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Loparite

A valid IMA mineral species - grandfathered
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About LopariteHide

Formula:
(Na,REE)2Ti2O6
Colour:
Black to grayish black
Lustre:
Metallic, Sub-Metallic
Hardness:
Specific Gravity:
4.60 - 4.89
Crystal System:
Isometric
Name:
From the Russian name for the Saami or Lapp people, Lopar', the indigenous people of the Kola peninsula. It was first reported from the Lovozero massif, Kola, Russia by W. Ramsay in 1890 as " new mineral no.1". The name was changed from loparite to loparite-(Ce) by the IMA in 1987, although Mitchell et al. (2000) argue that "given the disordered distribution of cations in the structure of this mineral, the use of Levinson modifiers to indicate the dominant REE species is clearly unwarranted."
This page provides mineralogical data about Loparite.


Unique IdentifiersHide

Mindat ID:
2432
Long-form identifier:
mindat:1:1:2432:3

Similar NamesHide

IMA Classification of LopariteHide

Approved, 'Grandfathered' (first described prior to 1959)
IMA status notes:
Renamed by the IMA
IMA Formula:
(Na0.5Ce3+0.5)Ti4+O3
Approval year:
1983
First published:
1925
Approval history:
Renamed as loparite-(Ce) by IMA in 1987, special procedure. Name changed back to loparite by IMA in 2024 by procedure 2024-4.1

Classification of LopariteHide

4.CC.35

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
C : Metal: Oxygen = 2: 3,3: 5, and similar
C : With large and medium-sized cations
4.3.3.3

4 : SIMPLE OXIDES
3 : A2X3
18.2.11

18 : Niobates and Tantalates
2 : Niobates and tantalates containing rare earths but not U

Mineral SymbolsHide

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

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

SymbolSourceReference for Standard
LopIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
LopThe Canadian Mineralogist (2019)The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download

Physical Properties of LopariteHide

Metallic, Sub-Metallic
Transparency:
Opaque
Colour:
Black to grayish black
Streak:
Cinnamon-brown to brown
Hardness:
5½ on Mohs scale
Hardness:
VHN100=908 - 1402 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
Imperfect/Fair
{100}
Fracture:
Irregular/Uneven
Density:
4.60 - 4.89 g/cm3 (Measured)    4.85(10) g/cm3 (Calculated)

Optical Data of LopariteHide

Type:
Isotropic
RI values:
n = 2.26 - 2.38
Surface Relief:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).

This shows the grain boundary and Becke line effect under plane-polarised light, based on the contrast between this mineral's average refractive index and the mounting medium. It does not take into account mineral colouration.
In focus
Reflectivity:
WavelengthR1 (%)
400nm18.8%
420nm18.2%
440nm17.8%
460nm17.3%
480nm17.0%
500nm16.8%
520nm16.6%
540nm16.4%
560nm16.3%
580nm16.1%
600nm16.1%
620nm16.0%
640nm15.9%
660nm15.9%
680nm15.9%
700nm15.8%


Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 18.8%.
Colour in reflected light:
light gray or white with a creamy tinge
Internal Reflections:
brownish red
Comments:
dark brown in thin section, may be zoned;
anomalously anisotropic

Chemistry of LopariteHide

Mindat Formula:
(Na,REE)2Ti2O6
Element Weights:
Element% weight
O40.384 %
Ti40.274 %
Na19.343 %

Calculated from ideal end-member formula.

Crystallography of LopariteHide

Crystal System:
Isometric
Class (H-M):
m3m(4/m32/m) - Hexoctahedral
Cell Parameters:
a = 3.87(2) Å
Unit Cell V:
57.96 ų (Calculated from Unit Cell)
Z:
1
Twinning:
Commonly as penetration twins on {111}
Comment:
Pm3m

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0005641LopariteMitchell R H, Burns P C, Chakhmouradian A R (2000) The crystal structures of loparite-(Ce) The Canadian Mineralogist 38 145-1522000Bearpaw Mountains, Montana, USA0293
0005640LopariteMitchell R H, Burns P C, Chakhmouradian A R (2000) The crystal structures of loparite-(Ce) The Canadian Mineralogist 38 145-1522000Lovozero complex, Russia0293
0005639LopariteMitchell R H, Burns P C, Chakhmouradian A R (2000) The crystal structures of loparite-(Ce) The Canadian Mineralogist 38 145-1522000Khibina complex, Russia0293
0017915LopariteGaertner H (1930) Die Kristallstrukturen von Loparit und Pyrochlor _cod_database_code 1011000 Neues Jahrbuch fur Mineralogie, Geologie und Palaeontologie. Beilage 61 1-3019300293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.749 Å(100)
1.583 Å(100)
1.226 Å(100)
1.936 Å(90)
1.373 Å(90)
1.120 Å(40)
2.244 Å(20)
Comments:
Kola Peninsula, Russia.

