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Hydroxynatropyrochlore

A valid IMA mineral species
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Formula:
(Na,Ca,Ce)2Nb2O6(OH)
Colour:
Pale-brown
Lustre:
Adamantine, Greasy
Hardness:
5
Specific Gravity:
4.60
Crystal System:
Isometric
Name:
Named according to the International Mineralogical Association recommended nomenclature for pyrochlore supergroup minerals, to indicate hydroxyl and sodium content.
This page provides mineralogical data about Hydroxynatropyrochlore.


Hide all sections | Show all sections

Unique IdentifiersHide

Mindat ID:
52584
Long-form identifier:
mindat:1:1:52584:2
GUID
(UUID V4):
09e346b4-2808-42fa-8d54-d06afea37ff2

IMA Classification of HydroxynatropyrochloreHide

Classification of HydroxynatropyrochloreHide

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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
HnpclIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of HydroxynatropyrochloreHide

Adamantine, Greasy
Transparency:
Transparent, Translucent
Colour:
Pale-brown
Streak:
White
Hardness:
Cleavage:
Distinct/Good
'Average' on {111}
Parting:
None observed
Fracture:
Conchoidal
Density:
4.60(5) g/cm3 (Measured)    4.77 g/cm3 (Calculated)
Comment:
Measured using float-sink method in Clerici solution

Optical Data of HydroxynatropyrochloreHide

Chemistry of HydroxynatropyrochloreHide

Mindat Formula:
(Na,Ca,Ce)2Nb2O6(OH)

Crystallography of HydroxynatropyrochloreHide

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Fd3m
Setting:
Fd3m
Cell Parameters:
a = 10.3276(5) Å
Unit Cell V:
1101.5 ų
Z:
8
Morphology:
Cubes and truncated octahedrons
Twinning:
None observed
Comment:
a above from single crystal; a=10.3211(3) from powder diffraction

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.96 Å(47)
3.110 Å(30)
2.580 Å(100)
2.368 Å(19)
1.987 Å(6)
1.826 Å(25)
1.746 Å(3)
1.556 Å(14)
Comments:
From Type Description.

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 4b: Highly evolved igneous rocks>3.0
35 : Ultra-alkali and agpaitic igneous rocks
36 : Carbonatites, kimberlites, and related igneous rocks

Type Occurrence of HydroxynatropyrochloreHide

General Appearance of Type Material:
Zonal cubic or cubo-octahedral crystals (up to 0.5 mm in diameter) with irregularly shaped relics of amorphous U-Ta-rich hydroxykenopyrochlore inside.
Place of Conservation of Type Material:
Type material is deposited in the collections of the Mineralogical Museum, Saint-Petersburg State University, University Emb. 7/9, St. Petersburg 199034, Russia, catalogue number 1/19679
Associated Minerals at Type Locality:
Reference:
Ivanyuk, G.Y., Yakovenchuk, V.N., Panikorovskii, T.L., Konoplyova, N., Pakhomovsky, Y.A., Bazai, A.V., Bocharov, V.N., Krivovichev, S.V. (2019) Hydroxynatropyrochlore, (Na,Сa,Ce)2Nb2O6(OH), a new member of the pyrochlore group from the Kovdor phoscorite–carbonatite pipe, Kola Peninsula, Russia. Mineralogical Magazine: 83(1): 107-113.

Synonyms of HydroxynatropyrochloreHide

Relationship of Hydroxynatropyrochlore 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.
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
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)
Hydroxyplumbopyrochlore (Pb1.50.5)Nb2O6(OH)Iso. m3m (4/m 3 2/m) : Fd3m
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)

