Taipingite-(CeCa)
A valid IMA mineral species
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Formula:
(Ce7Ca2)◻Mg(SiO4)3[SiO3(OH)]4F3
formerly given as: (Ce7Ca2)E9Mg(SiO4)3[SiO3(OH)]4F3 (minor difference)
Colour:
light red to pinkish brown
Lustre:
Vitreous
Hardness:
5½
Specific Gravity:
4.900 (Calculated)
Crystal System:
Trigonal
Member of:
Name:
For the type locality (Taiping town); the term “Taiping” in Chinese means good fortune, as in peace and tranquility.
Unique Identifiers
Mindat ID:
53680
Long-form identifier:
mindat:1:1:53680:2
Similar Names
| Dypingite | A valid IMA mineral species | Mg5(CO3)4(OH)2 · 5H2O |
IMA Classification of Taipingite-(CeCa)
Approved
IMA Formula:
(Ce3+7Ca2)◻Mg(SiO4)3[SiO3(OH)]4F3
Approval year:
2019
Approval history:
name & formula changes: May 2023 IMA proposals
Type description reference:
Qu, Kai; Sima, Xianzhang; Fan, Guang; Li, Guowu; Shen, Ganfu; Chen, Huakai; Liu, Xing; Yin, Qingqing; Li, Ting; Wang, Yanjuan (2020) Taipingite-(Ce), (Ce73+,Ca2)Σ9Mg(SiO4)3[SiO3(OH)]4F3, a new mineral from the Taipingzhen REE deposit, North Qinling Orogen, central China. Geoscience Frontiers, 11 (6). 2339-2346 doi:10.1016/j.gsf.2020.02.006
Classification of Taipingite-(CeCa)
9.AG.12
9 : SILICATES (Germanates)
A : Nesosilicates
G : Nesosilicates with additional anions; cations in > [6] +- [6] coordination
9 : SILICATES (Germanates)
A : Nesosilicates
G : Nesosilicates with additional anions; cations in > [6] +- [6] coordination
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 |
|---|---|---|
| Tpg-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 Taipingite-(CeCa)
Vitreous
Transparency:
Transparent, Translucent
Colour:
Light red to pinkish brown
Streak:
Grayish-white
Hardness:
5½ on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Parting:
None
Fracture:
Conchoidal
Density:
4.900(5) g/cm3 (Calculated)
Optical Data of Taipingite-(CeCa)
Type:
Uniaxial (+)
RI values:
nω = 1.808(5) nε = 1.812(7)
Max. Birefringence:
δ = 0.004
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:
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
Interference Figure:
This shows the idealized uniaxial interference figure - the conoscopic
(convergent-light, Bertrand-lens-in) view, for a grain cut with the optic axis
centred and vertical. The coloured rings are isochromatics, computed with the
same physics as the Michel-Lévy bar above; the dark cross is the isogyre.
For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.
For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.
Comments:
pale brown to colorless in thin section
Chemistry of Taipingite-(CeCa)
Mindat Formula:
(Ce7Ca2)◻Mg(SiO4)3[SiO3(OH)]4F3
formerly given as: (Ce7Ca2)E9Mg(SiO4)3[SiO3(OH)]4F3 (minor difference)
formerly given as: (Ce7Ca2)E9Mg(SiO4)3[SiO3(OH)]4F3 (minor difference)
Element Weights:
Crystallography of Taipingite-(CeCa)
Crystal System:
Trigonal
Class (H-M):
3m - Ditrigonal Pyramidal
Space Group:
R3c
Cell Parameters:
a = 10.7246(3) Å, c = 37.953(1) Å
Ratio:
a:c = 1 : 3.539
Unit Cell V:
3,780.41 ų (Calculated from Unit Cell)
Z:
6
Twinning:
None
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.518 Å | (50) |
| 3.455 Å | (95) |
| 3.297 Å | (85) |
| 3.098 Å | (35) |
| 2.941 Å | (100) |
| 2.683 Å | (65) |
| 1.945 Å | (40) |
| 1.754 Å | (40) |
Reference:
Qu, Kai; Sima, Xianzhang; Fan, Guang; Li, Guowu; Shen, Ganfu; Chen, Huakai; Liu, Xing; Yin, Qingqing; Li, Ting; Wang, Yanjuan (2020) Taipingite-(Ce), (Ce73+,Ca2)Σ9Mg(SiO4)3[SiO3(OH)]4F3, a new mineral from the Taipingzhen REE deposit, North Qinling Orogen, central China. Geoscience Frontiers, 11 (6). 2339-2346 doi:10.1016/j.gsf.2020.02.006
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) | |
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites |
Type Occurrence of Taipingite-(CeCa)
General Appearance of Type Material:
subhedral grains (up to approximately 100 μm 200 μm) commonly intergrown with the REE mineral assemblages
Place of Conservation of Type Material:
Mineralogical collection of the Geological Museum of China, No. 16, Yangrou Hutong, Xisi, Beijing 100031, People’s Republic of China, catalogue number M16084
Geological Setting of Type Material:
REE deposit is a hydrothermal ore-forming system that formed in a retrograde metamorphic setting during the late Paleozoic postcollisional extension event in the NQO.
