Hydroxycalcioroméite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Hydroxycalcioroméite
Formula:
(Ca,Sb3+)2(Sb5+,Ti)2O6(OH)
Ca may be replaced by Na, Fe, Mg and H2O. Sb may be replaced by Si.
Colour:
Amber yellow, golden yellow, yellow brown
Lustre:
Sub-Vitreous, Resinous, Earthy
Hardness:
5½
Specific Gravity:
4.95
Crystal System:
Isometric
Member of:
Name:
Originally described as lewisite by Hussak & Prior (1895). Renamed as Ti-bearing roméite in 2007 in anticipation of systematic names replacing trivial names. Renamed according to the nomenclature of the pyrochlore supergroup as hydroxycalcioroméite.
Type Locality:
Previously known as lewisite, the crystal structure of this mineral was initially determined by Rouse et al.. (1998) and later by Zubkova et al.. (2000). The type sample for "lewisite" was described by Hussak & Prior (1895) and became the type specimen for hydroxycalcioroméite after the new nomenclature for the Pyrochlore Supergroup (Atencio et al.., 2010). The type locality for this mineral is Fazenda Três Cruzes, Tripuí, Ouro Preto, Minas Gerais, Brazil (Lopes et al.., 2021).
Found as yellow to brown octahedral crystals to 1 mm and as earthy masses.
Compare the anhydrous oxycalcioroméite.
Found as yellow to brown octahedral crystals to 1 mm and as earthy masses.
Compare the anhydrous oxycalcioroméite.
Name Encoding
ASCII-7:
Hydroxycalcioromeite
Unique Identifiers
Mindat ID:
2389
Long-form identifier:
mindat:1:1:2389:0
IMA Classification of Hydroxycalcioroméite
Approved
IMA status notes:
Redefined by the IMA, Renamed by the IMA
IMA Formula:
(Ca,Sb3+)2(Sb5+,Ti4+)2O6(OH)
Approval year:
2010
First published:
1895
Approval history:
Pre-IMA, grandfathered (as lewisite).
2007: Discredited as Ti-bearing roméite (Burke 2007).
2010: Redefined and renamed by IMA as hydroxycalcioroméite (IMA special procedure 2010)
2007: Discredited as Ti-bearing roméite (Burke 2007).
2010: Redefined and renamed by IMA as hydroxycalcioroméite (IMA special procedure 2010)
Classification of Hydroxycalcioroméite
4.DH.20
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 for Standard |
|---|---|---|
| Hcr | 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 Hydroxycalcioroméite
Sub-Vitreous, Resinous, Earthy
Transparency:
Transparent, Translucent
Colour:
Amber yellow, golden yellow, yellow brown
Streak:
Pale yellow brown
Hardness:
5½ on Mohs scale
Hardness Data:
Measured
Tenacity:
Brittle
Cleavage:
Perfect
{111}
{111}
Fracture:
Sub-Conchoidal
Density:
4.95 g/cm3 (Measured) 5.31 g/cm3 (Calculated)
Optical Data of Hydroxycalcioroméite
Type:
Isotropic
Pleochroism:
Non-pleochroic
Chemistry of Hydroxycalcioroméite
Mindat Formula:
(Ca,Sb3+)2(Sb5+,Ti)2O6(OH)
Ca may be replaced by Na, Fe, Mg and H2O. Sb may be replaced by Si.
Ca may be replaced by Na, Fe, Mg and H2O. Sb may be replaced by Si.
