Loparite
A valid IMA mineral species - grandfathered
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About Loparite
Formula:
(Na,REE)2Ti2O6
Colour:
Black to grayish black
Lustre:
Metallic, Sub-Metallic
Hardness:
5½
Specific Gravity:
4.60 - 4.89
Crystal System:
Isometric
Member of:
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 Identifiers
Mindat ID:
2432
Long-form identifier:
mindat:1:1:2432:3
Similar Names
| Liparite | A synonym of 'Rhyolite' |
| Liparite (of Casoria) | A synonym of Chrysocolla |
| Liparite (of Glocker) | A synonym of Fluorite |
| Loparita | A synonym of -unidentified- |
IMA Classification of Loparite
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 Loparite
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 : 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
4 : SIMPLE OXIDES
3 : A2X3
18.2.11
18 : Niobates and Tantalates
2 : Niobates and tantalates containing rare earths but not U
18 : Niobates and Tantalates
2 : Niobates and tantalates containing rare earths but not U
Mineral Symbols
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.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Lop | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Lop | The 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 Loparite
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}
{100}
Fracture:
Irregular/Uneven
Density:
4.60 - 4.89 g/cm3 (Measured) 4.85(10) g/cm3 (Calculated)
Optical Data of Loparite
Type:
Isotropic
RI values:
n = 2.26 - 2.38
Surface Relief:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
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:
| Wavelength | R1 (%) |
|---|---|
| 400nm | 18.8% |
| 420nm | 18.2% |
| 440nm | 17.8% |
| 460nm | 17.3% |
| 480nm | 17.0% |
| 500nm | 16.8% |
| 520nm | 16.6% |
| 540nm | 16.4% |
| 560nm | 16.3% |
| 580nm | 16.1% |
| 600nm | 16.1% |
| 620nm | 16.0% |
| 640nm | 15.9% |
| 660nm | 15.9% |
| 680nm | 15.9% |
| 700nm | 15.8% |
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
anomalously anisotropic
Chemistry of Loparite
Mindat Formula:
(Na,REE)2Ti2O6
Element Weights:
Elements listed:
Crystallography of Loparite
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 Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0005641 | Loparite | Mitchell R H, Burns P C, Chakhmouradian A R (2000) The crystal structures of loparite-(Ce) The Canadian Mineralogist 38 145-152 | ![]() | 2000 | Bearpaw Mountains, Montana, USA | 0 | 293 |
| 0005640 | Loparite | Mitchell R H, Burns P C, Chakhmouradian A R (2000) The crystal structures of loparite-(Ce) The Canadian Mineralogist 38 145-152 | ![]() | 2000 | Lovozero complex, Russia | 0 | 293 |
| 0005639 | Loparite | Mitchell R H, Burns P C, Chakhmouradian A R (2000) The crystal structures of loparite-(Ce) The Canadian Mineralogist 38 145-152 | ![]() | 2000 | Khibina complex, Russia | 0 | 293 |
