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Lucasite-(Ce)

A valid IMA mineral species
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03226160017056711239605.jpg
Lucasite-(Ce)

Koashva Open Pit, Koashva Mt, Khibiny Massif, Murmansk Oblast, Russia
08201790015542947088554.jpg
Lucasite-(Ce)

Koashva Open Pit, Koashva Mt, Khibiny Massif, Murmansk Oblast, Russia
06005970014950269394461.jpg
Lucasite-(Ce)

Koashva Mt, Khibiny Massif, Murmansk Oblast, Russia
00680300017056089409908.jpg
Lucasite-(Ce)

Koashva Open Pit, Koashva Mt, Khibiny Massif, Murmansk Oblast, Russia
04777160015540736347546.jpg
Lucasite-(Ce)

Koashva Open Pit, Koashva Mt, Khibiny Massif, Murmansk Oblast, Russia
06005970014950269394461.jpg
Lucasite-(Ce)

Koashva Mt, Khibiny Massif, Murmansk Oblast, Russia
03226160017056711239605.jpg
Lucasite-(Ce)

Koashva Open Pit, Koashva Mt, Khibiny Massif, Murmansk Oblast, Russia
08201790015542947088554.jpg
Lucasite-(Ce)

Koashva Open Pit, Koashva Mt, Khibiny Massif, Murmansk Oblast, Russia
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About Lucasite-(Ce)Hide

Formula:
CeTi2(O,OH)6
Colour:
Brown, grey
Lustre:
Resinous
Hardness:
6
Specific Gravity:
5.00 (Calculated)
Crystal System:
Monoclinic
Name:
Named in 1987 by Ernest H. Nickel, Ian E. Grey, and Ian C. Madsen in honor of Mr. Hans Lucas, Australian geologist with the CRA Exploration Pty. Ltd., who first noticed the mineral during examination of lamproite concentrates.
This page provides mineralogical data about Lucasite-(Ce).


Unique IdentifiersHide

Mindat ID:
2449
Long-form identifier:
mindat:1:1:2449:1
GUID
(UUID V4):
9ef85b23-4345-4f35-b205-03614023496b

IMA Classification of Lucasite-(Ce)Hide

Classification of Lucasite-(Ce)Hide

Strunz-mindat (2024):
4.DH.10

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
Dana 8th ed.:
8.3.5.1

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
3 : AB2O6
Hey's CIM Ref.:
7.9.10

7 : Oxides and Hydroxides
9 : Oxides of Ti

Mineral SymbolsHide

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

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

Physical Properties of Lucasite-(Ce)Hide

Lustre:
Resinous
Transparency:
Translucent
Colour:
Brown, grey
Hardness:
6 on Mohs scale
Hardness:
VHN10=761 - 900 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
Distinct/Good
Good on {001}, may be a parting
Fracture:
Sub-Conchoidal
Density:
5.00 g/cm3 (Calculated)

Optical Data of Lucasite-(Ce)Hide

Type:
Biaxial
Anisotropism:
weak
Dispersion:
none
Colour in reflected light:
gray
Internal Reflections:
brown

Chemistry of Lucasite-(Ce)Hide

Mindat Formula:
CeTi2(O,OH)6
Elements listed:
Ce, H, O, Ti - search for minerals with similar chemistry

Crystallography of Lucasite-(Ce)Hide

Crystal System:
Monoclinic
Cell Parameters:
a = 5.178(1) Å, b = 8.756(4) Å, c = 9.768(5) Å
β = 93.52(4)°
Ratio:
a:b:c = 0.591 : 1 : 1.116
Unit Cell V:
442.03 ų (Calculated from Unit Cell)
Z:
4
Comment:
Point Group: 2/m or m.; : Space Group: C2/c or Cc; structure refined in I2/a

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0001128Lucasite-(Ce)Nickel E H, Grey I E, Madsen I C (1987) Lucasite-(Ce), CeTi2(O,OH)6, a new mineral from Western Australia: Its description and structure American Mineralogist 72 1006-101019870293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.376 Å(10)
3.203 Å(8)
2.584 Å(7)
3.257 Å(6)
1.8306 Å(6)
2.225 Å(5)
2.541 Å(4)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Near-surface Processes
26 : Hadean detrital minerals
Stage 4b: Highly evolved igneous rocks>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of Lucasite-(Ce)Hide

Type Locality:
ⓘ Argyle Diamond Mine, Wyndham-East Kimberley Shire, Western Australia, Australia
General Appearance of Type Material:
discrete subhedral grains
Place of Conservation of Type Material:
Western Australia Museum, Perth, M.75.1991; Museum Victoria, Melbourne, Australia, M38083; The Natural History Museum, London, England; National Museum of Natural History, Washington, D.C., USA, 163783.
Geological Setting of Type Material:
olivine lamproite diatreme
Associated Minerals at Type Locality:
CalciteDolomiteTalcTitaniteTitanite
Amphibole Supergroup
Reference:
Nickel, E.H., Grey, I.E., Madsen, I.C. (1987) Lucasite-(Ce), CeTi2(O,OH)6, a new mineral from Western Australia: Its, description and structure. American Mineralogist: 72: 1006-1010.

Synonyms of Lucasite-(Ce)Hide

Other Language Names for Lucasite-(Ce)Hide

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Lucasite-(Ce) associated with AegirineNaFe3+Si2O6

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.15 vaAlumotungstite◻2W2O6(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.15Hydrokenoelsmoreite◻2W2O6(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 (Pb1.5◻0.5)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.15Hydroxynatropyrochlore(Na,Ca,Ce)2Nb2O6(OH)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(Bi1.33◻0.67)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+1.5◻0.5)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

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 Lucasite-(Ce)Hide

References for Lucasite-(Ce)Hide

Localities for Lucasite-(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 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
 
  • Huíla Province
    • Quilengues
Amores-Casals et al. (2019)
Australia (TL)
 
  • Western Australia
    • Wyndham-East Kimberley Shire
[Nickel & Nichols +1 other reference
Canada
 
  • British Columbia
    • Golden Mining Division
Canadian Museum of Nature collection
Norway
 
  • Buskerud
    • Flesberg
      • Vinoren Silver Mine Field
        • Vinoren Southern Mines
Zozulya et al. (2020)
Russia
 
  • Murmansk Oblast
    • Khibiny Massif
PEKOV et al. (2013)
In the collection of Lukasz Kruszewski.
  • Primorsky Krai
    • Mikhaylovsky District
V.V. Seredin data
South Africa
 
  • North West
    • Bojanala Platinum District Municipality
      • Moses Kotane Local Municipality
Mitchell et al. (2004)
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