Element Weights:
Crystallography of Hydroxycalcioroméite
Crystal System:
Isometric
Class (H-M):
m3m(4/m32/m) - Hexoctahedral
Space Group:
Fd3m
Cell Parameters:
a = 10.264 Å
Unit Cell V:
1,081.31 ų (Calculated from Unit Cell)
Morphology:
Octahedral
Comment:
ICDD 7-66
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.94 Å | (100) |
| 1.813 Å | (100) |
| 1.548 Å | (100) |
| 1.179 Å | (50) |
| 1.150 Å | (50) |
| 1.050 Å | (50) |
| 0.989 Å | (50) |
Comments:
ICDD 7-66
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47d : [Arsenates, antimonates, selenates, bismuthinates] | |
| 47h : [Near-surface oxidized, dehydrated minerals] |
Geological Setting:
Sulfosalt veins
Type Occurrence of Hydroxycalcioroméite
Associated Minerals at Type Locality:
Synonyms of Hydroxycalcioroméite
Other Language Names for Hydroxycalcioroméite
Relationship of Hydroxycalcioroméite to other Species
Member of:
Other Members of Roméite Group:
| 'Cuproroméite' | Cu2Sb2(O,OH)7 | Iso. |
| Fluorcalcioroméite | (Ca,Na,◻)2Sb5+2(O,OH)6F | Iso. m3m(4/m32/m) : Fd3m |
| Hydroxyferroroméite | (Fe2+1.5◻0.5)Sb5+2O6(OH) | Iso. m3m(4/m32/m) : Fd3m |
| Oxycalcioroméite | Ca2Sb2O6O | Iso. m3m(4/m32/m) : Fd3m |
| Oxyplumboroméite | Pb2Sb2O6O | Iso. m3m(4/m32/m) : Fd3m |
Common Associates
Associations Based on Photo Data:
| 4 photos of Hydroxycalcioroméite associated with Hemimorphite | Zn4Si2O7(OH)2 · H2O |
| 4 photos of Hydroxycalcioroméite associated with 'Cuproroméite' | Cu2Sb2(O,OH)7 |
| 3 photos of Hydroxycalcioroméite associated with Andradite | Ca3Fe3+2(SiO4)3 |
| 2 photos of Hydroxycalcioroméite associated with Hematite | Fe2O3 |
| 2 photos of Hydroxycalcioroméite associated with Tripuhyite | Fe3+Sb5+O4 |
| 2 photos of Hydroxycalcioroméite associated with Rosasite | (Cu,Zn)2(CO3)(OH)2 |
| 1 photo of Hydroxycalcioroméite associated with Native Antimony | Sb |
| 1 photo of Hydroxycalcioroméite associated with Stibnite | Sb2S3 |
| 1 photo of Hydroxycalcioroméite associated with Stibiconite | Sb3+Sb5+2O6(OH) |
| 1 photo of Hydroxycalcioroméite associated with Avicennite | Tl3+2O3 |
Related Minerals - Strunz-mindat Grouping
| 4.DH. | Cesiokenopyrochlore | ◻Nb2(O,OH)6(Cs,◻) |
| 4.DH. | Roméite Group | A2(Sb5+)2O6Z |
| 4.DH. | Oxyplumboroméite | Pb2Sb2O6O |
| 4.DH. | Fluornatropyrochlore | (Na,Pb,Ca,REE,U)2Nb2O6F |
| 4.DH. | Hydroxykenomicrolite | (◻,Na,Sb3+)2Ta2O6(OH,Cs) |
| 4.DH. | 'Fluornatroroméite' | (Na,Ca)2Sb2(O,OH)6F |
| 4.DH. | Oxyyttrobetafite-(Y) | Y2Ti2O6O |
| 4.DH.05 | Thorutite | (Th,U,Ca)Ti2(O,OH)6 |
| 4.DH.05 | Orthobrannerite | U4+U6+Ti4O12(OH)2 |
| 4.DH.05 | Brannerite | UTi2O6 |
| 4.DH.10 | Kassite | CaTi2O4(OH)2 |
| 4.DH.10 | Lucasite-(La) | |
| 4.DH.10 | Lucasite-(Ce) | CeTi2(O,OH)6 |