| 0017915 | Loparite | Gaertner H (1930) Die Kristallstrukturen von Loparit und Pyrochlor _cod_database_code 1011000 Neues Jahrbuch fur Mineralogie, Geologie und Palaeontologie. Beilage 61 1-30 | 1930 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 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 Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Loparite
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 Loparite
Other Language Names for Loparite
Varieties of Loparite
| Nioboloparite | A variety of loparite containing niobium. |
Relationship of Loparite to other Species
Member of:
Other Members of Perovskite Subgroup:
| Barioperovskite | BaTiO3 | Orth. mm2 : Amm2 |
| Goldschmidtite | KNbO3 | Iso. m3m(4/m32/m) : Pm3m |
| Isolueshite | (Na,La)NbO3 | Iso. m3m(4/m32/m) : Pm3m |
| Lakargiite | Ca(Zr,Sn,Ti)O3 | Orth. mmm(2/m2/m2/m) : Pnma |
| Lueshite | NaNbO3 | Orth. mmm(2/m2/m2/m) |
| Macedonite | PbTiO3 | Tet. 4/mmm(4/m2/m2/m) : P4/nmm |
| Megawite | CaSnO3 | Orth. mmm(2/m2/m2/m) : Pban |
| Perovskite | CaTiO3 | Orth. mmm(2/m2/m2/m) : Pnma |
| Tausonite | SrTiO3 | Iso. 43m |
Common Associates
Associations Based on Photo Data:
| 13 photos of Loparite associated with Aegirine | NaFe3+Si2O6 |
| 6 photos of Loparite associated with Albite | Na(AlSi3O8) |
| 6 photos of Loparite associated with Eudialyte | Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2 |
| 4 photos of Loparite associated with Titanite | CaTiO(SiO4) |
| 2 photos of Loparite associated with Kyanoxalite | Na7(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 Lorenzenite | Na2Ti2(Si2O6)O3 |
| 1 photo of Loparite associated with Perovskite | CaTiO3 |
| 1 photo of Loparite associated with Anzaite-(Ce) | Ce3+ 4Fe2+Ti6O18 (OH)2 |
| 1 photo of Loparite associated with Paralomonosovite | Na6◻4Ti4(Si2O7)2[PO3OH][PO2(OH)2]O2(OF) |
Related Minerals - Strunz-mindat Grouping
| 4.CC. | Xuite | Ca3Fe3+2[(AlO3(OH)]3 |
| 4.CC. | Yttriaite-(Y) | Y2O3 |
| 4.CC. | Allendeite | Sc4Zr3O12 |
| 4.CC. | Chlorkyuygenite | Ca12Al14O32[(H2O)4Cl2] |
| 4.CC. | Oboniobite | Mg4Nb2O9 |
| 4.CC. | Botuobinskite | SrFe2+Mg2(Cr3+6Ti4+12)[O36(OH)2] |
| 4.CC. | Mirnyite | SrZr4+Mg2(Cr3+6Ti4+12)O38 |
| 4.CC. | Haitaite-(La) | LaU4+Fe3+2(Ti13Fe2+4Fe3+)O38 |
| 4.CC. | Shagamite | KFe11O17 |
| 4.CC. | Bitikleite | Ca3(Sb5+Sn4+)[AlO4]3 |
| 4.CC. | Anzaite-(Ce) | Ce3+ 4Fe2+Ti6O18 (OH)2 |
| 4.CC. | Heamanite-(Ce) | (K0.5Ce0.5)TiO3 |
| 4.CC. | Priscillagrewite-(Y) | (Ca2Y)Zr2(AlO4)3 |
| 4.CC. | Strandite | Pb3Mn3+4Mn4+3O15 |
| 4.CC. | Saranovskite | SrCaFe2+2(Cr4Ti2)Ti12O38 |
| 4.CC.05 | Chrombismite | Bi3+16Cr6+O27 |
| 4.CC.10 | Freudenbergite | Na2(Ti,Fe)8O16 |
| 4.CC.10 | Fluormayenite | Ca12Al14O32F2 |
| 4.CC.10 | Fluorkyuygenite | Ca12Al14O32[(H2O)4F2] |
| 4.CC.15 | Grossite | CaAl4O7 |
| 4.CC.17 | Goldschmidtite | KNbO3 |
| 4.CC.20 | 'Unnamed (HBU UK-4)' | NaFe2+Zn2(Ti,Fe3+,Nb)6Ti12O38 |
| 4.CC.20 | Chlormayenite | Ca12Al14O32[◻4Cl2] |
| 4.CC.20 | Paseroite | PbMn2+(Mn2+,Fe3+)2(V5+,Ti,◻)18O38 |
| 4.CC.20 | Mianningite | (◻,Pb,Ce,Na)(U4+,Mn,U6+)Fe3+2 (Ti,Fe3+)18O38 |
| 4.CC.20 | 'UM1987-03-O:FePbTiU' | ~(U,Pb)(Ti,Fe3+,Fe2+,Mn)21O38 |
| 4.CC.22 | Gorerite | CaAlFe3+11O19 |
| 4.CC.22 | Kahlenbergite | KAl11O17 |
| 4.CC.25 | Hopmannite | Ba2(Ti5Fe)O13 |
| 4.CC.25 | Nixonite | Na2Ti6O13 |
| 4.CC.25 | Yafsoanite | Ca3Te6+2(ZnO4)3 |
| 4.CC.30 | Latrappite | Ca2NbFe3+O6 |
| 4.CC.30 | Natroniobite | NaNbO3 |
| 4.CC.30 | Perovskite | CaTiO3 |
| 4.CC.30 | Lueshite | NaNbO3 |
| 4.CC.30 | Bariolakargiite | BaZrO3 |
| 4.CC.30 | Barioperovskite | BaTiO3 |
| 4.CC.30 | Megawite | CaSnO3 |
| 4.CC.30 | Lakargiite | Ca(Zr,Sn,Ti)O3 |
| 4.CC.32 | Usturite | Ca3(Sb5+Zr)[Fe3+O4]3 |
| 4.CC.32 | Elbrusite | Ca3(U6+0.5Zr1.5)[Fe3+O4]3 |
| 4.CC.32 | Monteneveite | Ca3Sb5+2(Fe3+2Fe2+)O12 |
| 4.CC.32 | Dzhuluite | Ca3(Sb5+Sn4+)[Fe3+O4]3 |
| 4.CC.35 | Tausonite | SrTiO3 |
| 4.CC.35 | Panguite | (Ti,Al,Sc,Mg,Zr,Ca)1.8O3 |
| 4.CC.35 | Isolueshite | (Na,La)NbO3 |
| 4.CC.35 | Macedonite | PbTiO3 |
| 4.CC.37 | Pauloabibite | NaNbO3 |
| 4.CC.40 | Landauite | NaMnZn2(Ti,Fe)6Ti12O38 |
| 4.CC.40 | Mathiasite | (Mg,Cr,Fe,Ca,K)2(Ti,Zr,Cr,Fe)5O12 |
| 4.CC.40 | Senaite | Pb(Mn,Y,U)(Fe,Zn)2(Ti,Fe,Cr,V)18(O,OH)38 |
| 4.CC.40 | Gramaccioliite-(Y) | (Pb,Sr)(Y,Mn)Fe3+2(Ti,Fe3+)18O38 |
| 4.CC.40 | Lindsleyite | (Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38 |
| 4.CC.40 | Crichtonite | Sr(Mn,Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH)38 |
| 4.CC.40 | Loveringite | (Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38 |
| 4.CC.40 | Cleusonite | (Pb,Sr)(U4+,U6+)(Fe2+,Zn)2(Ti,Fe2+,Fe3+)18(O,OH)38 |
| 4.CC.40 | Davidite-(Ce) | Ce(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38 |
| 4.CC.40 | Davidite-(La) | La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38 |
| 4.CC.40 | 'Davidite-(Y)' | (La,Ce,Na,Ca,Pb)(Y,Fe2+,◻)(Fe2+,Mn2+)2(Ti,Fe3+,Nb,Zr)18O38 (hypothetical) |
| 4.CC.40 | 'Uhligite' | Ca3(Ti,Al,Zr)9O20 ? |
| 4.CC.40 | Dessauite-(Y) | (Sr,Pb)(Y,U)(Ti,Fe3+)20O38 |
| 4.CC.45 | Diaoyudaoite | NaAl11O17 |
| 4.CC.45 | Yimengite | K(Cr,Ti,Fe,Mg)12O19 |
| 4.CC.45 | Nežilovite | PbZn2Mn4+2Fe3+8O19 |
| 4.CC.45 | Hawthorneite | BaMgTi3Cr4Fe2+2Fe3+2O19 |
| 4.CC.45 | Mizraite-(Ce) | Ce(Al11Mg)O19 |
| 4.CC.45 | Haggertyite | BaFe2+4Fe3+2Ti5MgO19 |
| 4.CC.45 | Lindqvistite | Pb2Mn2+Fe16O27 |
| 4.CC.45 | Hibonite | CaAl12O19 |
| 4.CC.45 | Kangite | (Sc,Ti,Al,Zr,Mg,Ca,◻)2O3 |
| 4.CC.45 | Chihuahuaite | FeAl12O19 |
| 4.CC.45 | Barioferrite | BaFe3+12O19 |
| 4.CC.45 | Plumboferrite | Pb[Fe3+10.67Mn2+0.33Pb]O18.33 |
| 4.CC.45 | Batiferrite | BaTi2Fe3+8Fe2+2O19 |
| 4.CC.45 | Magnetoplumbite | PbFe3+12O19 |
| 4.CC.50 | Jeppeite | K2Ti6O13 |
| 4.CC.55 | Zenzénite | Pb3Fe3+4Mn4+3O15 |
| 4.CC.60 | 'Mengxianminite (of Huang et al.)' | (Ca,Na)3(Fe,Mn)2Mg2(Sn,Zn)5Al8O29 |
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 Loparite
mindat.org URL:
https://www.mindat.org/min-2432.html
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References for Loparite
Reference List:
Sitnin, A., Leonova, T.N. (1961) Loparite — new mineral. Doklady Akademii Nauk SSSR: 140: 1407-1410.
