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Bismutomicrolite (of Hogarth 1977)

A discredited species name
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06997400017272360458358.jpg
Bismutomicrolite (of Hogarth 1977), etc.

Alto Cajazeiras, Junco do Seridó, Paraíba, Brazil
01543430017272729223232.jpg
Bismutomicrolite (of Hogarth 1977)

Lipovka Mine, Lipovsk pegmatite field, Rezhevsky District, Sverdlovsk Oblast, Russia
06541690017271995877244.jpg
Bismutomicrolite (of Hogarth 1977)

Alto Manoel Balduino claim, Junco do Seridó, Paraíba, Brazil
06417630017271921489300.jpg
Bismutomicrolite (of Hogarth 1977), etc.

Alto Cajazeiras, Junco do Seridó, Paraíba, Brazil
04285920017271921518356.jpg
Bismutomicrolite (of Hogarth 1977)

Lipovka Mine, Lipovsk pegmatite field, Rezhevsky District, Sverdlovsk Oblast, Russia
04256020017271995815497.jpg
Bismutomicrolite (of Hogarth 1977)

Alto Manoel Balduino claim, Junco do Seridó, Paraíba, Brazil
06417630017271921489300.jpg
Bismutomicrolite (of Hogarth 1977), etc.

Alto Cajazeiras, Junco do Seridó, Paraíba, Brazil
04285920017271921518356.jpg
Bismutomicrolite (of Hogarth 1977)

Lipovka Mine, Lipovsk pegmatite field, Rezhevsky District, Sverdlovsk Oblast, Russia
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About Bismutomicrolite (of Hogarth 1977)Hide

Colour:
Yellow, pink, brown; dark grey to black
Lustre:
Resinous, Dull
Hardness:
5
Specific Gravity:
6.5
Crystal System:
Isometric
Name:
Assigned by the IMA Committee on pyrochlore nomenclature for the predominant bismuth content and relation to microlite in the pyrochlore group. Name discredited in 2010.
The composition claimed for the original bismutomicrolite [“westgrenite”] (von Knorring & Mrose 1963) probably refers to a mixture. The bismutomicrolite studied by Erichsen de Oliveira et al. (1970) and Tindle & Breaks (1998) is a zero valent dominant member of the microlite group.


Unique IdentifiersHide

Mindat ID:
665
Long-form identifier:
mindat:1:1:665:7

Similar NamesHide

IMA Classification of Bismutomicrolite (of Hogarth 1977)Hide

IMA status:
Discredited

Classification of Bismutomicrolite (of Hogarth 1977)Hide

Strunz-mindat (2026):
4.DH.15

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 ed.:
8.2.2.5

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
2 : A2B2O6(O,OH,F)
Hey's CIM Ref.:
18.1.35

18 : Niobates and Tantalates
1 : Niobates and tantalates containing neither rare earths nor U

Physical Properties of Bismutomicrolite (of Hogarth 1977)Hide

Lustre:
Resinous, Dull
Transparency:
Translucent
Colour:
Yellow, pink, brown; dark grey to black
Hardness:
5 on Mohs scale
Tenacity:
Brittle
Fracture:
Irregular/Uneven
Density:
6.5 g/cm3 (Measured)    6.9 g/cm3 (Calculated)

Optical Data of Bismutomicrolite (of Hogarth 1977)Hide

Type:
Isotropic
RI values:
n = 2
Surface Relief:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).

This shows the grain boundary and Becke line effect under plane-polarised light, based on the contrast between this mineral's average refractive index and the mounting medium. It does not take into account mineral colouration.
In focus

Crystallography of Bismutomicrolite (of Hogarth 1977)Hide

Crystal System:
Isometric
Class (H-M):
m3m(4/m32/m) - Hexoctahedral
Space Group:
Fd3m
Cell Parameters:
a = 10.46 Å
Unit Cell V:
1,144.45 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Rarely octahedral crystals; commonly massive, in veinlets.

