SUPPORT US. Covid-19 has significantly affected our fundraising. Please help!
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsBooks & Magazines
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral Quiz
Photo SearchPhoto GalleriesSearch by ColorNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryMineral Photography


This page is currently not sponsored. Click here to sponsor this page.
Hide all sections | Show all sections

About HydroxycalciopyrochloreHide

Brownish-black, greenish-black and black
5 - 6
Specific Gravity:
Crystal System:
The Ca analogue of hydroxymanganopyrochlore and hydroxyplumbopyrochlore. The OH analogue of fluorcalciopyrochlore. Chemically related to charleshatchettite and 'Unnamed (MSH UK-56)'.

Classification of HydroxycalciopyrochloreHide

Approval year:
First published:

Physical Properties of HydroxycalciopyrochloreHide

Brownish-black, greenish-black and black
Colors on fresh sections
brown streak
5 - 6 on Mohs scale
VHN100=572 - Vickers
None Observed
None observed
5.10(3) g/cm3 (Measured)    5.15 g/cm3 (Calculated)
Measured by hydrostatic weighing

Chemical Properties of HydroxycalciopyrochloreHide

Common Impurities:

Chemical AnalysisHide

Empirical formulas:
Sample IDEmpirical Formula
Sample references:
1Vishnevye Mountains, Chelyabinsk Oblast, RussiaChukanov, N.V. (2014): Infrared spectra of mineral species. Extended library. Springer, Dordrecht 2014., p.496

Crystallography of HydroxycalciopyrochloreHide

Crystal System:
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Cell Parameters:
a = 10.381(4) Å
Unit Cell V:
1118.7 ų
Mostly as octahedra, and less often as dodecahedra and tetrahexahedra or combinations thereof. Some occur with an allotriomorphic habit with a thick triangular tabular form.

Crystal StructureHide

Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
CIF File    Best | x | y | z | a | b | c
Stop | Start
Console Off | On | Grey | Yellow
IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0020233HydroxycalciopyrochloreYang G, Li G, Xiong M, Pan B, Yan C (2014) Hydroxycalciopyrochlore, a new mineral species from Sichuan, China Acta Geologica Sinica 88 748-7532014Maoniuping mine, Mianning County, Xichang prefecture, Sichuan Province, China0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
2.9657 Å(100)
2.569 Å(18)
1.8142 Å(34)
1.5463 Å(21)
2.5688 Å(18)

Type Occurrence of HydroxycalciopyrochloreHide

Place of Conservation of Type Material:
China University of Geosciences, Beijng,China, catalogue number M595-22
Geological Setting of Type Material:
Alkali feldspar granite rare-earth ore deposit (26–27 Ma).
Associated Minerals at Type Locality:

Synonyms of HydroxycalciopyrochloreHide

Relationship of Hydroxycalciopyrochlore 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.
Fluornatropyrochlore(Na,Pb,Ca,REE,U)2Nb2O6FIso. m3m (4/m 3 2/m)
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
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
OxycalciopyrochloreCa2Nb2O6OIso. m3m (4/m 3 2/m) : Fd3m
Unnamed (Sb-analogue of Hydroxymanganopyrochlor)(Mn,Ca,Y)2(Sb,Ti)2O6(OH)

Common AssociatesHide

Associated Minerals Based on Photo Data:
2 photos of Hydroxycalciopyrochlore associated with Niobophyllite(K,Na)3(Fe,Mn)6(Nb,Ti)2Si8(O,OH,F)31
2 photos of Hydroxycalciopyrochlore associated with Monazite-(Ce)Ce(PO4)

Other InformationHide

Dissolves in H3PO4; does not dissolve in HCl and HNO3
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 HydroxycalciopyrochloreHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Hogarth, D. (1961) A study of pyrochlore and betafite. Canadian Mineralogist: 6: 610-633.
Bonazzi, P., Bindi, L., Zoppi, M., Capitani, G.C., and Olmi, F. (2006) Single-crystal diffraction and transmission electron microscopy studies of "silicified" pyrochlore from Narssârssuk, Julianehaab district, Greenland. American Mineralogist: 91: 794-801 [as pyrochlore].
Yang, G., Li, G., Xiong, M., Pan, B., and Yan, C. (2011) Hydroxycalciopyrochlore, IMA 2011-026. CNMNC Newsletter no. 10, October 2011, page 2554.
Christy, A.G. and Atencio, D. (2013) Clarification of status of species in the pyrochlore supergroup. Mineralogical Magazine: 77: 13-20.
Yang, G., Li, G., Xiong, M., Pan, B., and Yan C. (2014) Hydroxycalciopyrochlore, a new mineral species from Sichuan, China. Acta Geologica Sinica - English Edition: 88: 748–753.