Associated Minerals at Type Locality:
Reference:
Qu, Kai; Sima, Xianzhang; Fan, Guang; Li, Guowu; Shen, Ganfu; Chen, Huakai; Liu, Xing; Yin, Qingqing; Li, Ting; Wang, Yanjuan (2020) Taipingite-(Ce), (Ce73+,Ca2)Σ9Mg(SiO4)3[SiO3(OH)]4F3, a new mineral from the Taipingzhen REE deposit, North Qinling Orogen, central China. Geoscience Frontiers, 11 (6). 2339-2346 doi:10.1016/j.gsf.2020.02.006
Synonyms of Taipingite-(CeCa)
Other Language Names for Taipingite-(CeCa)
Dutch:Taipingiet-(CeCa)
German:Taipingit-(CeCa)
Relationship of Taipingite-(CeCa) to other Species
Member of:
Other Members of Taipingite Subgroup:
| Aluminotaipingite-(CeCa) | (Ce6Ca3)◻Al(SiO4)3[SiO3(OH)]4F3 | Trig. 3m : R3c |
Related Minerals - Strunz-mindat Grouping
| 9.AG. | Aluminotaipingite-(CeCa) | (Ce6Ca3)◻Al(SiO4)3[SiO3(OH)]4F3 |
| 9.AG. | 'Ivanyukite-Na-T' | Na2Ti4(SiO4)3(OH)O3 · 7H2O |
| 9.AG. | 'Ivanyukite-Na-C' | Na2Ti4(SiO4)3(OH)2O2 · 6H2O |
| 9.AG. | Edgrewite | Ca9(SiO4)4F2 |
| 9.AG.02 | Gatedalite | ZrMn2+2Mn3+4SiO12 |
| 9.AG.05 | Abswurmbachite | CuMn3+6(SiO4)O8 |
| 9.AG.05 | Neltnerite | CaMn3+6(SiO4)O8 |
| 9.AG.05 | Skogbyite | Zr(Mg2Mn3+4)SiO12 |
| 9.AG.05 | Braunite | Mn2+Mn3+6(SiO4)O8 |
| 9.AG.05 | 'Braunite-II' | Ca(Mn3+,Fe)14(SiO4)O20 |
| 9.AG.10 | Långbanite | Mn2+4Mn3+9Sb5+O16(SiO4)2 |
| 9.AG.15 | Żabińskiite | Ca[Al0.5(Ta,Nb)0.5)]O(SiO4) |
| 9.AG.15 | Titanite | CaTiO(SiO4) |
| 9.AG.15 | Vanadomalayaite | CaVO(SiO4) |
| 9.AG.15 | Natrotitanite | (Na0.5Y0.5)TiO(SiO4) |
| 9.AG.15 | Malayaite | CaSnO(SiO4) |
| 9.AG.20 | Ferricerite-(LaCa) | (La6Ca3)◻Fe3+(SiO4)3(SiO3OH)4(OH)3 |
| 9.AG.20 | Aluminocerite-(CeCa) | (Ce6Ca3)◻Al(SiO4)3[SiO3(OH)]4(OH)3 |
| 9.AG.20 | Cerite-(CeCa) | (Ce7Ca2)◻Mg(SiO4)3(SiO3OH)4(OH)3 |
| 9.AG.20 | Nipeiite-(Ce) | Ce9Fe3+(SiO4)6[SiO3(OH)](OH)3 |
| 9.AG.25 | 'Yftisite-(Y)' | (Y,Dy,Er)4(Ti,Sn)(SiO4)2O(F,OH)6 |
| 9.AG.25 | Mieite-(Y) | Y4Ti(SiO4)2O[F,(OH)]6 |
| 9.AG.25 | Trimounsite-(Y) | Y2Ti2(SiO4)O5 |
| 9.AG.30 | Sitinakite | KNa2Ti4(SiO4)2O5(OH) · 4H2O |
| 9.AG.35 | Kittatinnyite | Ca2Mn2Mn(SiO4)2(OH)4 · 9H2O |