Related Minerals - Strunz-mindat GroupingHide

4.DH.Fluornatropyrochlore(Na,Pb,Ca,REE,U)2Nb2O6FIso. m3m (4/m 3 2/m)
4.DH.Roméite GroupA2(Sb5+)2O6Z
4.DH.Hydroxykenomicrolite(◻,Na,Sb3+)2Ta2O6(OH)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.Fluornatroroméite(Na,Ca)2Sb2(O,OH)6F
4.DH.OxyplumboroméitePb2Sb2O6OIso. m3m (4/m 3 2/m) : Fd3m
4.DH.Cesiokenopyrochlore◻Nb2(O,OH)6(Cs,◻) Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.Oxyyttrobetafite-(Y)Y2Ti2O6OIso. m3m (4/m 3 2/m) : Fd3m
4.DH.05BranneriteUTi2O6Mon. 2/m : B2/m
4.DH.05OrthobranneriteU4+U6+Ti4O12(OH)2Orth.
4.DH.05Thorutite(Th,U,Ca)Ti2(O,OH)6Mon.
4.DH.10KassiteCaTi2O4(OH)2Mon. 2/m : P21/b
4.DH.10Lucasite-(Ce)CeTi2(O,OH)6Mon.
4.DH.15 vaAlumotungstite2W2O6(H2O)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Bismutomicrolite (of Hogarth 1977)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Hydroplumboelsmoreite(Pb,◻)(W,Fe3+)2O6 · H2OIso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Hydropyrochlore(H2O,◻)2Nb2(O,OH)6(H2O)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Plumbomicrolite (of Hogarth 1977)
4.DH.15Stibiomicrolite (of Groat et al.)
4.DH.15Strontiopyrochlore (of Hogarth 1977)A2Nb2(O,OH)6Z
4.DH.15Fluornatromicrolite(Na1.5Bi0.5)Ta2O6FIso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Bismutopyrochlore (of Chukanov et al.)(Bi,Ca,U,Pb)2-xNb2(O,OH)6(OH)Amor.
4.DH.15Hydrokenoelsmoreite2W2O6(H2O)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Fluorcalciomicrolite(Ca,Na)2(Ta,Nb)2O6FIso. m3m (4/m 3 2/m) : Fd3m
4.DH.15OxycalciobetafiteCa2(Ti,Nb)2O6O
4.DH.15 vaYttromicrolite (of Hogarth)(Ca,Y3+,U,Na)2-x(Ta,Nb,Ti,Fe3+)2O7Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Oxynatropyrochlore(Na,Ca,U)2Nb2O6(O,OH)
4.DH.15Hydroxycalciopyrochlore(Ca,Na,U,◻)2(Nb,Ti)2O6(OH)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Fluorcalciopyrochlore(Ca,Na)2(Nb, Ti)2O6FIso.
4.DH.15OxycalciopyrochloreCa2Nb2O6OIso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Fluorstrontiopyrochlore(Sr,◻)2Nb2(O,OH)6F
4.DH.15OxyplumbopyrochlorePb2Nb2O6O
4.DH.15Kenoplumbopyrochlore(Pb,◻)Nb2O6(◻,O)
4.DH.15Oxyyttropyrochlore-(Y)(Y,◻)2Nb2O6O
4.DH.15Fluorkenopyrochlore(◻,Sr,Ce,Ca,Na)2(Nb,Ti)2O6F
4.DH.15Oxyuranobetafite(U,Ca,◻)2(Ti,Nb)2O6O
4.DH.15OxycalciomicroliteCa2Ta2O6OIso. m3m (4/m 3 2/m) : Fd3m
4.DH.15OxystannomicroliteSn2Ta2O6OIso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Kenoplumbomicrolite(Pb,◻)2Ta2O6(◻,OH,O)Iso.
4.DH.15Oxystibiomicrolite(Sb3+,Ca)2Ta2O6OIso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Hydromicrolite(H2O,◻)2Ta2(O,OH)6(H2O)
4.DH.15Hydrokenomicrolite(◻,H2O)2Ta2(O,OH)6(H2O)Iso. m3m (4/m 3 2/m)
4.DH.15Hydroxymanganopyrochlore(Mn2+,Th,Na,Ca,REE)2(Nb,Ti)2O6(OH) Iso. m3 (2/m 3)
4.DH.15HydroxycalciomicroliteCa1.5Ta2O6(OH)Iso. 4 3 2 : P42 3 2