Geological EnvironmentHide

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

Type Occurrence of LopariteHide

General Appearance of Type Material:
As cubic or octahedral crystals, to 2 cm, which may be highly modified; overgrowing perovskite and massive
Place of Conservation of Type Material:
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 21043–21045.
Associated Minerals at Type Locality:

Synonyms of LopariteHide

Other Language Names for LopariteHide

Varieties of LopariteHide

NiobolopariteA variety of loparite containing niobium.

Relationship of Loparite to other SpeciesHide

Other Members of Perovskite Subgroup:
BarioperovskiteBaTiO3Orth. mm2 : Amm2
GoldschmidtiteKNbO3Iso. m3m(4/m32/m) : Pm3m
Isolueshite(Na,La)NbO3Iso. m3m(4/m32/m) : Pm3m
LakargiiteCa(Zr,Sn,Ti)O3Orth. mmm(2/m2/m2/m) : Pnma
LueshiteNaNbO3Orth. mmm(2/m2/m2/m)
MacedonitePbTiO3Tet. 4/mmm(4/m2/m2/m) : P4/nmm
MegawiteCaSnO3Orth. mmm(2/m2/m2/m) : Pban
PerovskiteCaTiO3Orth. mmm(2/m2/m2/m) : Pnma
TausoniteSrTiO3Iso. 43m

Common AssociatesHide

Associations Based on Photo Data:
13 photos of Loparite associated with AegirineNaFe3+Si2O6
6 photos of Loparite associated with AlbiteNa(AlSi3O8)
6 photos of Loparite associated with EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
4 photos of Loparite associated with TitaniteCaTiO(SiO4)
2 photos of Loparite associated with KyanoxaliteNa7(Al6-xSi6+xO24)(C2O4)0.5+x · 5H2O (0 < x < 0.5)
1 photo of Loparite associated with Kentbrooksite(Na,REE)15(Ca,REE)6(Mn2+,Fe2+)3Zr3Nb[Si25O74]F2 · 2H2O
1 photo of Loparite associated with LorenzeniteNa2Ti2(Si2O6)O3
1 photo of Loparite associated with PerovskiteCaTiO3
1 photo of Loparite associated with Anzaite-(Ce)Ce3+ 4Fe2+Ti6O18 (OH)2
1 photo of Loparite associated with ParalomonosoviteNa64Ti4(Si2O7)2[PO3OH][PO2(OH)2]O2(OF)