| 9.AG.40b | Paranatisite | Na2Ti(SiO4)O |
| 9.AG.40a | Natisite | Na2Ti(SiO4)O |
| 9.AG.45 | Törnebohmite-(Ce) | Ce2Al(SiO4)2(OH) |
| 9.AG.45 | Törnebohmite-(La) | La2Al(SiO4)2(OH) |
| 9.AG.50 | Ivanyukite-Na | Na2Ti4(SiO4)3(OH)2O2 · 6H2O |
| 9.AG.50 | Ivanyukite-K | K2Ti4(SiO4)3(OH)2O2 · 9H2O |
| 9.AG.50 | Ivanyukite-Cu | CuTi4(SiO4)3(OH)2O2 · 7H2O |
| 9.AG.50 | Kuliokite-(Y) | Y4Al(SiO4)2(OH)2F5 |
| 9.AG.50 | Hydroxyledgrewite | Ca9(SiO4)4(OH)2 |
| 9.AG.52 | Ulfanderssonite-(Ce) | (Ce15Ca)Σ16Mg2(SiO4)10(SiO3OH)(OH,F)5Cl3 |
| 9.AG.55 | Chantalite | CaAl2(SiO4)(OH)4 |
| 9.AG.60 | Vuagnatite | CaAl(SiO4)(OH) |
| 9.AG.60 | Mozartite | CaMn3+(SiO4)(OH) |
| 9.AG.65 | Hatrurite | Ca3(SiO4)O |
| 9.AG.70 | Jasmundite | Ca11(SiO4)4O2S |
| 9.AG.75 | Afwillite | Ca3[SiO4][SiO2(OH)2] · 2H2O |
| 9.AG.80 | Bultfonteinite | Ca2(HSiO4)F · H2O |
| 9.AG.85 | Zoltaiite | BaV4+2V3+12(SiO4)2O19 |
| 9.AG.90 | Tranquillityite | (Fe2+,Ca)8(Zr,Y)2Ti3(SiO4)3O12 |
Other Information
Notes:
insoluble in HCl, HNO3 and H2SO4
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 Taipingite-(CeCa)
mindat.org URL:
https://www.mindat.org/min-53680.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Taipingite-(CeCa)
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2019) CNMNC Newsletter No 50, New minerals and nomenclature modifications approved in 2019. Mineralogical Magazine, 83 (4) 615-620 doi:10.1180/mgm.2019.46
Qu, Kai; Sima, Xianzhang; Fan, Guang; Li, Guowu; Shen, Ganfu; Chen, Huakai; Liu, Xing; Yin, Qingqing; Li, Ting; Wang, Yanjuan (2020) Taipingite-(Ce), (Ce73+,Ca2)Σ9Mg(SiO4)3[SiO3(OH)]4F3, a new mineral from the Taipingzhen REE deposit, North Qinling Orogen, central China. Geoscience Frontiers, 11 (6). 2339-2346 doi:10.1016/j.gsf.2020.02.006
Localities for Taipingite-(CeCa)
Showing 3 localities.
symbol to view information about a locality.
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.
China (TL) | |
| Qu K. +2 other references |
Sweden | |
| Andersson et al. (2024) |
| Andersson et al. (2024) |
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