Internet Links for HydroxycalciopyrochloreHide

Localities for HydroxycalciopyrochloreHide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Huíla Province
    • Quilengues
Amores-Casals, S., Melgarejo, J. C., Bambi, A., Gonçalves, A. O., Morais, E. A., Manuel, J., ... & Molist, J. M. (2019). Lamprophyre-Carbonatite Magma Mingling and Subsolidus Processes as Key Controls on Critical Element Concentration in Carbonatites—The Bonga Complex (Angola). Minerals, 9(10), 601.
  • Newfoundland and Labrador
    • Labrador
      • Seal Lake alkaline complex (Letitia Lake)
Pavel M. Kartashov analytical data (2013), Photo id 540666
  • Ontario
    • Haliburton County
      • Lutterworth Township
Hogarth, D. (1961) A Study of Pyrochlore and Betafite, Canadian Mineralogist, v. 6, p. 610-633.
    • Hastings County
      • Monteagle Township
Bideaux, R. (1997), v. 3, p. 457.; Hogarth, D. (1961) A Study of Pyrochlore and Betafite, Canadian Mineralogist: 6 : 610-633. Masson, S.L. and Gordon J.B. (1981) Radioactive Mineral Deposits of the Pembroke-Renfrew Area; Ontario Geological Survey Mineral Deposit Circular 23.
  • Québec
    • Outaouais
Hogarth, D. (1961) A Study of Pyrochlore and Betafite, Canadian Mineralogist, v. 6, p. 610-633.
China (TL)
  • Sichuan
    • Liangshan Yi
      • Mianning County
Yang, G., Li, G., Xiong, M., Pan, B. and Yan, C. (2011): Hydroxycalciopyrochlore, IMA 2011-026. CNMNC Newsletter no. 10, October 2011, page 2554; Yang, G., Li, G., Xiong, M., Pan, B., Yan C. (2014): Hydroxycalciopyrochlore, a new mineral species from Sichuan, China. Acta Geologica Sinica - English Edition, 88, 748–753.
  • Xinjiang
    • Akesu Prefecture (Aksu Prefecture; Aqsu Prefecture)
      • Baicheng Co. (Bay Co.)
Jingwu Yin, Xingkun Shao, Haitao Yang, Tingxian Piao, Haiming Xu, and Jun Wang (2013): Mineral Deposits 32(2), 337-352
Czech Republic
  • South Bohemian Region
    • Český Krumlov District
      • Černá v Pošumaví (Schwarzbach im Böhmerwald)
        • Bližná
Drábek;, M., Frýda J., Šarbach M., Skála, R. (2017): Hydroxycalciopyrochlore from a regionally metamorphic marble at Bližná, Southwestern Czech Republic. Neues Jahrbuch für Mineralogie - Abhandlungen: Journal of Mineralogy and Geochemistry, 194, 49-59.
  • Southwest Finland
    • Laitila
Pavel M. Kartashov analytical data 2019, Joel Dyer collection
  • Hesse
    • Darmstadt
      • Darmstadt-Dieburg
        • Fischbachtal
          • Lichtenberg
Belendorff, K. (2021): Neue mineralogische Raritäten aus dem Odenwald. Mineralien-Welt 32(2), 8-22 (in German).
  • Rhineland-Palatinate
    • Mayen-Koblenz District
      • Mendig
        • Mendig
Zubkova. N.V., Chikanov, N.V., Pekov, I.V., Schäfer, Ch.J., Yapaskurt, V.O., Pushcharovsky, D.Yu. (2015): Lanthanum-rich Fluorbritholithe-(Ce) from young alkaline volcanic rock of Eifel (Germany) and ist crystal structure. Cation ordering in Briotholites. Doklady Earth Sciences, Vol. 464, No. 2, pp. 199-202
  • Kujalleq
    • Igaliku
      • Narsaarsuk Plateau
Bonazzi, P., Bindi, L., Zoppi, M.,Capitani, G. C. & OLmi, F.(2006): Single-crystal diffraction and transmission electron microscopy studies of "silicified" pyrochlore from Narssârssuk, Julianehaab district, Greenland. American Mineralogist: 91:794-801; Atencio D., Andrade M.B., Christy A.G., Giere R., Kartashov P.M. (2010) The pyrochlore supergroup of minerals: nomenclature. The Canadian Mineralogist: 48: 673-698.
  • Chelyabinsk Oblast
Chukanov, N.V. (2014): Infrared spectra of mineral species. Extended library. Springer, Dordrecht 2014., p.496
Pavel M. Kartashov analytical data of 2018
  • Murmansk Oblast
    • Northern Karelia
      • Vuoriyarvi alkaline-ultrabasic massif
Kozlov, E.; Fomina, E.; Sidorov, M.; Shilovskikh, V.; Bocharov, V.; Chernyavsky, A.; Huber, M. (2020) The Petyayan-Vara Carbonatite-Hosted Rare Earth Deposit (Vuoriyarvi, NW Russia): Mineralogy and Geochemistry. Minerals 10, 73.
  • Košice Region
    • Rožňava District
      • Dobšiná
        • Dobšiná mining district
Uher P., Bačík P., Števko M., Chládek Š., Fridrichová J. (2018): Elbaite-bearing, Nb-Ta-rich granitic pegmatite from Dobšiná, Gemeric Unit, Eastern Slovakia: the first documented occurrence in the Western Carpathians. Joint 5th Central-European Mineralogical Conference and 7th Mineral Sciences in the Carpathians Conference, Book of Abstracts, 109.
  • Districts of Republican Subordination
Ефимов А.Ф., Семёнов Е.И., Акрамов А.Н., Дусматов В.Д., Любомилова В.Г. (1980) Минералы группы пирохлора из щелочных пород Восточного Каратегина (Южный Тянь-Шань), - Доклады АН Тадж. ССР, 1980, т.XXIII, №3, с. 158-161.
  • New Jersey
    • Sussex County
      • Franklin Mining District
        • Franklin
          • Franklin Mine
Chris O'Neill
Mineral and/or Locality  
Mindat Discussions Facebook Logo Instagram Logo Discord Logo is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © and the Hudson Institute of Mineralogy 1993-2021, except where stated. Most political location boundaries are © OpenStreetMap contributors. relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us - Report a bug/vulnerability Current server date and time: May 17, 2021 09:17:50 Page generated: May 9, 2021 06:29:28
Go to top of page