Related Minerals - Strunz-mindat GroupingHide

4.CC.XuiteCa3Fe3+2[(AlO3(OH)]3Iso. m3m(4/m32/m)
4.CC.Yttriaite-(Y)Y2O3Iso. m3(2/m3)
4.CC.AllendeiteSc4Zr3O12Trig. 3 : R3
4.CC.ChlorkyuygeniteCa12Al14O32[(H2O)4Cl2]Iso. 43m : I43d
4.CC.OboniobiteMg4Nb2O9Trig. 3m(32/m) : P3c1
4.CC.BotuobinskiteSrFe2+Mg2(Cr3+6Ti4+12)[O36(OH)2]Trig. 3 : R3
4.CC.MirnyiteSrZr4+Mg2(Cr3+6Ti4+12)O38Trig. 3 : R3
4.CC.Haitaite-(La)LaU4+Fe3+2(Ti13Fe2+4Fe3+)O38Trig. 3 : R3
4.CC.ShagamiteKFe11O17Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.BitikleiteCa3(Sb5+Sn4+)[AlO4]3Iso. m3m(4/m32/m) : Ia3d
4.CC.Anzaite-(Ce)Ce3+ 4Fe2+Ti6O18 (OH)2Mon. 2/m : B2/m
4.CC.Heamanite-(Ce)(K0.5Ce0.5)TiO3Iso. m3m(4/m32/m)
4.CC.Priscillagrewite-(Y)(Ca2Y)Zr2(AlO4)3Iso.
4.CC.StranditePb3Mn3+4Mn4+3O15Hex. 6/mmm(6/m2/m2/m) : P63/mcm
4.CC.SaranovskiteSrCaFe2+2(Cr4Ti2)Ti12O38Trig. 3 : R3
4.CC.05ChrombismiteBi3+16Cr6+O27Iso. m3m(4/m32/m)
4.CC.10FreudenbergiteNa2(Ti,Fe)8O16Mon.
4.CC.10FluormayeniteCa12Al14O32F2Iso. 43m : I43d
4.CC.10FluorkyuygeniteCa12Al14O32[(H2O)4F2]Iso. 43m : I43d
4.CC.15GrossiteCaAl4O7Mon. 2/m : B2/b
4.CC.17GoldschmidtiteKNbO3Iso. m3m(4/m32/m) : Pm3m
4.CC.20'Unnamed (HBU UK-4)'NaFe2+Zn2(Ti,Fe3+,Nb)6Ti12O38Trig. 3 : R3
4.CC.20ChlormayeniteCa12Al14O32[◻4Cl2]Iso. 43m : I43d
4.CC.20PaseroitePbMn2+(Mn2+,Fe3+)2(V5+,Ti,◻)18O38 Trig. 3 : R3
4.CC.20Mianningite(◻,Pb,Ce,Na)(U4+,Mn,U6+)Fe3+2 (Ti,Fe3+)18O38Trig. 3 : R3
4.CC.20'UM1987-03-O:FePbTiU'~(U,Pb)(Ti,Fe3+,Fe2+,Mn)21O38Trig. 3 : R3
4.CC.22GoreriteCaAlFe3+11O19Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.22KahlenbergiteKAl11O17Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.25HopmanniteBa2(Ti5Fe)O13Mon. 2/m : B2/m
4.CC.25NixoniteNa2Ti6O13Mon. 2/m : B2/m
4.CC.25YafsoaniteCa3Te6+2(ZnO4)3Iso. m3m(4/m32/m) : Ia3d
4.CC.30LatrappiteCa2NbFe3+O6Orth. mmm(2/m2/m2/m) : Pnma
4.CC.30NatroniobiteNaNbO3Mon.
4.CC.30PerovskiteCaTiO3Orth. mmm(2/m2/m2/m) : Pnma
4.CC.30LueshiteNaNbO3Orth. mmm(2/m2/m2/m)
4.CC.30BariolakargiiteBaZrO3Iso. m3m(4/m32/m) : Pm3m
4.CC.30BarioperovskiteBaTiO3Orth. mm2 : Amm2
4.CC.30MegawiteCaSnO3Orth. mmm(2/m2/m2/m) : Pban
4.CC.30LakargiiteCa(Zr,Sn,Ti)O3Orth. mmm(2/m2/m2/m) : Pnma
4.CC.32UsturiteCa3(Sb5+Zr)[Fe3+O4]3Iso. m3m(4/m32/m) : Ia3d
4.CC.32ElbrusiteCa3(U6+0.5Zr1.5)[Fe3+O4]3Iso. m3m(4/m32/m) : Ia3d
4.CC.32MonteneveiteCa3Sb5+2(Fe3+2Fe2+)O12Iso. m3m(4/m32/m) : Ia3d
4.CC.32DzhuluiteCa3(Sb5+Sn4+)[Fe3+O4]3Iso. m3m(4/m32/m) : Ia3d
4.CC.35TausoniteSrTiO3Iso. 43m
4.CC.35Panguite(Ti,Al,Sc,Mg,Zr,Ca)1.8O3Orth. mmm(2/m2/m2/m) : Pbca
4.CC.35Isolueshite(Na,La)NbO3Iso. m3m(4/m32/m) : Pm3m
4.CC.35MacedonitePbTiO3Tet. 4/mmm(4/m2/m2/m) : P4/nmm
4.CC.37PauloabibiteNaNbO3Trig. 3 : R3
4.CC.40LandauiteNaMnZn2(Ti,Fe)6Ti12O38Trig. 3 : R3
4.CC.40Mathiasite(Mg,Cr,Fe,Ca,K)2(Ti,Zr,Cr,Fe)5O12Trig. 3 : R3
4.CC.40SenaitePb(Mn,Y,U)(Fe,Zn)2(Ti,Fe,Cr,V)18(O,OH)38Trig. 3 : R3
4.CC.40Gramaccioliite-(Y)(Pb,Sr)(Y,Mn)Fe3+2(Ti,Fe3+)18O38Trig. 3 : R3
4.CC.40Lindsleyite(Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38Trig.
4.CC.40CrichtoniteSr(Mn,Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH)38Trig. 3 : R3
4.CC.40Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38Trig. 3 : R3
4.CC.40Cleusonite(Pb,Sr)(U4+,U6+)(Fe2+,Zn)2(Ti,Fe2+,Fe3+)18(O,OH)38Trig. 3 : R3
4.CC.40Davidite-(Ce)Ce(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38Trig. 3 : R3
4.CC.40Davidite-(La)La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38Trig. 3 : R3
4.CC.40'Davidite-(Y)'(La,Ce,Na,Ca,Pb)(Y,Fe2+,◻)(Fe2+,Mn2+)2(Ti,Fe3+,Nb,Zr)18O38 (hypothetical)Trig.
4.CC.40'Uhligite'Ca3(Ti,Al,Zr)9O20 ?Iso.
4.CC.40Dessauite-(Y)(Sr,Pb)(Y,U)(Ti,Fe3+)20O38Trig. 3 : R3
4.CC.45DiaoyudaoiteNaAl11O17Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.45YimengiteK(Cr,Ti,Fe,Mg)12O19Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.45NežilovitePbZn2Mn4+2Fe3+8O19Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.45HawthorneiteBaMgTi3Cr4Fe2+2Fe3+2O19Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.45Mizraite-(Ce)Ce(Al11Mg)O19Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.45HaggertyiteBaFe2+4Fe3+2Ti5MgO19Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.45LindqvistitePb2Mn2+Fe16O27Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.45HiboniteCaAl12O19Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.45Kangite(Sc,Ti,Al,Zr,Mg,Ca,◻)2O3 Iso. m3(2/m3)
4.CC.45ChihuahuaiteFeAl12O19Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.45BarioferriteBaFe3+12O19Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.45PlumboferritePb[Fe3+10.67Mn2+0.33Pb]O18.33Trig. 32 : P312
4.CC.45BatiferriteBaTi2Fe3+8Fe2+2O19Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.45MagnetoplumbitePbFe3+12O19Hex. 6/mmm(6/m2/m2/m) : P63/mmc
4.CC.50JeppeiteK2Ti6O13Mon. 2/m : B2/m
4.CC.55ZenzénitePb3Fe3+4Mn4+3O15Hex. 6/mmm(6/m2/m2/m) : P63/mcm
4.CC.60'Mengxianminite (of Huang et al.)'(Ca,Na)3(Fe,Mn)2Mg2(Sn,Zn)5Al8O29