4.DH.15Fluorplumbopyrochlore(Pb,Y,Th,U,Na,Ca)2-x(Nb,Ti)2O6FIso.
4.DH.15Hydroxyplumbopyrochlore (Pb1.50.5)Nb2O6(OH)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Oxynatromicrolite(Na,Ca,U)2(Ta,Nb)2O6(O,F)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Fluorhydropyrochlore
4.DH.15Hydroxykenoelsmoreite(◻,Pb)2(W,Fe3+,Al)2(O,OH)6(OH)Trig. 3 : R3
4.DH.15Hydrokenopyrochlore(◻,x)2Nb2O6(H2O,Cs)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Hydroxykenopyrochlore(◻,Ce,Ba)2(Nb,Ti)2O6(OH,F)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Hydroxynatromicrolite(Na,Bi3+,◻)2Ta2O6(OH)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15Unnamed (Sb-analogue of Hydroxymanganopyrochlor)(Mn,Ca,Y)2(Sb,Ti)2O6(OH)
4.DH.15Oxybismutomicrolite(Bi1.330.67)Σ2Ta2O6OIso. m3m (4/m 3 2/m) : Fd3m
4.DH.20BindheimitePb2Sb2O6OIso. m3m (4/m 3 2/m) : Fd3m
4.DH.20Hydroxycalcioroméite(Ca,Sb3+)2(Sb5+,Ti)2O6(OH)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.20MonimolitePb2Sb5+2O7Iso. m3m (4/m 3 2/m)
4.DH.20CuproroméiteCu2Sb2(O,OH)7Iso.
4.DH.20StetefeldtiteAg2Sb2(O,OH)7Iso.
4.DH.20StibiconiteSb3+Sb5+2O6(OH) Iso. m3m (4/m 3 2/m)
4.DH.20Fluorcalcioroméite(Ca,Na,◻)2Sb5+2(O,OH)6FIso. m3m (4/m 3 2/m) : Fd3m
4.DH.20OxycalcioroméiteCa2Sb2O6OIso. m3m (4/m 3 2/m) : Fd3m
4.DH.20Hydroxyferroroméite(Fe2+1.50.5)Sb5+2O6(OH)Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.25RosiaitePbSb5+2O6Trig. 3m (3 2/m) : P3 1m
4.DH.30ZirconoliteCaZrTi2O7Orth.
4.DH.30Laachite(Ca,Mn)2Zr2Nb2TiFeO14Mon. 2/m : B2/b
4.DH.30Nöggerathite-(Ce)(Ce,Ca)2Zr2(Nb,Ti)(Ti,Nb)2Fe2+O14Orth. mmm (2/m 2/m 2/m) : Cmca
4.DH.30Stefanweissite(Ca,REE)2Zr2(Nb,Ti)(Ti,Nb)2Fe2+O14Orth. mmm (2/m 2/m 2/m) : Cmca
4.DH.35LiandratiteU(Nb,Ta)2O8Trig. 3m (3 2/m) : P3 1m
4.DH.35PetscheckiteUFe(Nb,Ta)2O8Hex.
4.DH.40IngersoniteCa3Mn2+Sb5+4O14Trig. 3 2 : P31 2 1
4.DH.45PittongiteNa0.22(W,Fe3+)(O,OH)3 · 0.44H2OHex. 6 m2 : P6m2
4.DH.50TazzoliiteBa4-xNaxTi2Nb3SiO17[PO2(OH)2]x(OH)(1-2x) Orth. mmm (2/m 2/m 2/m) : Fmmm

Other InformationHide

Notes:
Slowly dissolves in hot HCl
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 HydroxynatropyrochloreHide

References for HydroxynatropyrochloreHide

Localities for HydroxynatropyrochloreHide

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 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.
Canada
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
Horváth et al. (2019)
Portugal
 
  • Madeira
    • Madeira Island
      • Machico
        • Porto da Cruz
Pedro Alves collection and analytical ...
Russia
 
  • Chelyabinsk Oblast
    • Ilmen Mountains
Makagonov et al. (2017)
  • Murmansk Oblast
Ivanyuk et al. (2018)
Ivanyuk et al. (2018) +1 other reference
 
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