| 4.DH.15 | 'Fluorhydropyrochlore' | |
| 4.DH.15 | Hydrokenoelsmoreite | ◻2W2O6(H2O) |
| 4.DH.15 | 'Hydroxynatromicrolite' | (Na,Bi3+,◻)2Ta2O6(OH) |
| 4.DH.15 | Hydroplumboelsmoreite | (Pb,◻)(W,Fe3+)2O6 · H2O |
| 4.DH.15 | Hydropyrochlore | (H2O,◻)2Nb2(O,OH)6(H2O) |
| 4.DH.15 | 'Unnamed (Sb-analogue of Hydroxymanganopyrochlor)' | (Mn,Ca,Y)2(Sb,Ti)2O6(OH) |
| 4.DH.15 | Hydroxynatropyrochlore | (Na,Ca,Ce)2Nb2O6(OH) |
| 4.DH.15 | Hydrokenopyrochlore | (◻,x)2Nb2O6(H2O,Cs) |
| 4.DH.15 | Oxybismutomicrolite | (Bi1.33◻0.67)Σ2Ta2O6O |
| 4.DH.15 | Kenomicrolite | ◻2Ta2[O4(OH)2]◻ |
| 4.DH.15 | Fluornatromicrolite | (Na1.5Bi0.5)Ta2O6F |
| 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 | Oxycalciopyrochlore | Ca2Nb2O6O |
| 4.DH.15 | 'Fluorstrontiopyrochlore' | (Sr,◻)2Nb2(O,OH)6F |
| 4.DH.15 | Oxyplumbopyrochlore | Pb2Nb2O6O |
| 4.DH.15 | 'Fluorplumbopyrochlore' | (Pb,Y,Th,U,Na,Ca)2-x(Nb,Ti)2O6F |
| 4.DH.15 | 'Bismutomicrolite (of Hogarth 1977)' | |
| 4.DH.15 | 'Bismutopyrochlore (of Chukanov et al.)' | (Bi,Ca,U,Pb)2-xNb2(O,OH)6(OH) |
| 4.DH.15 | 'Kenoplumbopyrochlore' | (Pb,◻)Nb2O6(◻,O) |
| 4.DH.15 | Hydroxyplumbopyrochlore | (Pb1.5◻0.5)Nb2O6(OH) |
| 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.15 | Hydroxycalciomicrolite | Ca1.5Ta2O6(OH) |
| 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) |
| 4.DH.15 | 'Oxycalciobetafite' | Ca2(Ti,Nb)2O6O |
| 4.DH.15 | 'Oxyuranobetafite' | (U,Ca,◻)2(Ti,Nb)2O6O |
| 4.DH.15 | Fluorcalciomicrolite | (Ca,Na)2(Ta,Nb)2O6F |
| 4.DH.15 | Oxycalciomicrolite | Ca2Ta2O6O |
| 4.DH.15 | Oxystannomicrolite | Sn2Ta2O6O |
| 4.DH.15 | Kenoplumbomicrolite | (Pb,◻)2Ta2O6(◻,OH,O) |
| 4.DH.15 | Oxynatromicrolite | (Na,Ca,U)2(Ta,Nb)2O6(O,F) |
| 4.DH.15 | Oxystibiomicrolite | (Sb3+,Ca)2Ta2O6O |
| 4.DH.15 | 'Hydromicrolite' | (H2O,◻)2Ta2(O,OH)6(H2O) |
| 4.DH.15 | 'Plumbomicrolite (of Hogarth 1977)' | |
| 4.DH.15 | Hydrokenomicrolite | (◻,H2O)2Ta2(O,OH)6(H2O) |
| 4.DH.15 | Hydroxykenoelsmoreite | (◻,Pb)2(W,Fe3+,Al)2(O,OH)6(OH) |
| 4.DH.15 va | 'Yttromicrolite (of Hogarth)' | (Ca,Y3+,U,Na)2-x(Ta,Nb,Ti,Fe3+)2O7 |
| 4.DH.15 | Hydroxykenopyrochlore | (◻,Ce,Ba)2(Nb,Ti)2O6(OH,F) |
| 4.DH.15 | Hydroxymanganopyrochlore | (Mn2+,Th,Na,Ca,REE)2(Nb,Ti)2O6(OH) |
| 4.DH.20 | 'Cuproroméite' | Cu2Sb2(O,OH)7 |
| 4.DH.20 | Bindheimite | Pb2Sb2O6O |
| 4.DH.20 | Hydroxyferroroméite | (Fe2+1.5◻0.5)Sb5+2O6(OH) |
| 4.DH.20 | Fluorcalcioroméite | (Ca,Na,◻)2Sb5+2(O,OH)6F |
| 4.DH.20 | Oxycalcioroméite | Ca2Sb2O6O |
| 4.DH.20 | Stetefeldtite | Ag2Sb2(O,OH)7 |
| 4.DH.20 | Stibiconite | Sb3+Sb5+2O6(OH) |
| 4.DH.20 | Monimolite | Pb2Sb5+2O7 |
| 4.DH.25 | Rosiaite | PbSb5+2O6 |
| 4.DH.30 | Stefanweissite | (Ca,REE)2Zr2(Nb,Ti)(Ti,Nb)2Fe2+O14 |
| 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.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) |
Fluorescence of Hydroxycalcioroméite
Not fluorescent in UV
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 Hydroxycalcioroméite
mindat.org URL:
https://www.mindat.org/min-2389.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Hydroxycalcioroméite
Reference List:
Hussak, E., Prior, G. T. (1895) Lewisite and Zirkelite, Two New Brazilian Minerals. Mineralogical Magazine and Journal of the Mineralogical Society, 11 (50) 80-88 doi:10.1180/minmag.1895.011.50.05
Rouse, Roland C, Dunn, Pete J, Peacor, Donald R, Wang, Liping (1998) Structural studies of the natural antimonian pyrochlores: I. Mixed valency, cation site splitting, and symmetry reduction in lewisite. Journal of Solid State Chemistry, 141 (2). 562-569 doi:10.1006/jssc.1998.8019
Zubkova, N.V, Pushcharovsky, D.Yu., Atencio, D, Arakcheeva, A.V, Matioli, P.A (2000) The crystal structure of lewisite, (Ca,Sb3+,Fe3+,Al,Na,Mn,□)2(Sb5+,Ti)2O6(OH). Journal of Alloys and Compounds, 296. 75-79 doi:10.1016/s0925-8388(99)00513-7
Berlepsch, P., Armbruster, T., Brugger, J., Criddle, A. J., Graeser, S. (2003) Tripuhyite, FeSbO4, revisited. Mineralogical Magazine, 67 (1) 31-46 doi:10.1180/0026461036710082
Burke, Ernst A. J. (2006) A mass discreditation of GQN minerals. The Canadian Mineralogist, 44 (6). p.1557-1560. doi:10.2113/gscanmin.44.6.1557
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
Sejkora, J., Ozdín, D., Ďuďa, R. (2010) The supergene mineral association with brandholzite from Pernek, Malé Karpaty Mountains, Slovak Republic. Journal of GEOsciences, 55 (2) 149-160 (with data on A- and B-site occupancies)
Localities for Hydroxycalcioroméite
Showing 20 localities.
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.
Australia | |
| Dieter Mylius collection |
| Birch (2015) |
Austria | |
| Kolitsch (2014) |
| Kolitsch et al. (2021) |
| Kolitsch et al. (2018) |
Brazil | |
| Hussak et al. (1895) +5 other references |
| Hussak et al. (1895) +1 other reference |
Canada | |
| Harris (1989) |
China | |
| Liangming Fan et al. (1983) |
Greece | |
| Rieck et al. (2018) |
New Zealand | |
| Museum Victoria Registration Number: M ... |
North Macedonia | |
| Lopes et al. (2021) |
| Chukanov et al. (2018) | |
Spain | |
| Echevarría Rodríguez Manuel et al. (2025) |
Sweden | |
| Pavel M. Kartashov analytical data (2010) |
USA | |
| Anthony et al. (1995) |
| Steven Kuitems |
| Norman King (photo-id 634925) |
| Rocks & Minerals (1970) +1 other reference |
Vietnam | |
| Shunso Ishihara and Pham Tich Xuan (2013) |
Quick NavTopAbout HydroxycalcioroméiteName EncodingUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
Franklin Mine, Franklin, Sussex County, New Jersey, USA