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.

Internet Links for LopariteHide

References for LopariteHide

Reference List:

Localities for LopariteHide

Showing 110 localities.

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.
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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.
Angola
 
  • Huambo Province
    • Londuimbali
Gonçalves +1 other reference
Brazil
 
  • Goiás
    • Catalão
Guarino (2010)
  • Minas Gerais
Guarino et al. (2021) +1 other reference
Haggerty et al. (1983)
Canada
 
  • Newfoundland and Labrador
    • Labrador
      • Seal Lake alkaline complex (Letitia Lake)
GSC locality database +1 other reference
  • Ontario
    • Thunder Bay District
      • Killala Lake Area
Liferovich et al. (2006)
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
Chakhmouradian et al. (2007)
    • Nord-du-Québec
      • Jamésie
Nadeau et al. (2016)
Cape Verde
 
  • Barlavento Islands
Figueiredo et al. (1989) +9 other references
China
 
  • Hubei
    • Shiyan
      • Zhuxi Co.
Yan et al. (2022)
  • Inner Mongolia
    • Baotou City
      • Bayan Obo mining district
        • Bayan Obo deposit
Zhang Peishan et al. (1996)
  • Liaoning
    • Dandong
      • Kuandian County
- (1978) +2 other references
Ma et al. (2023)
  • Qinghai
    • Haixi Mongol and Tibetan Autonomous Prefecture
      • Dulan County
Bao et al. (2026)
Czech Republic
 
  • Moravian-Silesian Region
    • Frýdek-Místek District
      • Brušperk
Matýsek et al. (2025)
      • Bruzovice
Matýsek et al. (2025)
Egypt
 
  • Red Sea Governorate
Saleh (2007)
Greenland
 
  • Sermersooq
    • Kangerlussuaq Fjord
Distribution and mineralogy of rare earth element–Zr–Nb–Ta mineralisation within pegmatite sheets at Citadellet et al. (Trans. Inst. Min. Metall. B)
Petersen et al. (1985) +1 other reference
Norway
 
  • Telemark
    • Nome
      • Søve Mines
Dahlgren (2005)
    • Porsgrunn
      • Bjørkedalen
Segalstad et al. (1978)
  • Vestfold
    • Larvik Commune
      • Hedrum
        • Lågendalen
Sæbø (1965) +2 other references
Berge (n.d.)
        • Lysebo
Berge (n.d.)
Berge (n.d.)
Larsen et al. (2010)
      • Kvelde
Berge (n.d.)
Paraguay
 