Geological EnvironmentHide

Geological Setting:
In pegmatites

First Recorded Occurrence of Bismutomicrolite (of Hogarth 1977)Hide

First Recorded Locality:
ⓘ Wampewo Hill, Busiro Co. (Bushiro Co.), Wakiso, Central Region, Uganda
Geological Setting of First Recorded Material:
Late hydrothermal replacement of bismutotantalite in a lithium-bearing pegmatite
Associated Minerals at First Recorded Locality:
BismutotantaliteWaylandite

Synonyms of Bismutomicrolite (of Hogarth 1977)Hide

Other Language Names for Bismutomicrolite (of Hogarth 1977)Hide

Common AssociatesHide

Associations Based on Photo Data:
3 photos of Bismutomicrolite (of Hogarth 1977) associated with Hydrokenomicrolite(◻,H2O)2Ta2(O,OH)6(H2O)
3 photos of Bismutomicrolite (of Hogarth 1977) associated with KaoliniteAl2(Si2O5)(OH)4

Related Minerals - Strunz-mindat GroupingHide

4.DH.Cesiokenopyrochlore◻Nb2(O,OH)6(Cs,◻) Iso. m3m(4/m32/m) : Fd3m
4.DH.Roméite GroupA2(Sb5+)2O6Z
4.DH.OxyplumboroméitePb2Sb2O6OIso. m3m(4/m32/m) : Fd3m
4.DH.Fluornatropyrochlore(Na,Pb,Ca,REE,U)2Nb2O6FIso. m3m(4/m32/m)
4.DH.Hydroxykenomicrolite(◻,Na,Sb3+)2Ta2O6(OH,Cs)Iso. m3m(4/m32/m) : Fd3m
4.DH.'Fluornatroroméite'(Na,Ca)2Sb2(O,OH)6F
4.DH.Oxyyttrobetafite-(Y)Y2Ti2O6OIso. m3m(4/m32/m) : Fd3m
4.DH.05Thorutite(Th,U,Ca)Ti2(O,OH)6Mon.
4.DH.05OrthobranneriteU4+U6+Ti4O12(OH)2Orth.
4.DH.05BranneriteUTi2O6Mon. 2/m : B2/m
4.DH.10KassiteCaTi2O4(OH)2Mon. 2/m : P21/b
4.DH.10Lucasite-(La)Mon. 2 : B2
4.DH.10Lucasite-(Ce)CeTi2(O,OH)6Mon.
4.DH.15'Fluorhydropyrochlore'
4.DH.15Hydrokenoelsmoreite◻2W2O6(H2O)Iso. m3m(4/m32/m) : Fd3m
4.DH.15'Hydroxynatromicrolite'(Na,Bi3+,◻)2Ta2O6(OH)Iso. m3m(4/m32/m) : Fd3m
4.DH.15Hydroplumboelsmoreite(Pb,◻)(W,Fe3+)2O6 · H2OIso. m3m(4/m32/m) : Fd3m
4.DH.15Hydropyrochlore(H2O,◻)2Nb2(O,OH)6(H2O)Iso. m3m(4/m32/m) : Fd3m
4.DH.15'Unnamed (Sb-analogue of Hydroxymanganopyrochlor)'(Mn,Ca,Y)2(Sb,Ti)2O6(OH)
4.DH.15Hydroxynatropyrochlore(Na,Ca,Ce)2Nb2O6(OH)Iso. m3m(4/m32/m) : Fd3m
4.DH.15Hydrokenopyrochlore(◻,x)2Nb2O6(H2O,Cs)Iso. m3m(4/m32/m) : Fd3m
4.DH.15Oxybismutomicrolite(Bi1.33◻0.67)Σ2Ta2O6OIso. m3m(4/m32/m) : Fd3m
4.DH.15Kenomicrolite◻2Ta2[O4(OH)2]◻Iso. m3m(4/m32/m) : Fd3m
4.DH.15Fluornatromicrolite(Na1.5Bi0.5)Ta2O6FIso. m3m(4/m32/m) : Fd3m
4.DH.15'Oxynatropyrochlore'(Na,Ca,U)2Nb2O6(O,OH)
4.DH.15Hydroxycalciopyrochlore(Ca,Na,U,◻)2(Nb,Ti)2O6(OH)Iso. m3m(4/m32/m) : Fd3m
4.DH.15Fluorcalciopyrochlore(Ca,Na)2(Nb,Ti)2O6FIso.
4.DH.15OxycalciopyrochloreCa2Nb2O6OIso. m3m(4/m32/m) : Fd3m
4.DH.15'Fluorstrontiopyrochlore'(Sr,◻)2Nb2(O,OH)6F
4.DH.15OxyplumbopyrochlorePb2Nb2O6OIso. m3m(4/m32/m) : Fd3m
4.DH.15'Fluorplumbopyrochlore'(Pb,Y,Th,U,Na,Ca)2-x(Nb,Ti)2O6FIso.