Haggerty, Stephen E.; Mariano, Anthony N. (1983) Strontian-loparite and strontio-chevkinite: Two new minerals in rheomorphic fenites from the Paraná Basin carbonatites, South America. Contributions to Mineralogy and Petrology, 84 (4). p.365-381. doi:10.1007/bf01160288
Nickel, Ernest H., Mandarino, Joseph A. (1987) Procedures involving the IMA Commission on New Minerals and Mineral Names and guidelines on mineral nomenclature. American Mineralogist, 72 (9-10) 1031-1042
Mitchell, Roger H., Chakhmouradian, Anton R. (1998) Th-rich loparite from the Khibina alkaline complex, Kola Peninsula: isomorphism and paragenesis. Mineralogical Magazine, 62 (3) 341-353 doi:10.1180/002646198547738
Chakhmouradian, A. R., Mitchell, R. H., Pankov, A. V., Chukanov, N. V. (1999) Loparite and ‘metaloparite’ from the Burpala alkaline complex, Baikal Alkaline
Province (Russia) Mineralogical Magazine, 63 (4) 519-534 doi:10.1180/002646199548691
Mitchell, R. H., Burns, P. C., Chakhmouradian, A. R. (2000) The crystal structures of loparite-(Ce) The Canadian Mineralogist, 38 (1) 145-152 doi:10.2113/gscanmin.38.1.145
Chakhmouradian, Anton R., Halden, Norman M., Mitchell, Roger H., Horváth, László (2007) Rb-Cs-rich rasvumite and sector-zoned "loparite-(Ce)" from Mont Saint-Hilaire (Quebec, Canada) and their petrologic significance. European Journal of Mineralogy, 19 (4) 533-546 doi:10.1127/0935-1221/2007/0019-1739
Popova, E. A., Zalessky, V. G., Yakovenchuk, V. N., Krivovichev, S. V., Lushnikov, S. G. (2014) Loparite-(Ce), a natural ferroelectric with the perovskite-type structure. Applied Physics Letters, 105 (8). 82905pp. doi:10.1063/1.4894171
Popova, E. A., Yakovenchuk, V. N., Lushnikov, S. G., Krivovichev, S. V. (2015) Structural phase transitions in loparite-(Ce): evidences from Raman light scattering. Journal of Raman Spectroscopy, 46 (1). 161-166 doi:10.1002/jrs.4587
Feng, Dawei, Shivaramaiah, Radha, Navrotsky, Alexandra (2016) Rare-earth perovskites along the CaTiO3-Na0.5La0.5TiO3 join: Phase transitions, formation enthalpies, and implications for loparite minerals. American Mineralogist, 101 (9) 2051-2056 doi:10.2138/am-2016-5740
Popova, Elena A., Lushnikov, Sergey G., Yakovenchuk, Victor N., Krivovichev, Sergey V. (2017) The crystal structure of loparite: a new acentric variety. Mineralogy and Petrology, 111 (6) 827-832 doi:10.1007/s00710-017-0498-y
Mitchell, Roger H., Welch, Mark D., Chakhmouradian, Anton R. (2017) Nomenclature of the perovskite supergroup: A hierarchical system of classification based on crystal structure and composition. Mineralogical Magazine, 81 (3) 411-461 doi:10.1180/minmag.2016.080.156
Kogarko, L. N. (2022) Peculiarities of the Formation of Loparite Ores: The Lovozero Rare Metal Deposit, East Fennoscandia. Doklady Earth Sciences, 505 (2) 524-526 doi:10.1134/s1028334x22080098
Mikhailova, Julia A., Pakhomovsky, Yakov A., Selivanova, Ekaterina A., Kompanchenko, Alena A. (2023) Polymineralic Inclusions in Loparite-(Ce) from the Lovozero Alkaline Massif (Kola Peninsula, Russia): Hydrothermal Association in Miniature. Minerals, 13 (6) 715 doi:10.3390/min13060715
Bosi, F.; Hatert, F.; Pasero, M.; Mills, S. J. (2024) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 80. European Journal of Mineralogy, 36 (4). 599-604 doi:10.5194/ejm-36-599-2024
Daneu, Nina; Padrón-Navarta, José Alberto; Šala, Martin; Mervič, Kristina; Habler, Gerlinde; Dražič, Goran; Borštnar, Petruša; Rečnik, Aleksander; Abart, Rainer (2026) Deciphering crystal growth in a sector-zoned interpenetration twin of loparite from Mt Khibiny (Kola Peninsula, Russia) through atomic-scale characterisation of growth sectors and twin boundaries. European Journal of Mineralogy, 38 (1). 53-73 doi:10.5194/ejm-38-53-2026
Localities for Loparite
Showing 110 localities.
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.
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N'orkpakhk Mt, Murmansk Oblast, Russia