  • Amambay Department
Haggerty et al. (1983)
Haggerty et al. (1983)
Romania
 
  • Harghita County
Hirtopanu (2006)
Szakáll et al. (2010)
    • Joseni
Hirtopanu et al. (2013)
  • Hunedoara County
HÎRTOPANU et al. (2014)
Russia
 
  • Buryatia
    • Mama River Basin
      • Maigunda River
Pekov (1998) +3 other references
Merlino S. et al. (1990) +1 other reference
  • Krasnoyarsk Krai
    • Enisei Range (Yenisei Ridge; Enisei Ridge)
Seltmann et al. (2010)
    • Maimecha and Kotui Rivers Basin
      • Odikhincha massif
Zaitsev et al. (2022)
  • Murmansk Oblast
Chakhmouradian et al. (1999)
[var: Nioboloparite] Mitchell et al. (1996) +1 other reference
Konopleva et al. (2008)
      • Astrophyllite Stream
Arzamastsev et al. (2008)
Barkov et al. (2006)
Azarova et al. (2009)
[var: Nioboloparite] ...
    • Kihlman Mountain
[var: Nioboloparite] Pavel M. Kartashov (n.d.)
PEKOV et al. (2013)
Yakovenchuk et al. (2003)
    • Kovdorsky District
Pekov (1998)
      • Marchenko Peak
Arzamastsev et al. (2008)
[var: Nioboloparite] ... +1 other reference
Mokrushina et al. (2023)
    • Lovozersky District
Pekov (2003) +1 other reference
Pavel M. Kartashov (n.d.) +1 other reference
Pavel M. Kartashov (n.d.)
Pekov (1998)
      • Engporr Mountain
Mikhail Uchitel' data
[World of Stones 95:5-6 +1 other reference
Rastsvetaeva +3 other references
Kotrly et al. (1996)
[World of Stones 95:5-6 +1 other reference
Mikhailova et al. (2025)
      • Seidozero Lake
Semenov E.I. (1972)
Semenov E.I. (1972)
Selivanova et al. (2024)
      • Suoluai River Valley
Selivanova et al. (2024) +1 other reference
      • Suoluaiv Mountain
Mikhail Uchitel' data
      • Vavnbed Mountain
Pekov (1998)
Ruslan Liferovich's Collection +3 other references
Mitchell et al. (1998) +1 other reference
Arzamastsev et al. (2008)
Maggie Wilson
Konopleva et al. (2008)
Mikhailova et al. (2007)
Arzamastsev et al. (2008)
Pavel's photo
[World of Stones 12:49]
Doroshkevich et al. (2022)
  • Zabaykalsky Krai
    • Baleysky District
Pavel M. Kartashov (n.d.)
Slovakia
 
  • Košice Region
    • Spišská Nová Ves District
      • Hnilec
Koděra et al. (1986)
South Africa
 
  • North West
    • Bojanala Platinum District Municipality
      • Moses Kotane Local Municipality
[var: Nioboloparite] Mitchell et al. (2004)
Spain
 
  • Canary Islands
    • Las Palmas Province
Dill et al. (2023)
    • Santa Cruz de Tenerife Province
Borley et al. (1971) +9 other references
Dill et al. (2023)
        • Arico
Dill et al. (2023)
        • Arona
Dill et al. (2023)
        • Candelaria
          • Barranco Hondo
Dill et al. (2023)
        • Granadilla de Abona
Dill et al. (2023)
Dill et al. (2023)
Dill et al. (2023)
Dill et al. (2023)
Dill et al. (2023)
Dill et al. (2023)
Dill et al. (2023)
Dill et al. (2023)
Ferguson (1978)
        • Santa Cruz de Tenerife
Dill et al. (2023)
        • Santiago del Teide
Dill et al. (2023)
USA
 
  • Arkansas
    • Hot Spring County
Rocks and Minerals (1999)
  • Maine
    • Aroostook County
      • T15 R6 WELS
        • Pennington Mountain
Wang et al. (2023) +2 other references
  • Montana
    • Hill County
      • Bearpaw Mountains
Mitchell et al. (2000)
    • Meagher County
Mitchell (2000) +1 other reference
Zimbabwe
 
  • Matabeleland South
    • Beitbridge District
Kopylova et al. (1997) +2 other references
 
and/or  
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