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Aeschynite-(Ce)

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Formula:
(Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6
Colour:
Black, brown, light brown to yellow
Lustre:
Resinous, Waxy, Sub-Metallic
Hardness:
5 - 6
Specific Gravity:
5.19
Crystal System:
Orthorhombic
Name:
From the Greek αισχύνη ("aeschyne") for "shame", alluding to the fact that early chemists had difficulty with separations of titanium from zirconium in some samples, and the dominant lanthanide element in the composition.

First found by J.N. Menge in 1825 at the Gadolinite Pit (Pits nr. 75-76), Ilmen, Ural, Russia. He first thought it was gadolinite, but later the material was analyzed by Victor Hartwall at the laboratory of the Swedish Chemist Jöns Jacob Berzelius and recognized as a new mineral. Berzelius gave it first the name "zirconia titanate", later aeschynite (Berzelius 1830). Renamed "aeschynite-(Ce)" after applying Levinson’s nomenclature (1966).
The cerium analogue of aeschynite-(Y) and the titanium analogue of nioboaeschynite-(Ce). Commonly metamict.


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Classification of Aeschynite-(Ce)Hide

Approved, 'Grandfathered' (first described prior to 1959)
Notes:
Renamed by the IMA
Approval History:
Renamed by IMA 1987 (special procedure) as aeschynite-(Ce).
4.DF.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
F : With large (+- medium-sized) cations; dimers and trimers of edgesharing octahedra
8.3.6.1

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
3 : AB2O6
18.2.13

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

Physical Properties of Aeschynite-(Ce)Hide

Resinous, Waxy, Sub-Metallic
Transparency:
Translucent
Comment:
dull when altered
Colour:
Black, brown, light brown to yellow
Comment:
reddish brown to light brown in transmitted light.
Streak:
Nearly black to brown
Hardness:
5 - 6 on Mohs scale
Tenacity:
Brittle
Cleavage:
Imperfect/Fair
on {100}, interrupted
Parting:
parallel to {010} when nonmetamict
Fracture:
Conchoidal
Density:
5.19 g/cm3 (Measured)    5.617 g/cm3 (Calculated)

Chemical Properties of Aeschynite-(Ce)Hide

Formula:
(Ce,Ca,Fe,Th)(Ti,Nb)2(O,OH)6
Common Impurities:
REE,Sn

Crystallography of Aeschynite-(Ce)Hide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pmna
Cell Parameters:
a = 7.538 Å, b = 10.958 Å, c = 5.396 Å
Ratio:
a:b:c = 0.688 : 1 : 0.492
Unit Cell V:
445.72 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Crystals are prismatic, parallel to [001], also tabular on {010} and striated on {010} parallel to [100]

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.037 (25)
2.698 (30)
2.975 (100)
3.024 (80)
3.106 (35)
4.431 (25)
5.48 (25)
(
Comments:
Recorded on synthetic CeTiNbO6.

Type Occurrence of Aeschynite-(Ce)Hide

Other Language Names for Aeschynite-(Ce)Hide

Simplified Chinese:铈易解石

Varieties of Aeschynite-(Ce)Hide

AlumolyndochiteAn Aluminium-rich variety of Lyndochite [Aeschynite-(Ce)].
CalciolyndochiteA Ca-rich variety of Lyndochite [Aeschynite-(Ce)].

Relationship of Aeschynite-(Ce) to other SpeciesHide

Other Members of this group:
Aeschynite-(Nd)(Nd,Ln,Ca)(Ti,Nb)2(O,OH)6Orth. mmm (2/m 2/m 2/m)
Aeschynite-(Y)(Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6Orth. mmm (2/m 2/m 2/m) : Pmna
Nioboaeschynite-(Ce)(Ce,Ca)(Nb,Ti)2(O,OH)6Orth.
Nioboaeschynite-(Nd)(Nd,Ce,Ca,Th)(Nb,Ti,Fe,Ta)2(O,OH)6Orth.
Nioboaeschynite-(Y)(Y,REE,Ca,Th,Fe)(Nb,Ti,Ta)2(O,OH)6Orth. mmm (2/m 2/m 2/m) : Pban
RynersoniteCaTa2O6Orth. mmm (2/m 2/m 2/m)
Tantalaeschynite-(Y)Y(Ta,Ti,Nb)2O6Orth. mmm (2/m 2/m 2/m)
Vigezzite(Ca,Ce)(Nb,Ta,Ti)2O6Orth.
Forms a series with:

Common AssociatesHide

Allanite Group{A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
Columbite-(Fe)-Columbite-(Mn) Series
Feldspar GroupA group of silicate minerals.
Samarskite-(Y)(Y,Fe3+,Fe2+,U,Th,Ca)2(Nb,Ta)2O8
TitaniteCaTi(SiO4)O
ZirconZr(SiO4)

