proper references should be considered as questionable.
China | |
X-ray Laboratory et al. (1978) | |
X-ray Laboratory et al. (1978) | |
Italy | |
| Piccoli et al. (2007) |
Mexico | |
| Fayek et al. (2005) |
Norway | |
| Viola et al. (2008) |
Papua New Guinea | |
| Sykora et al. (2018) |
Slovakia | |
| Grecula (1995) |
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Brusson Mine, Brusson, Aosta Valley, Italy