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Stibiconite

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Formula:
(Sb,O,OH) ?
Colour:
White, creamy-white, ...
Lustre:
Pearly, Earthy
Hardness:
5½ - 7
Name:
Named by Beudant in 1832 from the Greek "stibi", antimony, plus "konis", powder, alluding to its composition and habit.
Stibiconite was for a long time an acknowledged species, but is now questionable, in line with the revised nomenclature of the minerals of the pyrochlore supergroup (Atencio et al. 2010).

Stibiconite is not, as yet, a discredited mineral and is classified as 'Grandfathered' by the IMA. Full characterization of 'stibiconite' specimens is difficult, requiring full quantification of the oxidation states of Sb for complete characterization to determine whether it is a Sb3+ dominant romeite species or a new phase related to known synthetic phases Sb2O5 · 1-3H2O which have been reported to have a pyrochlore structure and contain no Sb3+ (Christy & Atencio, 2013).


Classification of Stibiconite

'Grandfathered' (first described prior to 1959), Questionable
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
44.1.1.1

44 : ANTIMONATES
1 : A2X2O6(O,OH,F)
7.13.6

7 : Oxides and Hydroxides
13 : Oxides of As, Sb and Bi

Physical Properties of Stibiconite

Pearly, Earthy
Diaphaneity (Transparency):
Transparent
Colour:
White, creamy-white, light to sulphur-yellow, orange, light brown; colourless to cloudy in transmitted light
Hardness (Mohs):
5½ - 7
Comment:
When compact
Density:
3.5 - 5.5 g/cm3 (Measured)    

Chemical Properties of Stibiconite

Formula:
(Sb,O,OH) ?
Elements listed in formula:

Occurrences of Stibiconite

First Recorded Occurrence of Stibiconite

Relationship of Stibiconite to other Species

4.DH.05Brannerite(U4+,REE,Th,Ca)(Ti,Fe3+,Nb)2(O,OH)6
4.DH.05OrthobranneriteU4+U6+Ti4O12(OH)2
4.DH.05Thorutite(Th,U,Ca)Ti2(O,OH)6
4.DH.10KassiteCaTi2O4(OH)2
4.DH.10Lucasite-(Ce)CeTi2(O,OH)6
4.DH.15Bariomicrolite (of Hogarth 1977)
4.DH.15Bariopyrochlore (of Hogarth 1977)A2Nb2(O,OH)6Z
4.DH.15Betafite (of Hogarth 1977)A2-mB2X6-wY1-n
4.DH.15Bismutomicrolite (of Hogarth 1977)
4.DH.15Calciobetafite (of Mazzi & Munno)(Ca,Na)2(Nb,Ti)2(O,OH)7
4.DH.15Ceriopyrochlore (of Hogarth 1977)A2Nb2(O,OH)6Z
4.DH.15Cesstibtantite
4.DH.15JixianitePb(W,Fe3+)2(O,OH)7
4.DH.15Hydropyrochlore(H2O,□)2Nb2(O,OH)6(H2O)
4.DH.15Natrobistantite
4.DH.15Plumbopyrochlore (of Skorobogatova et al.)A2Nb2(O,OH)6Z
4.DH.15Plumbomicrolite (of Hogarth 1977)
4.DH.15Plumbobetafite (of Hogarth 1977)A2-mB2X6-wY1-n
4.DH.15Stibiomicrolite (of Groat et al.)
4.DH.15Strontiopyrochlore (of Hogarth 1977)A2Nb2(O,OH)6Z
4.DH.15Stannomicrolite (of Hogarth 1977)
4.DH.15Stibiobetafite (of Černý et al.)A2-mB2X6-wY1-n
4.DH.15Uranpyrochlore (of Hogarth 1977)(U,Ca,Ce)2(Nb,Ta)2O6(OH,F)
4.DH.15Yttrobetafite (of Hogarth 1977)A2-mB2X6-wY1-n
4.DH.15Yttropyrochlore (of Hogarth 1977)A2Nb2(O,OH)6Z
4.DH.15Fluornatromicrolite(Na1.5Bi0.5)Ta2O6F
4.DH.15Bismutopyrochlore (of Chukanov et al.)A2Nb2(O,OH)6Z
4.DH.15Hydrokenoelsmoreite2W2O6(H2O)
4.DH.20BismutostibiconiteBi(Sb5+,Fe3+)2O7
4.DH.20BindheimitePb2Sb2O6O
4.DH.20Monimolite
4.DH.20CuproroméiteCu2Sb2(O,OH)7
4.DH.20StetefeldtiteAg2Sb2(O,OH)7
4.DH.25RosiaitePbSb25+O6
4.DH.30ZirconoliteCaZrTi2O7
4.DH.35LiandratiteU(Nb,Ta)2O8
4.DH.35PetscheckiteUFe(Nb,Ta)2O8
4.DH.40IngersoniteCa3Mn2+Sb45+O14
4.DH.45PittongiteNa0.22(W,Fe3+)(O,OH)3 · 0.44H2O
7.13.1ArsenoliteAs2O3
7.13.2ClaudetiteAs2O3
7.13.3SenarmontiteSb2O3
7.13.4ValentiniteSb2O3
7.13.5CervantiteSb3+Sb5+O4
7.13.7BahianiteAl5Sb3O14(OH)2
7.13.8Cualstibite-1M(Cu,Al)3(OH)6[Sb5+(OH)6]
7.13.9BismutostibiconiteBi(Sb5+,Fe3+)2O7
7.13.107.13.11StibivaniteSb2VO5
7.13.12BismiteBi2O3
7.13.13SilléniteBi12SiO20

Other Names for Stibiconite

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.

References for Stibiconite

Reference List:
Blum and Delffs (1847) Journal pr. Chem.: 40: 318.

Brush (1862) American Journal of Science: 34: 207.

Natta and Baccaredda (1933) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 85: 271 (as Hydroroméite).

Palache, Charles, Harry Berman & Clifford Frondel (1944) The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 597-598 (as Stibiconite), 1022 (as Hydroroméite).

Fornaseri (1946) Periodico de Mineralogia-Roma: 15: 47 (as Hydroroméite).

Vitaliano, C.J. and B. Mason (1952) Stibiconite and cervantite. American Mineralogist: 37: 982-999.

Anthony, J.W., Bideaux, R.A., Bladh, K.W., and Nichols, M.C. (1997) Handbook of Mineralogy, Volume III. Halides, Hydroxides, Oxides. Mineral Data Publishing, Tucson, AZ, 628pp.: 528.

Atencio D., Andrade M.B., Christy A.G., Giere R., Kartashov P.M. (2010) The pyrochlore supergroup of minerals: nomenclature. Canadian Mineralogist, 48, 569-594.

Christy A.G., Atencio D. (2013) Clarification of status of species in the pyrochlore supergroup. Mineralogical Magazine, 77, 13–20. http://nrmima.nrm.se/MM%2077(1%29%20AG%20Christy.pdf

Internet Links for Stibiconite

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https://www.mindat.org/min-3776.html
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Specimens:
The following Stibiconite specimens are currently listed for sale on minfind.com.

Localities for Stibiconite

Mineral and/or Locality  
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