Named according to the International Mineralogical Association recommended nomenclature for pyrochlore supergroup minerals, to indicate hydroxyl and sodium content.

Type Locality:

ⓘ Phoscorite-carbonatite pipe, Kovdor Massif, Murmansk Oblast, Russia

This page provides mineralogical data about Hydroxynatropyrochlore.

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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

IMA status:

Approved

Approval year:

2017

First published:

2019

Type description 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.

Classification of HydroxynatropyrochloreHide

Strunz-mindat (2024):

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.

Symbol	Source	Reference
Hnpcl	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 HydroxynatropyrochloreHide

Lustre:

Adamantine, Greasy

Transparency:

Transparent, Translucent

Colour:

Pale-brown

Streak:

White

Hardness:

5 on Mohs scale

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)

Elements listed:

Ca, Ce, H, Na, Nb, O - search for minerals with similar chemistry

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 Å³

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-spacing	Intensity
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 Mode	Earliest 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

Type Locality:

ⓘ Phoscorite-carbonatite pipe, Kovdor Massif, Murmansk Oblast, Russia

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:

Synonyms of HydroxynatropyrochloreHide

IMA2017-074

Relationship of Hydroxynatropyrochlore to other SpeciesHide

Member of:

Pyrochlore Group > Pyrochlore Supergroup

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
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	(Pb_1.5◻_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)

Related Minerals - Strunz-mindat Grouping Hide

4.DH.	Fluornatropyrochlore	(Na,Pb,Ca,REE,U)₂Nb₂O₆F	Iso. m3m (4/m 3 2/m)
4.DH.	Roméite Group	A₂(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.	Oxyplumboroméite	Pb₂Sb₂O₆O	Iso. 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)	Y₂Ti₂O₆O	Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.05	Brannerite	UTi₂O₆	Mon. 2/m : B2/m
4.DH.05	Orthobrannerite	U⁴⁺U⁶⁺Ti₄O₁₂(OH)₂	Orth.
4.DH.05	Thorutite	(Th,U,Ca)Ti₂(O,OH)₆	Mon.
4.DH.10	Kassite	CaTi₂O₄(OH)₂	Mon. 2/m : P2₁/b
4.DH.10	Lucasite-(Ce)	CeTi₂(O,OH)₆	Mon.
4.DH.15 va	Alumotungstite	◻₂W₂O₆(H₂O)	Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15	Bismutomicrolite (of Hogarth 1977)		Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15	Hydroplumboelsmoreite	(Pb,◻)(W,Fe³⁺)₂O₆ · H₂O	Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15	Hydropyrochlore	(H₂O,◻)₂Nb₂(O,OH)₆(H₂O)	Iso. m3m (4/m 3 2/m) : Fd3m
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	(Na_1.5Bi_0.5)Ta₂O₆F	Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15	Bismutopyrochlore (of Chukanov et al.)	(Bi,Ca,U,Pb)_2-xNb₂(O,OH)₆(OH)	Amor.
4.DH.15	Hydrokenoelsmoreite	◻₂W₂O₆(H₂O)	Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15	Fluorcalciomicrolite	(Ca,Na)₂(Ta,Nb)₂O₆F	Iso. m3m (4/m 3 2/m) : Fd3m
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	Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15	Oxynatropyrochlore	(Na,Ca,U)₂Nb₂O₆(O,OH)
4.DH.15	Hydroxycalciopyrochlore	(Ca,Na,U,◻)₂(Nb,Ti)₂O₆(OH)	Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15	Fluorcalciopyrochlore	(Ca,Na)₂(Nb, Ti)₂O₆F	Iso.
4.DH.15	Oxycalciopyrochlore	Ca₂Nb₂O₆O	Iso. m3m (4/m 3 2/m) : Fd3m
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	Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15	Oxystannomicrolite	Sn₂Ta₂O₆O	Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15	Kenoplumbomicrolite	(Pb,◻)₂Ta₂O₆(◻,OH,O)	Iso.
4.DH.15	Oxystibiomicrolite	(Sb³⁺,Ca)₂Ta₂O₆O	Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15	Hydromicrolite	(H₂O,◻)₂Ta₂(O,OH)₆(H₂O)
4.DH.15	Hydrokenomicrolite	(◻,H₂O)₂Ta₂(O,OH)₆(H₂O)	Iso. m3m (4/m 3 2/m)
4.DH.15	Hydroxymanganopyrochlore	(Mn²⁺,Th,Na,Ca,REE)₂(Nb,Ti)₂O₆(OH)	Iso. m3 (2/m 3)
4.DH.15	Hydroxycalciomicrolite	Ca_1.5Ta₂O₆(OH)	Iso. 4 3 2 : P4₂ 3 2
4.DH.15	Fluorplumbopyrochlore	(Pb,Y,Th,U,Na,Ca)_2-x(Nb,Ti)₂O₆F	Iso.
4.DH.15	Hydroxyplumbopyrochlore	(Pb_1.5◻_0.5)Nb₂O₆(OH)	Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15	Oxynatromicrolite	(Na,Ca,U)₂(Ta,Nb)₂O₆(O,F)	Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15	Fluorhydropyrochlore
4.DH.15	Hydroxykenoelsmoreite	(◻,Pb)₂(W,Fe³⁺,Al)₂(O,OH)₆(OH)	Trig. 3 : R3
4.DH.15	Hydrokenopyrochlore	(◻,x)₂Nb₂O₆(H₂O,Cs)	Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15	Hydroxykenopyrochlore	(◻,Ce,Ba)₂(Nb,Ti)₂O₆(OH,F)	Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15	Hydroxynatromicrolite	(Na,Bi³⁺,◻)₂Ta₂O₆(OH)	Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.15	Unnamed (Sb-analogue of Hydroxymanganopyrochlor)	(Mn,Ca,Y)₂(Sb,Ti)₂O₆(OH)
4.DH.15	Oxybismutomicrolite	(Bi_1.33◻_0.67)_Σ2Ta₂O₆O	Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.20	Bindheimite	Pb₂Sb₂O₆O	Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.20	Hydroxycalcioroméite	(Ca,Sb³⁺)₂(Sb⁵⁺,Ti)₂O₆(OH)	Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.20	Monimolite	Pb₂Sb⁵⁺₂O₇	Iso. m3m (4/m 3 2/m)
4.DH.20	Cuproroméite	Cu₂Sb₂(O,OH)₇	Iso.
4.DH.20	Stetefeldtite	Ag₂Sb₂(O,OH)₇	Iso.
4.DH.20	Stibiconite	Sb³⁺Sb⁵⁺₂O₆(OH)	Iso. m3m (4/m 3 2/m)
4.DH.20	Fluorcalcioroméite	(Ca,Na,◻)₂Sb⁵⁺₂(O,OH)₆F	Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.20	Oxycalcioroméite	Ca₂Sb₂O₆O	Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.20	Hydroxyferroroméite	(Fe²⁺_1.5◻_0.5)Sb⁵⁺₂O₆(OH)	Iso. m3m (4/m 3 2/m) : Fd3m
4.DH.25	Rosiaite	PbSb⁵⁺₂O₆	Trig. 3m (3 2/m) : P3 1m
4.DH.30	Zirconolite	CaZrTi₂O₇	Orth.
4.DH.30	Laachite	(Ca,Mn)₂Zr₂Nb₂TiFeO₁₄	Mon. 2/m : B2/b
4.DH.30	Nöggerathite-(Ce)	(Ce,Ca)₂Zr₂(Nb,Ti)(Ti,Nb)₂Fe²⁺O₁₄	Orth. mmm (2/m 2/m 2/m) : Cmca
4.DH.30	Stefanweissite	(Ca,REE)₂Zr₂(Nb,Ti)(Ti,Nb)₂Fe²⁺O₁₄	Orth. mmm (2/m 2/m 2/m) : Cmca
4.DH.35	Liandratite	U(Nb,Ta)₂O₈	Trig. 3m (3 2/m) : P3 1m
4.DH.35	Petscheckite	UFe(Nb,Ta)₂O₈	Hex.
4.DH.40	Ingersonite	Ca₃Mn²⁺Sb⁵⁺₄O₁₄	Trig. 3 2 : P3₁ 2 1
4.DH.45	Pittongite	Na_0.22(W,Fe³⁺)(O,OH)₃ · 0.44H₂O	Hex. 6 m2 : P6m2
4.DH.50	Tazzoliite	Ba_4-xNa_xTi₂Nb₃SiO₁₇[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

