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Bismutostibiconite

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Formula:
Bi(Sb
5+
 
,Fe
3+
 
)
 
2
O
 
7
System:IsometricColour:Yellow to yellow-brown, ...
Hardness:4 - 5
Name:Named as a bismuth-containing member of the stibiconite group.
A variety of Roméite Group

Originally described by Walenta (1983). The chemical data are considered inadequate owing to a standardless energy-dispersion spectroscopy (EDS), with all Sb assumed to be pentavalent, and results of the analysis normalised to 100%. It probably is “bismutoroméite”.
The type material is in need of a chemical and structural investigation.

Classification of Bismutostibiconite

IMA status:Discredited 2010
Strunz 8th edition ID:4/C.11-60
Nickel-Strunz 10th (pending) edition ID:4.DH.20

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
Dana 8th edition ID:44.1.1.6

44 : ANTIMONATES
1 : A2X2O6(O,OH,F)
Hey's CIM Ref.:7.13.9

7 : Oxides and Hydroxides
13 : Oxides of As, Sb and Bi
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Type Occurrence of Bismutostibiconite

Co-type Localities:Neubulach, Calw, Black Forest, Baden-Württemberg, Germany
Clara Mine, Rankach valley, Oberwolfach, Wolfach, Black Forest, Baden-Württemberg, Germany
General Appearance of Type Material:Earthy crusts
Geological Setting of type material:Alteration product of bismuthian fahlore
Associated Minerals at type locality:
Tennantite-Tetrahedrite SeriesPreisingeriteOliveniteMalachiteChalcopyrite
BismutiteBeyeriteAzuriteAtelestite

Physical Properties of Bismutostibiconite

Diaphaneity (Transparency):Transparent, Opaque
Colour:Yellow to yellow-brown, rarely greenish; brownish in transmitted light
Hardness (Mohs):4 - 5
Density (calculated):7.38 g/cm3

Crystallography of Bismutostibiconite

Crystal System:Isometric
Class (H-M):m3m (4/m 3 2/m) - Hexoctahedral
Space Group:Fd3m {F41/d 3 2/m}
Cell Parameters:a = 10.38Å
Unit Cell Volume:V 1,118.39 ų (Calculated from Unit Cell)
Z:8
Morphology:Always anhedral, forming earthy crusts

Optical Data of Bismutostibiconite

Type:Isotropic
RI values: n = 2.09
Maximum Birefringence:δ = 0.000 - Isotropic minerals have no birefringence
Surface Relief:Very High

Chemical Properties of Bismutostibiconite

Formula:
Bi(Sb
5+
 
,Fe
3+
 
)
 
2
O
 
7
Essential elements:Bi, O, Sb
All elements listed in formula:Bi, Fe, O, Sb
Analytical Data:Electron microprobe analysis of material from Clara Mine, Germany
Fe2O3  (6.9)
Bi2O3 (49.2)
Sb2O3 (43.9)

sum   100.0 wt.-%
Empirical Formula:
Bi
 
1.31
(Sb
5+
1.69
Fe
3+
0.54
)
 
=2.23
O
 
7

Relationship of Bismutostibiconite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.DH.05Brannerite
(U
4+
 
,REE,Th,Ca)(Ti,Fe
3+
 
,Nb)
 
2
(O,OH)
 
6
4.DH.05Orthobrannerite
U
4+
 
U
6+
 
Ti
 
4
O
 
12
(OH)
 
2
4.DH.05Thorutite
(Th,U,Ca)Ti
 
2
(O,OH)
 
6
4.DH.10Kassite
CaTi
 
2
O
 
4
(OH)
 
2
4.DH.10Lucasite-(Ce)
CeTi
 
2
(O,OH)
 
6
4.DH.15Bariomicrolite (of Hogarth 1977)
4.DH.15Bariopyrochlore (of Hogarth 1977)
4.DH.15Betafite (of Hogarth 1977)
4.DH.15Bismutomicrolite (of Hogarth 1977)
4.DH.15Calciobetafite (of Mazzi & Munno)
4.DH.15Ceriopyrochlore (of Hogarth 1977)
4.DH.15Cesstibtantite
4.DH.15Jixianite
Pb(W,Fe
3+
 
)
 
2
(O,OH)
 
7
4.DH.15Hydropyrochlore
(H
 
2
O,□)
 
2
Nb
 
2
(O,OH)
 
