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Lukechangite-(Ce)

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About Lukechangite-(Ce)Hide

Luke L. Y. Chang
Formula:
Na3Ce2(CO3)4F
Colour:
colorless to pale beige
Lustre:
Vitreous
Hardness:
Specific Gravity:
4.02 (Calculated)
Crystal System:
Hexagonal
Name:
Named in honor of Luke L. Y. Chang (18 September 1934 - 3 August 2009, Silver Spring, Maryland, USA) Professor, University of Maryland, for his contributions to the study of carbonate group minerals. The suffix follows the nomenclature (Levinson rule) for rare earth elements.
This page provides mineralogical data about Lukechangite-(Ce).


Classification of Lukechangite-(Ce)Hide

Approved
First Published:
1997
5/C.07-175
5.BD.05

5 : CARBONATES (NITRATES)
B : Carbonates with additional anions, without H2O
D : With rare earth elements (REE)

Physical Properties of Lukechangite-(Ce)Hide

Vitreous
Transparency:
Transparent
Comment:
Somewhat pearly on {0001}
Colour:
colorless to pale beige
Streak:
White
Hardness:
4½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
{0001}
Fracture:
Irregular/Uneven, Conchoidal
Density:
4.02 g/cm3 (Calculated)
Comment:
Measured greater than 3.3

Optical Data of Lukechangite-(Ce)Hide

Type:
Uniaxial (-)
RI values:
nω = 1.728 nε = 1.542
Max Birefringence:
δ = 0.186
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of Lukechangite-(Ce)Hide

Formula:
Na3Ce2(CO3)4F

Crystallography of Lukechangite-(Ce)Hide

Crystal System:
Hexagonal
Class (H-M):
6mm - Dihexagonal Pyramidal
Space Group:
P63mc
Setting:
P63mc
Cell Parameters:
a = 5.068 Å, c = 22.87 Å
Ratio:
a:c = 1 : 4.513
Unit Cell V:
509 ų
Z:
2
Morphology:
Type material: tabular or short prismatic to barrel shaped crystals.
Forms: {0001}, {11-20}, and {ll-2l}

Type Occurrence of Lukechangite-(Ce)Hide

Place of Conservation of Type Material:
Canadian Museum of Nature catalogue no. CMNMI 81535.
Reference:
Grice, J.D., and Chaso, G.Y. (1997) Lukechangite (Ce), a new rare earth fluorocarbonate mineral from Mont Saint Hilaire, Quebec. American Mineralogist: 82: 1255-1260.

Synonyms of Lukechangite-(Ce)Hide

Other Language Names for Lukechangite-(Ce)Hide

Related Minerals - Nickel-Strunz GroupingHide

5.BD.05Cordylite-(Ce)NaBaCe2(CO3)4F Hex.
5.BD.10Zhonghuacerite-(Ce)Ba2Ce(CO3)3FTrig.
5.BD.10Kukharenkoite-(Ce)Ba2Ce(CO3)3FMon. 2/m : P21/m
5.BD.10Kukharenkoite-(La)Ba2(La,Ce,Th)(CO3)3FMon. 2/m : P21/m
5.BD.15Cebaite-(Ce)Ba3Ce2(CO3)5F2
5.BD.15Cebaite-(Nd)Ba3(Nd,Ce)2(CO3)5F2Mon.
5.BD.18Arisite-(Ce)NaCe2(CO3)2[F2x(CO3)1-x]FHex. 6 m2 : P6m2
5.BD.18Arisite-(La)NaLa2(CO3)2[F2x(CO3)1-x]FHex. 6 m2 : P6m2
5.BD.20aBastnäsite-(Ce)Ce(CO3)FHex. 6 m2 : P6c2
5.BD.20aBastnäsite-(La)La(CO3)FHex.
5.BD.20aBastnäsite-(Y)Y(CO3)FHex. 6 m2 : P62c
5.BD.20aHydroxylbastnäsite-(Ce)Ce(CO3)(OH)Hex. 6 : P6
5.BD.20aHydroxylbastnäsite-(Nd)Nd(CO3)(OH)Hex.
5.BD.20aHydroxylbastnäsite-(La)(La,Nd,Ce)(CO3)(OH,F)Hex.
5.BD.20bParisite-(Ce)CaCe2(CO3)3F2Mon. m : Bb
5.BD.20bParisite-(Nd)Ca(Nd,Ce,La)2(CO3)3F2
5.BD.20dRöntgenite-(Ce)Ca2(Ce,La)3(CO3)5F3Trig. 3 : R3
5.BD.20cSynchysite-(Ce)CaCe(CO3)2FMon. 2/m : B2/b
5.BD.20cSynchysite-(Nd)CaNd(CO3)2F
5.BD.20cSynchysite-(Y)CaY(CO3)2FMon. 2/m : B2/b
5.BD.20aThorbastnäsiteThCa(CO3)2F2 · 3H2O
5.BD.20aBastnäsite-(Nd)Nd(CO3)F Hex. 6 m2 : P62c
5.BD.25Horváthite-(Y)NaY(CO3)F2Orth. mmm (2/m 2/m 2/m) : Pmmn
5.BD.25Qaqarssukite-(Ce)Ba(Ce,REE)(CO3)2FTrig. 3 : P3
5.BD.35Huanghoite-(Ce)BaCe(CO3)2FTrig. 3m (3 2/m) : R3m

Fluorescence of Lukechangite-(Ce)Hide

None observed

Other InformationHide

Notes:
Soluble in 1:1 HCl with effervescence
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Lukechangite-(Ce)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Grice, J.D., and Chaso, G.Y. (1997) Lukechangite (Ce), a new rare earth fluorocarbonate mineral from Mont Saint Hilaire, Quebec. American Mineralogist: 82: 1255-1260.
Horváth, L., Pfenninger Horváth, E. (2000) I minerali di Mont-Saint-Hilaire (Québec, Canada) Rivista Mineralogica Italiana: XXIV: 140-202 (in Italian with English summary).

Internet Links for Lukechangite-(Ce)Hide

Localities for Lukechangite-(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.
Canada (TL)
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
Grice, J.D. and Chao, G.Y. (1997), Lukechangite-(Ce), a new rare-earth-fluorocarbonate mineral from Mont Saint-Hilaire, Quebec. American Mineralogist: 82: 1255-1260. HORVÁTH, L., PFENNINGER HORVÁTH, E. (2000) I minerali di Mont-Saint-Hilaire (Québec, Canada) Rivista Mineralogica Italiana, XXIV, 140-202 (in Italian with English summary).
Mineral and/or Locality  
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