4.DH.15'Bismutopyrochlore (of Chukanov et al.)'(Bi,Ca,U,Pb)2-xNb2(O,OH)6(OH)Amor.
4.DH.15'Kenoplumbopyrochlore'(Pb,◻)Nb2O6(◻,O)
4.DH.15Hydroxyplumbopyrochlore (Pb1.5◻0.5)Nb2O6(OH)Iso. m3m(4/m32/m) : Fd3m
4.DH.15'Stibiomicrolite (of Groat et al.)'
4.DH.15'Oxyyttropyrochlore-(Y)'(Y,◻)2Nb2O6O
4.DH.15'Fluorkenopyrochlore'(◻,Sr,Ce,Ca,Na)2(Nb,Ti)2O6F
4.DH.15HydroxycalciomicroliteCa1.5Ta2O6(OH)Iso. 432 : P4232
4.DH.15'Strontiopyrochlore (of Hogarth 1977)'(Sr,Ce,Ca)0.66(Nb,Fe)2(O,OH)7
4.DH.15 va'Alumotungstite'◻2W2O6(H2O)Iso. m3m(4/m32/m) : Fd3m
4.DH.15'Oxycalciobetafite'Ca2(Ti,Nb)2O6O
4.DH.15'Oxyuranobetafite'(U,Ca,◻)2(Ti,Nb)2O6O
4.DH.15Fluorcalciomicrolite(Ca,Na)2(Ta,Nb)2O6FIso. m3m(4/m32/m) : Fd3m
4.DH.15OxycalciomicroliteCa2Ta2O6OIso. m3m(4/m32/m) : Fd3m
4.DH.15OxystannomicroliteSn2Ta2O6OIso. m3m(4/m32/m) : Fd3m
4.DH.15Kenoplumbomicrolite(Pb,◻)2Ta2O6(◻,OH,O)Iso.
4.DH.15Oxynatromicrolite(Na,Ca,U)2(Ta,Nb)2O6(O,F)Iso. m3m(4/m32/m) : Fd3m
4.DH.15Oxystibiomicrolite(Sb3+,Ca)2Ta2O6OIso. m3m(4/m32/m) : Fd3m
4.DH.15'Hydromicrolite'(H2O,◻)2Ta2(O,OH)6(H2O)
4.DH.15'Plumbomicrolite (of Hogarth 1977)'
4.DH.15Hydrokenomicrolite(◻,H2O)2Ta2(O,OH)6(H2O)Iso. m3m(4/m32/m)
4.DH.15Hydroxykenoelsmoreite(◻,Pb)2(W,Fe3+,Al)2(O,OH)6(OH)Trig. 3 : R3
4.DH.15 va'Yttromicrolite (of Hogarth)'(Ca,Y3+,U,Na)2-x(Ta,Nb,Ti,Fe3+)2O7Iso. m3m(4/m32/m) : Fd3m
4.DH.15Hydroxykenopyrochlore(◻,Ce,Ba)2(Nb,Ti)2O6(OH,F)Iso. m3m(4/m32/m) : Fd3m
4.DH.15Hydroxymanganopyrochlore(Mn2+,Th,Na,Ca,REE)2(Nb,Ti)2O6(OH) Iso. m3(2/m3)
4.DH.20'Cuproroméite'Cu2Sb2(O,OH)7Iso.
4.DH.20Hydroxycalcioroméite(Ca,Sb3+)2(Sb5+,Ti)2O6(OH)Iso. m3m(4/m32/m) : Fd3m
4.DH.20BindheimitePb2Sb2O6OIso. m3m(4/m32/m) : Fd3m
4.DH.20Hydroxyferroroméite(Fe2+1.5◻0.5)Sb5+2O6(OH)Iso. m3m(4/m32/m) : Fd3m
4.DH.20Fluorcalcioroméite(Ca,Na,◻)2Sb5+2(O,OH)6FIso. m3m(4/m32/m) : Fd3m
4.DH.20OxycalcioroméiteCa2Sb2O6OIso. m3m(4/m32/m) : Fd3m
4.DH.20StetefeldtiteAg2Sb2(O,OH)7Iso.
4.DH.20StibiconiteSb3+Sb5+2O6(OH)Iso. m3m(4/m32/m)
4.DH.20MonimolitePb2Sb5+2O7Iso. m3m(4/m32/m)
4.DH.25RosiaitePbSb5+2O6Trig. 3m(32/m) : P31m
4.DH.30Stefanweissite(Ca,REE)2Zr2(Nb,Ti)(Ti,Nb)2Fe2+O14Orth. mmm(2/m2/m2/m) : Cmca
4.DH.30ZirconoliteCaZrTi2O7Orth.
4.DH.30Laachite(Ca,Mn)2Zr2Nb2TiFeO14Mon. 2/m : B2/b
4.DH.30Nöggerathite-(Ce)(Ce,Ca)2Zr2(Nb,Ti)(Ti,Nb)2Fe2+O14Orth. mmm(2/m2/m2/m) : Cmca
4.DH.35LiandratiteU(Nb,Ta)2O8Trig. 3m(32/m) : P31m
4.DH.35PetscheckiteUFe(Nb,Ta)2O8Hex.
4.DH.40IngersoniteCa3Mn2+Sb5+4O14Trig. 32 : P3121
4.DH.45PittongiteNa0.22(W,Fe3+)(O,OH)3 · 0.44H2OHex. 6m2 : P6m2
4.DH.50TazzoliiteBa4-xNaxTi2Nb3SiO17[PO2(OH)2]x(OH)(1-2x) Orth. mmm(2/m2/m2/m) : Fmmm

