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
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).
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.
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