6
(H
 
2
O)
4.DH.15Natrobistantite
4.DH.15Plumbopyrochlore (of Skorobogatova et al.)
4.DH.15Plumbomicrolite (of Hogarth 1977)
4.DH.15Plumbobetafite (of Hogarth 1977)
4.DH.15Stibiomicrolite (of Groat et al.)
4.DH.15Strontiopyrochlore (of Hogarth 1977)
4.DH.15Stannomicrolite (of Hogarth 1977)
4.DH.15Stibiobetafite (of Černý et al.)
4.DH.15Uranpyrochlore (of Hogarth 1977)
(U,Ca,Ce)
 
2
(Nb,Ta)
 
2
O
 
6
(OH,F)
4.DH.15Yttrobetafite (of Hogarth 1977)
4.DH.15Yttropyrochlore (of Hogarth 1977)
4.DH.15Fluornatromicrolite
(Na,Ca,Bi)
 
2
Ta
 
2
O
 
6
F
4.DH.15Bismutopyrochlore (of Chukanov et al.)
4.DH.15Hydrokenoelsmoreite
◻
 
2
W
 
2
O
 
6
(H
 
2
O)
4.DH.20Oxyplumboroméite
Pb
 
2
Sb
 
2
O
 
6
O
4.DH.20Monimolite
4.DH.20Cuproroméite
Cu
 
2
Sb
 
2
(O,OH)
 
7
4.DH.20Stetefeldtite
Ag
 
2
Sb
 
2
(O,OH)
 
7
4.DH.20Stibiconite
4.DH.25Rosiaite
PbSb
5+
2
O
 
6
4.DH.30Zirconolite
CaZrTi
 
2
O
 
7
4.DH.35Liandratite
U(Nb,Ta)
 
2
O
 
8
4.DH.35Petscheckite
UFe(Nb,Ta)
 
2
O
 
8
4.DH.40Ingersonite
Ca
 
3
MnSb
 
4
O
 
14
4.DH.45Pittongite
Na
 
0.22
(W,Fe
3+
 
)(O,OH)
 
3
 · 0.44H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
7.13.1Arsenolite
As
 
2
O
 
3
7.13.2Claudetite
As
 
2
O
 
3
7.13.3Sénarmontite
Sb
 
2
O
 
3
7.13.4Valentinite
Sb
 
2
O
 
3
7.13.5Cervantite
Sb
3+
 
Sb
5+
 
O
 
4
7.13.6Stibiconite
7.13.7Bahianite
Al
 
5
Sb
 
3
O
 
14
(OH)
 
2
7.13.8Cualstibite-1M
(Cu,Al)
 
3
(OH)
 
6
[Sb
5+
 
(OH)
 
6
]
7.13.107.13.11Stibivanite
Sb
 
2
VO
 
5
7.13.12Bismite
Bi
 
2
O
 
3
7.13.13Sillénite
Bi
 
12
SiO
 
20

Other Names for Bismutostibiconite

Synonyms:
IMA1981-065
Other Languages:
German:Bismutostibiconit
Spanish:Bismutostibiconita

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 Bismutostibiconite

Reference List:

- +
Walenta, K. (1983): Bismutostibiconit, ein neues Mineral der Stibiconitgruppe aus dem Schwarzwald. Chemie der Erde 42, 77-81 (in German with English abstract). - American Mineralogist (1984), 69, 1190 (abstract).

Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 64.

Internet Links for Bismutostibiconite

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    • Localities for Bismutostibiconite

    The 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.
    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.
    Australia
     
    • New South Wales
      • Gough Co.
        • Kingsgate
    		Sharpe, J.L., & Williams P.A. (2004) - Secondary bismuth and molybdenum minerals from Kingsgate, New England district of New South Wales.- Australian Journal of Mineralogy, vol.10, n°1.
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Calw
    		American Mineralogist: 69: 1190
        • Gengenbach
          • Hinterohlsbach
    		Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 64
        • Offenburg
    		K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
        • Wolfach
          • Oberwolfach
            • Rankach valley
    		Chemie der Erde,(1983) 42, 77-81; Walenta, K. (1992): Die Mineralien des Schwarzwaldes. Chr. Weise Verlag, München, 336 pp. (in German)
    USA
     
    • California
      • Nevada Co.
        • Last Chance District
          • Spring Creek area
    		[MinRecord 29:165]
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