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Oxycalciopyrochlore

A valid IMA mineral species
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About OxycalciopyrochloreHide

Formula:
Ca2Nb2O6O
Colour:
Brownish-black
Lustre:
Vitreous
Hardness:
5
Specific Gravity:
5.30
Crystal System:
Isometric
Name:
First described by Černý et al. (1979) as stibiobetafite from Věžná I pegmatite, Moravia, Czech Republic. Renamed by IMA in 2010 according to the new nomenclature of the pyrochlore supergroup as oxycalciopyrochlore.
This page provides mineralogical data about Oxycalciopyrochlore.


Unique IdentifiersHide

Mindat ID:
40342
Long-form identifier:
mindat:1:1:40342:5
GUID
(UUID V4):
d34236d9-93af-4fb1-a373-e210eeb21530

IMA Classification of OxycalciopyrochloreHide

Approved
IMA status notes:
Redefined by the IMA
Approval year:
1978
First published:
1979
Approval history:
Approved by IMA in 1978 as stibiobetafite.
Redefined and renamed by IMA in 2010 as oxycalciopyrochlore.

Classification of OxycalciopyrochloreHide

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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
OcpclIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of OxycalciopyrochloreHide

Vitreous
Transparency:
Translucent
Colour:
Brownish-black
Comment:
It turns pale orange after heating at 700°C for 1 h in air.
Streak:
Creamy-white
Hardness:
Tenacity:
Brittle
Density:
5.30 g/cm3 (Measured)    5.1 g/cm3 (Calculated)

Optical Data of OxycalciopyrochloreHide

Type:
Isotropic
Colour in reflected light:
Medium gray
Comments:
n = >1.78.

Chemistry of OxycalciopyrochloreHide

Mindat Formula:
Ca2Nb2O6O

Chemical AnalysisHide

Oxide wt%:
 12345
Na2O2,18 %2,15 %0,12 %0 %0 %
CaO14,06 %13,92 %6,57 %6,58 %5,74 %
Fe2O31,32 %1,30 %1,42 %1,35 %1,20 %
TiO210,55 %10,44 %9,56 %9,48 %10,12 %
Nb2O527,91 %27,62 %26,70 %27,39 %26,98 %
Ta2O518,22 %18,03 %19,06 %17,52 %17,86 %
UO225,12 %24,87 %24,40 %24,15 %23,94 %
H2O0,64 %1,67 %12,17 %13,53 %14,16 %
Total:97 %96 %97 %97 %96 %
Empirical formulas:
Sample IDEmpirical Formula
1(Ca1.14U0.42Na0.32)?1.88(Nb0.95Ti0.60Ta0.37Fe0.08)?2O6.00[O0.61(OH)0.32]?0.93 on the basis of Nb+Ti+Ta+Fe=2

Crystallography of OxycalciopyrochloreHide

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Fd3m
Setting:
Fd3m
Cell Parameters:
a = 10.35 Å
Unit Cell V:
1110.6 ų
Z:
8
Morphology:
Discrete octahedra, or as granular aggregates.

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 4b: Highly evolved igneous rocks>3.0
34 : Complex granite pegmatites
36 : Carbonatites, kimberlites, and related igneous rocks

Type Occurrence of OxycalciopyrochloreHide

General Appearance of Type Material:
Discrete octahedra, or granular aggregates veining and replacing partly disordered columbite and niobian rutile.
Place of Conservation of Type Material:
University of Manitoba, Winnipeg, Manitoba, Canada, M5233.
Royal Ontario Museum, Toronto, Ontario, Canada, M35630.
Geological Setting of Type Material:
In a pegmatite cross-cutting a serpentinite.
Associated Minerals at Type Locality:

Synonyms of OxycalciopyrochloreHide

Varieties of OxycalciopyrochloreHide

Titan-uranoan OxycalciopyrochloreSome specimens of former Betafite (of Hogarth 1977) had turned out Titan-uranoan Oxycalciopyrochlores with contents of UO2 up to 24.7 mas.% and ThO2 3.2 mas.%.

Relationship of Oxycalciopyrochlore to other SpeciesHide

Other Members of this group:
Cesiokenopyrochlore◻Nb2(O,OH)6(Cs,◻) Iso. m3m (4/m 3 2/m) : Fd3m
Fluorcalciopyrochlore(Ca,Na)2(Nb, Ti)2O6FIso.
FluorhydropyrochloreA possible new species (See discussion in Atencio et al.
Fluorkenopyrochlore(◻,Sr,Ce,Ca,Na)2(Nb,Ti)2O6F
Fluornatropyrochlore(Na,Pb,Ca,REE,U)2Nb2O6FIso. m3m (4/m 3 2/m)
Fluorplumbopyrochlore(Pb,Y,Th,U,Na,Ca)2-x(Nb,Ti)2O6FIso.
Fluorstrontiopyrochlore(Sr,◻)2Nb2(O,OH)6F
Hydrokenopyrochlore(◻,x)2Nb2O6(H2O,Cs)Iso. m3m (4/m 3 2/m) : Fd3m
Hydropyrochlore(H2O,◻)2Nb2(O,OH)6(H2O)Iso. m3m (4/m 3 2/m) : Fd3m
Hydroxycalciopyrochlore(Ca,Na,U,◻)2(Nb,Ti)2O6(OH)Iso. m3m (4/m 3 2/m) : Fd3m
Hydroxykenopyrochlore(◻,Ce,Ba)2(Nb,Ti)2O6(OH,F)Iso. m3m (4/m 3 2/m) : Fd3m
Hydroxymanganopyrochlore(Mn2+,Th,Na,Ca,REE)2(Nb,Ti)2O6(OH) Iso. m3 (2/m 3)
Hydroxynatropyrochlore(Na,Ca,Ce)2Nb2O6(OH)Iso. m3m (4/m 3 2/m) : Fd3m
Hydroxyplumbopyrochlore (Pb1.50.5)Nb2O6(OH)Iso. m3m (4/m 3 2/m) : Fd3m
Kenoplumbopyrochlore(Pb,◻)Nb2O6(◻,O)
Oxynatropyrochlore(Na,Ca,U)2Nb2O6(O,OH)
OxyplumbopyrochlorePb2Nb2O6O
Oxyyttropyrochlore-(Y)(Y,◻)2Nb2O6O
Unnamed (Sb-analogue of Hydroxymanganopyrochlor)(Mn,Ca,Y)2(Sb,Ti)2O6(OH)

Related Minerals - Strunz-mindat GroupingHide

4.DH.Fluornatropyrochlore(Na,Pb,Ca,REE,U)2Nb2O6FIso. m3m (4/m 3 2/m)
4.DH.Roméite GroupA2(Sb5+)2O6Z
4.DH.Hydroxykenomicrolite(◻,Na,Sb3+)2Ta2O6(OH)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.Fluornatroroméite(Na,Ca)2Sb2(O,OH)6F
4.DH.OxyplumboroméitePb2Sb2O6OIso. m3m (4/m 3 2/m) : Fd3m
4.DH.Cesiokenopyrochlore◻Nb2(O,OH)6(Cs,◻) Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.Oxyyttrobetafite-(Y)Y2Ti2O6OIso. m3m (4/m 3 2/m) : Fd3m
4.DH.05BranneriteUTi2O6Mon. 2/m : B2/m
4.DH.05OrthobranneriteU4+U6+Ti4O12(OH)2Orth.
4.DH.05Thorutite(Th,U,Ca)Ti2(O,OH)6Mon.
4.DH.10KassiteCaTi2O4(OH)2Mon. 2/m : P21/b
4.DH.10Lucasite-(Ce)CeTi2(O,OH)6Mon.
4.DH.15 vaAlumotungstite2W2O6(H2O)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Bismutomicrolite (of Hogarth 1977)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Hydroplumboelsmoreite(Pb,◻)(W,Fe3+)2O6 · H2OIso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Hydropyrochlore(H2O,◻)2Nb2(O,OH)6(H2O)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Plumbomicrolite (of Hogarth 1977)
4.DH.15Stibiomicrolite (of Groat et al.)
4.DH.15Strontiopyrochlore (of Hogarth 1977)A2Nb2(O,OH)6Z
4.DH.15Fluornatromicrolite(Na1.5Bi0.5)Ta2O6FIso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Bismutopyrochlore (of Chukanov et al.)(Bi,Ca,U,Pb)2-xNb2(O,OH)6(OH)Amor.
4.DH.15Hydrokenoelsmoreite2W2O6(H2O)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Fluorcalciomicrolite(Ca,Na)2(Ta,Nb)2O6FIso. m3m (4/m 3 2/m) : Fd3m
4.DH.15OxycalciobetafiteCa2(Ti,Nb)2O6O
4.DH.15 vaYttromicrolite (of Hogarth)(Ca,Y3+,U,Na)2-x(Ta,Nb,Ti,Fe3+)2O7Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Oxynatropyrochlore(Na,Ca,U)2Nb2O6(O,OH)
4.DH.15Hydroxycalciopyrochlore(Ca,Na,U,◻)2(Nb,Ti)2O6(OH)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Fluorcalciopyrochlore(Ca,Na)2(Nb, Ti)2O6FIso.
4.DH.15Fluorstrontiopyrochlore(Sr,◻)2Nb2(O,OH)6F
4.DH.15OxyplumbopyrochlorePb2Nb2O6O
4.DH.15Kenoplumbopyrochlore(Pb,◻)Nb2O6(◻,O)
4.DH.15Oxyyttropyrochlore-(Y)(Y,◻)2Nb2O6O
4.DH.15Fluorkenopyrochlore(◻,Sr,Ce,Ca,Na)2(Nb,Ti)2O6F
4.DH.15Oxyuranobetafite(U,Ca,◻)2(Ti,Nb)2O6O
4.DH.15OxycalciomicroliteCa2Ta2O6OIso. m3m (4/m 3 2/m) : Fd3m
4.DH.15OxystannomicroliteSn2Ta2O6OIso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Kenoplumbomicrolite(Pb,◻)2Ta2O6(◻,OH,O)Iso.
4.DH.15Oxystibiomicrolite(Sb3+,Ca)2Ta2O6OIso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Hydromicrolite(H2O,◻)2Ta2(O,OH)6(H2O)
4.DH.15Hydrokenomicrolite(◻,H2O)2Ta2(O,OH)6(H2O)Iso. m3m (4/m 3 2/m)
4.DH.15Hydroxymanganopyrochlore(Mn2+,Th,Na,Ca,REE)2(Nb,Ti)2O6(OH) Iso. m3 (2/m 3)
4.DH.15HydroxycalciomicroliteCa1.5Ta2O6(OH)Iso. 4 3 2 : P42 3 2
4.DH.15Fluorplumbopyrochlore(Pb,Y,Th,U,Na,Ca)2-x(Nb,Ti)2O6FIso.
4.DH.15Hydroxyplumbopyrochlore (Pb1.50.5)Nb2O6(OH)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Oxynatromicrolite(Na,Ca,U)2(Ta,Nb)2O6(O,F)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Fluorhydropyrochlore
4.DH.15Hydroxykenoelsmoreite(◻,Pb)2(W,Fe3+,Al)2(O,OH)6(OH)Trig. 3 : R3
4.DH.15Hydrokenopyrochlore(◻,x)2Nb2O6(H2O,Cs)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Hydroxykenopyrochlore(◻,Ce,Ba)2(Nb,Ti)2O6(OH,F)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Hydroxynatropyrochlore(Na,Ca,Ce)2Nb2O6(OH)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Hydroxynatromicrolite(Na,Bi3+,◻)2Ta2O6(OH)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Unnamed (Sb-analogue of Hydroxymanganopyrochlor)(Mn,Ca,Y)2(Sb,Ti)2O6(OH)
4.DH.15Oxybismutomicrolite(Bi1.330.67)Σ2Ta2O6OIso. m3m (4/m 3 2/m) : Fd3m
4.DH.20BindheimitePb2Sb2O6OIso. m3m (4/m 3 2/m) : Fd3m
4.DH.20Hydroxycalcioroméite(Ca,Sb3+)2(Sb5+,Ti)2O6(OH)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.20MonimolitePb2Sb5+2O7Iso. m3m (4/m 3 2/m)
4.DH.20CuproroméiteCu2Sb2(O,OH)7Iso.
4.DH.20StetefeldtiteAg2Sb2(O,OH)7Iso.
4.DH.20StibiconiteSb3+Sb5+2O6(OH) Iso. m3m (4/m 3 2/m)
4.DH.20Fluorcalcioroméite(Ca,Na,◻)2Sb5+2(O,OH)6FIso. m3m (4/m 3 2/m) : Fd3m
4.DH.20OxycalcioroméiteCa2Sb2O6OIso. m3m (4/m 3 2/m) : Fd3m
4.DH.20Hydroxyferroroméite(Fe2+1.50.5)Sb5+2O6(OH)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.25RosiaitePbSb5+2O6Trig. 3m (3 2/m) : P3 1m
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/m 2/m 2/m) : Cmca
4.DH.30Stefanweissite(Ca,REE)2Zr2(Nb,Ti)(Ti,Nb)2Fe2+O14Orth. mmm (2/m 2/m 2/m) : Cmca
4.DH.35LiandratiteU(Nb,Ta)2O8Trig. 3m (3 2/m) : P3 1m
4.DH.35PetscheckiteUFe(Nb,Ta)2O8Hex.
4.DH.40IngersoniteCa3Mn2+Sb5+4O14Trig. 3 2 : P31 2 1
4.DH.45PittongiteNa0.22(W,Fe3+)(O,OH)3 · 0.44H2OHex. 6 m2 : P6m2
4.DH.50TazzoliiteBa4-xNaxTi2Nb3SiO17[PO2(OH)2]x(OH)(1-2x) Orth. mmm (2/m 2/m 2/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 OxycalciopyrochloreHide

References for OxycalciopyrochloreHide

Localities for OxycalciopyrochloreHide

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.

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.
China
 
  • Sichuan
    • Liangshan Yi
      • Huili County
Xue et al. (2021)
Xue et al. (2021)
      • Xichang County
        • Taihe intrusion
Rubo Zhang et al. (2003)
Czech Republic (TL)
 
  • Vysočina Region
    • Žďár nad Sázavou District
      • Věžná
Černý et al. (1979) +1 other reference
Germany
 
  • Baden-Württemberg
    • Freiburg Region
      • Breisgau-Hochschwarzwald
        • Vogtsburg im Kaiserstuhl
Anthony (1997)
  • Rhineland-Palatinate
    • Mayen-Koblenz
      • Mendig
        • Mendig
in the collection of Christof Schäfer
    • Vulkaneifel
      • Gerolstein
        • Rockeskyll
          • Rockeskyll volcanic complex
in the collection of Christof Schäfer
Japan
 
  • Fukushima Prefecture
    • Koriyama City
Matsubara et al. (2013)
Myanmar
 
  • Mandalay Region
    • Pyin-Oo-Lwin District
      • Mogok Township
        • Kyauk-Pyat-That
          • Thurein-taung
Pavel M. Kartashov analytical data (2010)
Norway
 
  • Vestfold og Telemark
    • Porsgrunn
      • Bjørkedalen
Chukanov (2014)
Russia
 
  • Chelyabinsk Oblast
    • Ilmen Mountains
Makagonov et al. (2017)
    • Vishnevye Mountains
      • Buldym Lake
Popova et al. (2018)
  • Krasnoyarsk Krai
    • Boguchansky District
      • Chadobets alkaline complex
Sharygin et al. (2017, August)
  • Murmansk Oblast
Williams (1996) +2 other references
Slovakia
 
  • Banská Bystrica Region
    • Lučenec District
      • Čamovce
Huraiová et al. (2019)
Tajikistan
 
  • Gorno-Badakhshan
    • Rangkul' Highlands
Chukanov et al. (1999) +1 other reference
The Moon
 
  • Mare Crisium
Mokhov et al. (2008)
 
矿物 and/or 产地  
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