Related Minerals - Nickel-Strunz GroupingHide

4.DF.05Aeschynite-(Nd)(Nd,Ln,Ca)(Ti,Nb)2(O,OH)6Orth. mmm (2/m 2/m 2/m)
4.DF.05Aeschynite-(Y)(Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6Orth. mmm (2/m 2/m 2/m) : Pmna
4.DF.05Nioboaeschynite-(Ce)(Ce,Ca)(Nb,Ti)2(O,OH)6Orth.
4.DF.05Nioboaeschynite-(Nd)(Nd,Ce,Ca,Th)(Nb,Ti,Fe,Ta)2(O,OH)6Orth.
4.DF.05Nioboaeschynite-(Y)(Y,REE,Ca,Th,Fe)(Nb,Ti,Ta)2(O,OH)6Orth. mmm (2/m 2/m 2/m) : Pban
4.DF.05RynersoniteCaTa2O6Orth. mmm (2/m 2/m 2/m)
4.DF.05Tantalaeschynite-(Y)Y(Ta,Ti,Nb)2O6Orth. mmm (2/m 2/m 2/m)
4.DF.05Vigezzite(Ca,Ce)(Nb,Ta,Ti)2O6Orth.
4.DF.10ChangbaiitePbNb2O6Trig.
4.DF.15Murataite-(Y)(Y,Na)6Zn(Zn,Fe3+)4(Ti,Nb,Na)12O29(O,F,OH)10F4 Iso. m3m (4/m 3 2/m) : Fm3m

Related Minerals - Dana Grouping (8th Ed.)Hide

8.3.6.2Nioboaeschynite-(Ce)(Ce,Ca)(Nb,Ti)2(O,OH)6Orth.
8.3.6.3Aeschynite-(Y)(Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6Orth. mmm (2/m 2/m 2/m) : Pmna
8.3.6.4Tantalaeschynite-(Y)Y(Ta,Ti,Nb)2O6Orth. mmm (2/m 2/m 2/m)
8.3.6.5Aeschynite-(Nd)(Nd,Ln,Ca)(Ti,Nb)2(O,OH)6Orth. mmm (2/m 2/m 2/m)
8.3.6.7Nioboaeschynite-(Y)(Y,REE,Ca,Th,Fe)(Nb,Ti,Ta)2(O,OH)6Orth. mmm (2/m 2/m 2/m) : Pban

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

18.2.1Fergusonite-(Y)YNbO4Tet. 4/m : I41/a
18.2.2Fergusonite-(Y)-βYNbO4Mon. 2/m
18.2.3Fergusonite-(Ce)(Ce,La,Nd)NbO4
18.2.4Fergusonite-(Ce)-β(Ce,La,Nd)NbO4
18.2.5Fergusonite-(Nd)(Nd,Ce)(Nb,Ti)O4
18.2.6Fergusonite-(Nd)-β(Nd,Ce)NbO4
18.2.7Formanite-(Y)YTaO4Tet. 4/m : I41/a
18.2.8Pyrochlore GroupA2Nb2(O,OH)6Z
18.2.9Ceriopyrochlore (of Hogarth 1977)A2Nb2(O,OH)6Z
18.2.10Strontiopyrochlore (of Hogarth 1977)A2Nb2(O,OH)6Z
18.2.11Loparite-(Ce)(Na,REE)Ti2O6
18.2.12Fersmite(Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6Orth. mmm (2/m 2/m 2/m) : Pbcn
18.2.14Aeschynite-(Nd)(Nd,Ln,Ca)(Ti,Nb)2(O,OH)6Orth. mmm (2/m 2/m 2/m)
18.2.15Aeschynite-(Y)(Y,Ln,Ca,Th)(Ti,Nb)2(O,OH)6Orth. mmm (2/m 2/m 2/m) : Pmna
18.2.16Nioboaeschynite-(Ce)(Ce,Ca)(Nb,Ti)2(O,OH)6Orth.
18.2.17Nioboaeschynite-(Nd)(Nd,Ce,Ca,Th)(Nb,Ti,Fe,Ta)2(O,OH)6Orth.
18.2.18Tantalaeschynite-(Y)Y(Ta,Ti,Nb)2O6Orth. mmm (2/m 2/m 2/m)
18.2.19Vigezzite(Ca,Ce)(Nb,Ta,Ti)2O6Orth.
18.2.20Murataite-(Y)(Y,Na)6Zn(Zn,Fe3+)4(Ti,Nb,Na)12O29(O,F,OH)10F4 Iso. m3m (4/m 3 2/m) : Fm3m

Other InformationHide

Notes:
radioactive, magnetic
Health Risks:
Contains thorium - always wash hands after handling. Avoid inhaling dust when handling or breaking. Never lick or ingest. Avoid prolonged exposure in proximity of the body. Store away from inhabited areas.

