Oxycalciopyrochlore
A valid IMA mineral species
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About Oxycalciopyrochlore
Formula:
Ca2Nb2O6O
Colour:
Brownish-black
Lustre:
Vitreous
Hardness:
5
Specific Gravity:
5.30
Crystal System:
Isometric
Member of:
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 Identifiers
Mindat ID:
40342
Long-form identifier:
mindat:1:1:40342:5
GUID
(UUID V4):
(UUID V4):
d34236d9-93af-4fb1-a373-e210eeb21530
IMA Classification of Oxycalciopyrochlore
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.
Redefined and renamed by IMA in 2010 as oxycalciopyrochlore.
Classification of Oxycalciopyrochlore
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
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 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 |
|---|---|---|
| Ocpcl | 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 Oxycalciopyrochlore
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:
5 on Mohs scale
Tenacity:
Brittle
Density:
5.30 g/cm3 (Measured) 5.1 g/cm3 (Calculated)
Optical Data of Oxycalciopyrochlore
Type:
Isotropic
Colour in reflected light:
Medium gray
Comments:
n = >1.78.
Chemistry of Oxycalciopyrochlore
Mindat Formula:
Ca2Nb2O6O
Elements listed:
Chemical Analysis
Oxide wt%:
| 1 | 2 | 3 | 4 | 5 | |
|---|---|---|---|---|---|
| Na2O | 2,18 % | 2,15 % | 0,12 % | 0 % | 0 % |
| CaO | 14,06 % | 13,92 % | 6,57 % | 6,58 % | 5,74 % |
| Fe2O3 | 1,32 % | 1,30 % | 1,42 % | 1,35 % | 1,20 % |
| TiO2 | 10,55 % | 10,44 % | 9,56 % | 9,48 % | 10,12 % |
| Nb2O5 | 27,91 % | 27,62 % | 26,70 % | 27,39 % | 26,98 % |
| Ta2O5 | 18,22 % | 18,03 % | 19,06 % | 17,52 % | 17,86 % |
| UO2 | 25,12 % | 24,87 % | 24,40 % | 24,15 % | 23,94 % |
| H2O | 0,64 % | 1,67 % | 12,17 % | 13,53 % | 14,16 % |
| Total: | 97 % | 96 % | 97 % | 97 % | 96 % |
Empirical formulas:
| Sample ID | Empirical 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 |
Sample references:
| ID | Locality | Reference | Notes |
|---|---|---|---|
| 1 | Atagoyama, Koriyama City, Fukushima Prefecture, Japan | ||
| 2 | " " | " " | |
| 3 | " " | " " | |
| 4 | " " | " " | |
| 5 | " " | " " |
Crystallography of Oxycalciopyrochlore
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 Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites | |
| 36 : Carbonatites, kimberlites, and related igneous rocks |
Type Occurrence of Oxycalciopyrochlore
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.
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 Oxycalciopyrochlore
Calciopyrochlore (in part)
Varieties of Oxycalciopyrochlore
| Titan-uranoan Oxycalciopyrochlore | Some 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 Species
Member of:
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)2O6F | Iso. |
| Fluorhydropyrochlore | A possible new species (See discussion in Atencio et al. | |
| Fluorkenopyrochlore | (◻,Sr,Ce,Ca,Na)2(Nb,Ti)2O6F | |
| Fluornatropyrochlore | (Na,Pb,Ca,REE,U)2Nb2O6F | Iso. m3m (4/m 3 2/m) |
| Fluorplumbopyrochlore | (Pb,Y,Th,U,Na,Ca)2-x(Nb,Ti)2O6F | Iso. |
| 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 | (Pb1.5◻0.5)Nb2O6(OH) | Iso. m3m (4/m 3 2/m) : Fd3m |
| Kenoplumbopyrochlore | (Pb,◻)Nb2O6(◻,O) | |
| Oxynatropyrochlore | (Na,Ca,U)2Nb2O6(O,OH) | |
| Oxyplumbopyrochlore | Pb2Nb2O6O | |
| Oxyyttropyrochlore-(Y) | (Y,◻)2Nb2O6O | |
| Unnamed (Sb-analogue of Hydroxymanganopyrochlor) | (Mn,Ca,Y)2(Sb,Ti)2O6(OH) |
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 | Orthobrannerite | U4+U6+Ti4O12(OH)2 |
| 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 | 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 Oxycalciopyrochlore
mindat.org URL:
https://www.mindat.org/min-40342.html
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References for Oxycalciopyrochlore
Reference List:
Atencio, D., Andrade, M. B., Christy, A. G., Giere, R., Kartashov, P. M. (2010) The pyrochlore supergroup of minerals: nomenclature. The Canadian Mineralogist, 48 (3) 673-698 doi:10.3749/canmin.48.3.673
Localities for Oxycalciopyrochlore
symbol to view information about a locality.
The 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).
All localities listed without proper references should be considered as questionable.
China | |
| Xue et al. (2021) |
| Xue et al. (2021) | |
| Rubo Zhang et al. (2003) |
Czech Republic (TL) | |
| Černý et al. (1979) +1 other reference |
Germany | |
| Anthony (1997) |
| in the collection of Christof Schäfer |
| in the collection of Christof Schäfer |
Japan | |
| Matsubara et al. (2013) |
Myanmar | |
| Pavel M. Kartashov analytical data (2010) |
Norway | |
| Chukanov (2014) |
Russia | |
| Makagonov et al. (2017) |
| Popova et al. (2018) |
| Sharygin et al. (2017, August) |
| Williams (1996) +2 other references |
Slovakia | |
| Huraiová et al. (2019) |
Tajikistan | |
| Chukanov et al. (1999) +1 other reference |
The Moon | |
| Mokhov et al. (2008) |
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In den Dellen quarries, Mendig, Mendig, Mayen-Koblenz, Rhineland-Palatinate, Germany