Lukechangite-(Ce)
A valid IMA mineral species
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About Lukechangite-(Ce)
Luke L. Y. Chang
Formula:
Na3Ce2(CO3)4F
Colour:
Colorless to pale beige
Lustre:
Vitreous
Hardness:
4½
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).
Unique Identifiers
Mindat ID:
7159
Long-form identifier:
mindat:1:1:7159:4
IMA Classification of Lukechangite-(Ce)
Approved
IMA Formula:
Na3Ce3+2(CO3)4F
Approval year:
1996
First published:
1997
Classification of Lukechangite-(Ce)
5.BD.05
5 : CARBONATES (NITRATES)
B : Carbonates with additional anions, without H2O
D : With rare earth elements (REE)
5 : CARBONATES (NITRATES)
B : Carbonates with additional anions, without H2O
D : With rare earth elements (REE)
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Luk-Ce | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Lukechangite-(Ce)
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}
{0001}
Fracture:
Irregular/Uneven, Conchoidal
Density:
4.02 g/cm3 (Calculated)
Comment:
Measured greater than 3.3
Optical Data of Lukechangite-(Ce)
Type:
Uniaxial (-)
RI values:
nω = 1.728 nε = 1.542
Max. Birefringence:
δ = 0.186
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate
Chemistry of Lukechangite-(Ce)
Mindat Formula:
Na3Ce2(CO3)4F
Element Weights:
Crystallography of Lukechangite-(Ce)
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}, {1120}, and {ll2l}.
Forms: {0001}, {1120}, and {ll2l}.
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) |
|---|---|---|---|---|---|---|---|
| 0001952 | Lukechangite-(Ce) | Grice J D, Chao G Y (1997) Lukechangite-(Ce), a new rare-earth-fluorocarbonate mineral from Mont Saint-Hilaire, Quebec American Mineralogist 82 1255-1260 |  | 1997 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.71 Å | (50) |
| 4.31 Å | (100) |
| 3.804 Å | (50) |
| 3.169 Å | (70) |
| 2.877 Å | (60) |
| 2.534 Å | (70) |
| 2.192 Å | (90 broad) |
| 1.978 Å | (70) |
| 1.658 Å | (50) |
Reference:
Comments:
Poudrette quarry, Mont Saint-Hilaire, Québec, Canada. The data are from the type description.
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 Lukechangite-(Ce)
General Appearance of Type Material:
Tabular, short prismatic, and barrel-shaped crystals up to 1 mm.
Place of Conservation of Type Material:
Canadian Museum of Nature, Ottawa, Ontario, Canada, catalogue no. CMNMI 81535 (cotype).
Geological Setting of Type Material:
In a pegmatite dike in a nepheline syenite intrusion.
Associated Minerals at Type Locality:
Synonyms of Lukechangite-(Ce)
Other Language Names for Lukechangite-(Ce)
Related Minerals - Strunz-mindat Grouping
| 5.BD. | Cordylite-(La) | (Na,Ca)Ba(La,Ce,Sr)2(CO3)4F |
| 5.BD.05 | Cordylite-(Ce) | NaBaCe2(CO3)4F |
| 5.BD.05 | 'Unnamed (Cordylite-like Calcium-Barium-Cerium Carbonate-Fluoride)' | Ca◻Ba2Ce4[CO3]8F2 |
| 5.BD.10 | 'Zhonghuacerite-(Ce)' | Ba2Ce(CO3)3F |
| 5.BD.10 | Kukharenkoite-(Ce) | Ba2Ce(CO3)3F |
| 5.BD.10 | Kukharenkoite-(La) | Ba2(La,Ce,Th)(CO3)3F |
| 5.BD.15 | Cebaite-(Ce) | Ba3Ce2(CO3)5F2 |
| 5.BD.15 | 'Cebaite-(Nd)' | Ba3(Nd,Ce)2(CO3)5F2 |
| 5.BD.18 | Arisite-(Ce) | NaCe2(CO3)2[F2x(CO3)1-x]F |
| 5.BD.18 | Arisite-(La) | NaLa2(CO3)2[F2x(CO3)1-x]F |
| 5.BD.20c | Synchysite-(Ce) | CaCe(CO3)2F |
| 5.BD.20c | Synchysite-(Nd) | CaNd(CO3)2F |
| 5.BD.20c | Synchysite-(Y) | CaY(CO3)2F |
| 5.BD.20a | Bastnäsite-(Ce) | Ce(CO3)F |
| 5.BD.20b | Parisite-(Ce) | CaCe2(CO3)3F2 |
| 5.BD.20a | Bastnäsite-(La) | La(CO3)F |
| 5.BD.20b | Parisite-(Nd) | Ca(Nd,Ce,La)2(CO3)3F2 |
| 5.BD.20a | Bastnäsite-(Y) | Y(CO3)F |
| 5.BD.20b | Parisite-(La) | CaLa2(CO3)3F2 |
| 5.BD.20d | Röntgenite-(Ce) | Ca2(Ce,La)3(CO3)5F3 |
| 5.BD.20a | Thorbastnäsite | ThCa(CO3)2F2 · 3H2O |
| 5.BD.20a | Hydroxylbastnäsite-(Ce) | Ce(CO3)(OH) |
| 5.BD.20a | Hydroxylbastnäsite-(Nd) | Nd(CO3)(OH) |
| 5.BD.20c | 'Hydroxylsynchysite-(Ce)' | Ca(Ce,La)(CO3)2(OH) |
| 5.BD.20c | 'Synchysite-(La)' | Ca(La,Nd)(CO3)2F |
| 5.BD.20a | Bastnäsite-(Nd) | Nd(CO3)F |
| 5.BD.20a | Hydroxylbastnäsite-(La) | (La,Nd,Ce)(CO3)(OH,F) |
| 5.BD.25 | Qaqarssukite-(Ce) | Ba(Ce,REE)(CO3)2F |
| 5.BD.25 | Horváthite-(Y) | NaY(CO3)F2 |
| 5.BD.35 | Huanghoite-(Ce) | BaCe(CO3)2F |
| 5.BD.35 | Huanghoite-(Nd) | BaNd(CO3)2F |
| 5.BD.45 | Bayanoboite-(Y) | Ba2Y(CO3)2F3 |
Fluorescence of Lukechangite-(Ce)
None observed
Other Information
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.
Internet Links for Lukechangite-(Ce)
mindat.org URL:
https://www.mindat.org/min-7159.html
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Please feel free to link to this page.
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References for Lukechangite-(Ce)
Localities for Lukechangite-(Ce)
Showing 1 localities.
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The 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.
Canada (TL) | |
| Grice et al. (1997) +1 other reference |
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Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada