Hydrokenopyrochlore
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Hydrokenopyrochlore
Formula:
(◻,x)2Nb2O6(H2O,Cs)
x indicates an unspecified minor substituent needed for charge balance.
Colour:
Tan to beige
Lustre:
Resinous
Specific Gravity:
5.08 (Calculated)
Crystal System:
Isometric
Member of:
Name:
From the IMA nomenclature of the pyrochlore supergroup
This page provides mineralogical data about Hydrokenopyrochlore.
Unique Identifiers
Mindat ID:
51831
Long-form identifier:
mindat:1:1:51831:0
GUID
(UUID V4):
(UUID V4):
83f7965a-f9fa-486a-a7bc-3ddba92f4d8f
IMA Classification of Hydrokenopyrochlore
Approved
IMA Formula:
(◻,Sb3+,Na)2Nb2O6 · H2O
Approval year:
2017
First published:
2018
Classification of Hydrokenopyrochlore
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 |
|---|---|---|
| Hkpcl | 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 Hydrokenopyrochlore
Resinous
Colour:
Tan to beige
Streak:
white
Fracture:
Irregular/Uneven
Density:
5.08 g/cm3 (Calculated)
Comment:
Natural material is porous.
Chemistry of Hydrokenopyrochlore
Mindat Formula:
(◻,x)2Nb2O6(H2O,Cs)
x indicates an unspecified minor substituent needed for charge balance.
x indicates an unspecified minor substituent needed for charge balance.
Elements listed:
Crystallography of Hydrokenopyrochlore
Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Fd3m
Setting:
Fd3m
Cell Parameters:
a = 10.4887(8) Å
Unit Cell V:
1153.9 ų
Z:
8
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.677 Å | (w) |
| 3.136 Å | (s) |
| 3.006 Å | (s) |
| 2.598 Å | (w) |
| 2.010 Å | (ms) |
| 1.846 Å | (s) |
| 1.588 Å | (ms) |
| 1.509 Å | (m) |
Comments:
From Type Description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites | |
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] |
Type Occurrence of Hydrokenopyrochlore
General Appearance of Type Material:
Tan to beige subhedral crystals, up to 1mm in size.
Place of Conservation of Type Material:
Type material is deposited in the mineralogical collections of the Musée cantonal de Géologie, University of Lausanne, Switzerland, catalogue numbers MGL 080141 and 080142, and the Museo di Storia Naturale, Università di Pisa, Italy
Empirical Formula of Type Material:
(◻1.32Sb3+0.35Na0.26Ca0.07)Σ2Nb1.47Ta0.28W0.16Sb5+0.05Si0.04)Σ2.00O6[(H2O)0.55Cs0.45]
Chemical Analysis of Type Material:
| WO3 | 8.14 % |
|---|---|
| Sb2O5 (tot) | 14.33 % |
| Nb2O5 | 44.09 % |
| Ta2O5 | 13.97 % |
| SiO2 | 0.51 % |
| SnO2 | 0.21 % |
| CaO | 0.86 % |
| MnO | 0.04 % |
| Na2O | 1.79 % |
| Cs2O | 14.47 % |
| H2O (calc) | 2.23 % |
| Total: | 100.64 % |
Geological Setting of Type Material:
A complex type LCT pegmatite hosted in a metadolomite.
Associated Minerals at Type Locality:
Reference:
Biagioni, C., Meisser, N., Nestola, F., Pasero, M., Bobyr, M., Roth, P., Schnyder, C., Gieré, R. (2018): Hydrokenopyrochlore, (□,#)2Nb2O6·H2O, a new species of the pyrochlore supergroup from the Sahatany Pegmatite Field, Antananarivo Province, Madagascar. European Journal of Mineralogy, 30: 869-876
Synonyms of Hydrokenopyrochlore
Relationship of Hydrokenopyrochlore 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 | |
| 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) | |
| Oxycalciopyrochlore | Ca2Nb2O6O | Iso. m3m (4/m 3 2/m) : Fd3m |
| 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) |
Common Associates
Associated Minerals Based on Photo Data:
| 4 photos of Hydrokenopyrochlore associated with Elbaite-Schorl Series | |
| 4 photos of Hydrokenopyrochlore associated with Rubellite | A(D3)G6(T6O18)(BO3)3X3Z |
| 1 photo of Hydrokenopyrochlore associated with Tourmaline | AD3G6 (T6O18)(BO3)3X3Z |
| 1 photo of Hydrokenopyrochlore associated with Albite | Na(AlSi3O8) |
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 | Oxycalciopyrochlore | Ca2Nb2O6O |
| 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 | 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 Hydrokenopyrochlore
mindat.org URL:
https://www.mindat.org/min-51831.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 Hydrokenopyrochlore
Localities for Hydrokenopyrochlore
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.
Madagascar (TL) | |
| Mineralogical Magazine +3 other references |
Slovakia | |
| Uher P. et al. (2018) |
Quick NavTopAbout HydrokenopyrochloreUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsRelationshipsCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Antandrokomby pegmatite, Manandona Valley, Sahatsiho Ambohimanjaka, Ambositra, Amoron'i Mania, Madagascar