References for Aeschynite-(Ce)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Berzelius, J. (1830) Mineralogie: Aeschynit. Jahres-Bericht über die Fortschritte der Physischen Wissenschaften: 9: 182-209
Palache, C., Berman, H., Frondel, C. (1944) Dana's system of mineralogy, 7th ed., Vol. 1, 793-797.
Vlasov, K.A., Ed. (1966) Mineralogy of rare elements, Vol. 2, 489-496 .
Aleksandrov, V. B. (1962) The crystal structure of aeschynite. Doklady Akademii Nauk SSSR: 142: 181-184
Fleischer, M. (1966) Rare earths in the aeschynite-priorite series. The status of lyndochite. Mineralogical Magazine: 35: 801-809.
Ewing, R.C. (1976) A numerical approach toward the classification of complex, orthorhombic, rare-earth, AB2O6-type Nb-Ta-Ti oxides. The Canadian Mineralogist: 14: 111-119.
Anthony, J. W. et al. (1997) Handbook of Mineralogy, Vol. 3, 3.
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow [p. 19-20]

Internet Links for Aeschynite-(Ce)Hide

Localities for Aeschynite-(Ce)Hide

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.
Austria
 
  • Salzburg
    • Hohe Tauern
      • Habach valley
        • Nasenkopf
J. W. Anthony et al.: Handbook of Mineralogy, Vol. III (1997)
      • Rauris valley
        • Hüttwinkl valley
R. O. Meyer collection
J. W. Anthony et al.: Handbook of Mineralogy, Vol. III (1997)
Canada
 
  • Newfoundland and Labrador
    • Labrador
GSC locality database
  • Ontario
    • Renfrew Co.
      • Lyndoch Township
ontariominerals.com
China
 
  • Hunan Province
    • Yongzhou Prefecture
      • Jianghua Co.
        • Guposhan Sn-polymetallic ore field
Zhang Peishan, Yang Zhuming, Tao Kejie, and Yang Xueming (1996): "Mineralogy and Geology of Rare Earths in China", Science Press (Beijing), 226 pp.
  • Inner Mongolia Autonomous Region
    • Baotou League (Baotou Prefecture)
      • Bayan Obo Mining District
        • Bayan Obo
Zhuming Yang, Rengui Song, Kejie Tao, and Peishan Zhang (2003): Journal of the Chinese Rare Earth Society 21(6), 716-720
Czech Republic
 
  • Moravia (Mähren; Maehren)
    • Olomouc Region
      • Šumperk (Mährisch Schönberg)
        • Maršíkov (Marchendorf)
Chládek Š., Zimák J.(2016): Asociace Nb-Ta-(Ti-REE) oxidických minerálů v pegmatitu Maršíkov - Lysá hora v Hrubém Jeseníku, Česká republika. Bulletin mineralogicko-petrologického oddělení Národního muzea v Praze 24, 1: 25-31.
    • Vysočina Region
      • Třebíč
Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)]
Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)]
Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)]
France
 
  • Nouvelle-Aquitaine
    • Pyrénées-Atlantiques
      • Aramits
        • Ance
MONCHOUX P., FONTAN F., DE PARSEVAL P., MARTIN R. F., WANG R. C. (2006) - Igneous albitite dikes in orogenic lherzolithes, Western Pyrénées, France: A possible source for corundum and alkali feldspar xenocrysts in basaltic terranes. I. Mineralogical Asssociations. The Canadian Mineralogist, Vol. 44, pp. 817-842.
MONCHOUX P., FONTAN F., DE PARSEVAL P., MARTIN R. F., WANG R. C. (2006) - Igneous albitite dikes in orogenic lherzolithes, Western Pyrénées, France: A possible source for corundum and alkali feldspar xenocrysts in basaltic terranes. I. Mineralogical Asssociations. The Canadian Mineralogist, Vol. 44, pp. 817-842.
Germany
 
  • Rhineland-Palatinate
    • Eifel
      • Laach lake volcanic complex
        • Kruft
Blass, G., Emmerich, F., Graf, HW., Schäfer, Ch., Tschörtner, J., (2006): Minerale der Eifelvulkane, Version 1.0, CD, published by authors
        • Mendig
          • Niedermendig
Blass, G., Emmerich, F., Graf, HW., Schäfer, Ch., Tschörtner, J., (2006): Minerale der Eifelvulkane, Version 1.0, CD, published by authors
Blass, G., Emmerich, F., Graf, HW., Tschörtner, J., Minerale der Eifelvulkane, CD, published by authors, 2006
            • Wingertsberg
Blass, G., Emmerich, F., Graf, HW., Tschörtner, J., Minerale der Eifelvulkane, CD, published by authors, 2006
  • Saxony
    • Oberlausitz
      • Görlitz
J. W. Anthony et al.: Handbook of Mineralogy, Vol. III (1997)
      • Weißenberg
J. W. Anthony et al.: Handbook of Mineralogy, Vol. III (1997)
  • Thuringia
    • Wurzbach
      • Weitisberga
Wittern: "Mineralfundorte in Deutschland", 2001
Italy
 