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Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

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References for HydroxynatropyrochloreHide

Reference List:

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

Hålenius, U., Hatert, F., Pasero, M., Mills, S. J. (2017) New minerals and nomenclature modifications approved in 2017, CNMNC Newsletter No 40. Mineralogical Magazine, 81 (6) 1577-1581 doi:10.1180/minmag.2017.081.096

(2023) Hydroxynatropyrochlore. Handbook of Mineralogy. Mineralogical Society of America

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 ⓘ Poudrette quarry (De-Mix quarry; Demix quarry; Uni-Mix quarry; Carrière Mont Saint-Hilaire; MSH)	Horváth et al. (2019)

Portugal
Madeira Madeira Island Machico Porto da Cruz ⓘ Terra do Baptista gabbro outcrop	Pedro Alves collection and analytical ...

Russia
Chelyabinsk Oblast Ilmen Mountains ⓘ Ilmenogorsky alkaline complex	Makagonov et al. (2017)
Murmansk Oblast ⓘ Kovdor Massif	Ivanyuk et al. (2018)
ⓘ Phoscorite-carbonatite pipe (TL)	Ivanyuk et al. (2018) +1 other reference

Valleriite	Valleriite	Strontianite	Spinel	Quintinite
Pyrrhotite	Pyrite	Phlogopite	Magnetite	Magnesite
Juonniite	Ilmenite	Hydroxylapatite	Gladiusite	Galena
Forsterite	Dolomite	Chalcopyrite	Chalcopyrite	Calcite
Barytocalcite	Baryte	Baddeleyite

Hydroxynatropyrochlore