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Hydrokenopyrochlore

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About HydrokenopyrochloreHide

Formula:
(□,□)2Nb2O6·H2O
Colour:
Tan to beige
Lustre:
Resinous
Crystal System:
Isometric
This page provides mineralogical data about Hydrokenopyrochlore.


Classification of HydrokenopyrochloreHide

Approved
Approval Year:
2017
First Published:
2018

Physical Properties of HydrokenopyrochloreHide

Resinous
Colour:
Tan to beige

Chemical Properties of HydrokenopyrochloreHide

Formula:
(□,□)2Nb2O6·H2O
IMA Formula:
2Nb2O4(OH)2(H2O)

Crystallography of HydrokenopyrochloreHide

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 DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.677(w)
3.136(s)
3.006(s)
2.598(w)
2.010(ms)
1.846(s)
1.588(ms)
1.509(m)
Comments:
From Type Description.

Occurrences of HydrokenopyrochloreHide

Paragenetic Mode(s):

Type Occurrence of HydrokenopyrochloreHide

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+0.35Na0.26Ca0.072Nb1.47Ta0.28W0.16Sb5+0.05Si0.042.00O6[(H2O)0.55Cs0.45]
Chemical Analysis of Type Material:
WO38.14 %
Sb2O5 (tot)14.33 %
Nb2O544.09 %
Ta2O513.97 %
SiO20.51 %
SnO20.21 %
CaO0.86 %
MnO0.04 %
Na2O1.79 %
Cs2O14.47 %
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 HydrokenopyrochloreHide

Relationship of Hydrokenopyrochlore to other SpeciesHide

Other Members of this group:
Cesiokenopyrochlore□Nb2(O,OH)6Cs1−x (x ∼ 0.20)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.
Fluorkenopyrochlore(□,Sr,Ce,Ca,Na)2(Nb,Ti)2O6F
Fluornatropyrochlore(Na,Pb,Ca,REE,U)2Nb2O6FIso. m3m (4/m 3 2/m)
Fluorplumbopyrochlore(Pb,Y,Th,U,Na,Ca)2-x(Nb,Ti)2O6FIso.
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,Сa,Ce)2Nb2O6(OH)Iso. m3m (4/m 3 2/m) : Fd3m
Hydroxyplumbopyrochlore(Pb,Ca)2-x(Nb,Ti,Ta)2O6(OH)
Kenoplumbopyrochlore(Pb,□)Nb2O6(□,O)
OxycalciopyrochloreCa2Nb2O6OIso. m3m (4/m 3 2/m) : Fd3m
Oxynatropyrochlore(Na,Ca,U)2Nb2O6(O,OH)
OxyplumbopyrochlorePb2Nb2O6O
Oxyyttropyrochlore-(Y)(Y,◻)2Nb2O6O
Unnamed (Sb-analogue of Hydroxymanganopyrochlor)(Mn,Ca,Y)2(Sb,Ti)2O6(OH)

Other InformationHide

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 HydrokenopyrochloreHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Biagioni, C., Gieré, R.,Meisser, N., Nestola, F., Pasero, M., Robyr, M., Roth, P. and Schnyder, C. (2017) Hydrokenopyrochlore, IMA 2017-005. CNMNC Newsletter No. 37, June 2017, page 739; Mineralogical Magazine: 81: 737–742.
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

Internet Links for HydrokenopyrochloreHide

Localities for HydrokenopyrochloreHide

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.
Madagascar (TL)
 
  • Amoron'i Mania
    • Ambositra
      • Sahatsiho-Ambohimanjaka
        • Manandona Valley
Biagioni, C., Gieré, R.,Meisser, N., Nestola, F., Pasero, M., Robyr, M., Roth, P. and Schnyder, C. (2017) Hydrokenopyrochlore, IMA 2017-005. CNMNC Newsletter No. 37, June 2017, page 739; Mineralogical Magazine, 81, 737–742; 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
Slovakia
 
  • Košice Region
    • Rožňava Co.
      • Dobšiná mining district (Dobschau; Topschau)
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.
Mineral and/or Locality  
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