  • Trentino-Alto Adige (Trentino-Südtirol)
    • Trento Province
      • Giudicarie Valleys
        • Breguzzo
          • San Pietro-Breguzzo Valley
            • Malga Trivena hut
Gieré, R., Williams, C.T. (1992): REE-bearing minerals in a Ti-rich vein from the Adamello contact aureole (Italy). Contributions to Mineralogy and Petrology, 112, 83-100.
Kazakhstan
 
  • Karagandy Province (Qaragandy Oblysy; Karaganda Oblast')
no reference
Mongolia
 
  • Hovd Aimag (Khovd Aimag)
    • Altai Mts
P.M. Kartashov analytical data
Namibia
 
  • Erongo Region
    • Swakopmund District
      • Arandis
Irene M. Abraham (2009): Geology and spatial distribution of uranium mineralisation in the SK anomaly area, Rossing area, Namibia, Master thesis University of the Witwatersrand.
Norway
 
  • Aust-Agder
    • Iveland
J. W. Anthony et al.: Handbook of Mineralogy, Vol. III (1997)
  • Finnmark
    • Hasvik
      • Sørøya
Nordrum, F.S. (2001): Noen funn av mineraler i Norge 2000-2001, part II. STEIN 28 (3): 16- 24
  • Vest-Agder
    • Flekkefjord
J. W. Anthony et al.: Handbook of Mineralogy, Vol. III (1997)
Russia
 
  • Far-Eastern Region
    • Khabarovskiy Kray
      • Aldan province
Pavel M. Kartashov data
  • Northern Region
    • Murmanskaya Oblast'
www.koeln.netsurf.de/~w.steffens/khib.htm
        • Kukisvumchorr Mt
Shlyukova Z.V. (1986) Mineralogy of contact formations of Khibina massif, - Moscow, Nauka, p. 96 (in Rus.)
www.koeln.netsurf.de/~w.steffens/lovo.htm
  • Urals Region
    • Southern Urals
      • Chelyabinsk Oblast'
        • Ilmen Mts
          • Ilmen Natural Reserve
P.M. Kartashov data
            • Dolgiye Mosty reserve-guard station
Berzelius, J. (1830) Mineralogie: Aeschynit. Jahres-Bericht über die Fortschritte der Physischen Wissenschaften: 9: 182-209; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Handbook of Mineralogy
The Canadian Mineralogist Vol. 39, pp. 1095-1104 (2001)
Handbook of Mineralogy
Handbook of Mineralogy
Slovakia
 
  • Košice Region
    • Rožňava Co.
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
South Korea
 
  • Chungcheongbukdo (Chungchong-pukto)
    • Chungju (Chung Won Kum; Chung-ju)
      • Joongwon-gun
        • Mt. Eorae
P.M. Kartashov data
Sweden
 
  • Medelpad
    • Sundsvall
Sandström, F., Binett, T., Wiklund, C. & Vikström, J. (2010): Alnöområdets geologi och mineralogi. Litiofilen. 27 (2):14-42
Switzerland
 
  • Grischun (Grisons; Graubünden)
    • Vorderrhein Valley
      • Tujetsch (Tavetsch)
J. W. Anthony et al.: Handbook of Mineralogy, Vol. III (1997)
  • Ticino (Tessin)
    • Leventina
J. W. Anthony et al.: Handbook of Mineralogy, Vol. III (1997)
USA
 
  • Colorado
    • Clear Creek Co.
      • Dailey District (Jones Pass District)
Minerals of Colorado (1997) Eckels, E. B.; USGS Open-File Report 80-661
  • Idaho
    • Elmore Co.
Ream, Lanny L. 2004. Idaho Minerals, 2nd edition, Revised and Updated
  • Montana
    • Ravalli Co.
      • Darby
J. W. Anthony et al.: Handbook of Mineralogy, Vol. III (1997)
  • North Carolina
    • Yancey Co.
      • Spruce Pine District
        • Burnsville
          • Hurricane Mountain
W.E,Hidden.,1882, Notes on some North Carolina Minerals,Jahrb.f.Min,1883,Vo.2,Ref,148-149,America Journal Of Science,1882,Vol.24,pg.372-374
Warner,Julie K.,and Ewing,Rodney C.,(1993) Crystal Chemistry Of Samarskite,American Mineralogist,Vol.78,pg.419-424,Table #2.Specimen #131,G.Lumkin,University of New Mexico
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