Other InformationHide

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 Bismutomicrolite (of Hogarth 1977)Hide

References for Bismutomicrolite (of Hogarth 1977)Hide

Localities for Bismutomicrolite (of Hogarth 1977)Hide

Showing 17 localities.

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.
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Locality ListHide

- 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.
Argentina
 
  • Salta Province
    • La Poma Department
      • El Quemado mining district
Galliski et al. (2001)
Brazil
 
  • Goiás
    • Trombas
Anthony (1997)
  • Paraíba
Specimen in the collection of Richard ...
Pavel M. Kartashov analytical data
Anthony (1997)
  • Rio Grande do Norte
    • Carnaúba dos Dantas
      • Ermo
Anthony (1997)
    • Equador
    • Parelhas
Beurlen +4 other references
Canada
 
  • Ontario
    • Kenora District
      • Paterson Lake Area
Tindle et al. (1998)
Avalon Advanced Materials Inc.
China
 
  • Xinjiang
    • Ili Kazakh Autonomous Prefecture
      • Altay Prefecture (Aletai Prefecture)
        • Fuyun Co. (Koktokay Co.)
www.smartminerals.com (2004)
Finland
 
  • Uusimaa
    • Myrskylä
Pavel M. Kartashov analytical data 2017
Japan
 
  • Fukuoka Prefecture
    • Fukuoka City
Uehara et al. (2014)
Madagascar
 
  • Amoron'i Mania
    • Ambatofinandrahana District
      • Fenoarivo
Pers.com Roy Kristiansen 1996
Russia
 
  • Sverdlovsk Oblast
    • Rezhevsky District
      • Lipovsk pegmatite field
Igor.V. Pekov (2008)
Uganda (FRL)
 
  • Central Region
    • Wakiso
      • Busiro Co. (Bushiro Co.)
Am Min 62 (1977) +1 other reference
USA
 
  • Wisconsin
    • Dodge County
Buchholz et al. (2007)
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