Cheralite
A valid IMA mineral species - grandfathered
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About Cheralite
Formula:
CaTh(PO4)2
Colour:
Grayish brown to reddish brown (on rims), pale yellow, brownish green ("brabantite")
Lustre:
Vitreous
Hardness:
5
Specific Gravity:
4.72 - 5.02
Crystal System:
Monoclinic
Member of:
Name:
Named after Chera, an ancient kingdom in southern India, that includes the type locality.
Monazite Group. The CaTh(PO4)2-dominant member of the group. Formerly known as brabantite.
Redefined by Linthout (2007).
Not to be confused with the discredited cheralite-(Ce) (= Ca-rich monazite-(Ce)).
Compare 'UM1979-07-PO:CaFeHREESiTh'; 'UM1979-08-PO:CCaFeHREESiTh', 'UM1979-10-PO:FeHREETh' and 'UM1980-04-PO:CaHREETh'.
Redefined by Linthout (2007).
Not to be confused with the discredited cheralite-(Ce) (= Ca-rich monazite-(Ce)).
Compare 'UM1979-07-PO:CaFeHREESiTh'; 'UM1979-08-PO:CCaFeHREESiTh', 'UM1979-10-PO:FeHREETh' and 'UM1980-04-PO:CaHREETh'.
Unique Identifiers
Mindat ID:
6865
Long-form identifier:
mindat:1:1:6865:5
GUID
(UUID V4):
(UUID V4):
92bbff0b-b899-478b-9ac9-030486a13fd8
IMA Classification of Cheralite
Approved, 'Grandfathered' (first described prior to 1959)
IMA status notes:
Redefined by the IMA
First published:
1953
Approval history:
Redefined IMA 05-F: The name cheralite is applied to the members dominated by CaTh(PO4)2 in the system 2(REEPO4) - CaTh(PO4)2 - 2(ThSiO4); the name brabantite is discredited. See Linthout (2007).
Classification of Cheralite
8.AD.50
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
D : With only large cations
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
D : With only large cations
38.4.3.5
38 : ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
4 : AXO4
38 : ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
4 : AXO4
Mineral Symbols
As of 2021 there are now IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMAâCNMNC symbol. Older variants are listed for historical use only.
Please only use the official IMAâCNMNC symbol. Older variants are listed for historical use only.
Symbol | Source | Reference |
---|---|---|
Cher | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Crl | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of Cheralite
Vitreous
Comment:
Dull or greasy ("brabantite")
Colour:
Grayish brown to reddish brown (on rims), pale yellow, brownish green ("brabantite")
Comment:
brown-gray in thin section ("brabantite")
Hardness:
5 on Mohs scale
Density:
4.72 - 5.02 g/cm3 (Measured) 5.26 g/cm3 (Calculated)
Comment:
all data for "brabantite"; measured after heating to 900oC
Optical Data of Cheralite
Type:
Biaxial (+)
RI values:
nα = 1.779 nβ = 1.780 nγ = 1.817
2V:
Measured: 17° to 20°, Calculated: 20°
Max Birefringence:
δ = 0.038
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
weak
Comments:
for "brabantite": nα = 1.691, nÎČ = 1.696â1.73, nÎł = 1.725 2V (measured) = 44âŠ
Chemistry of Cheralite
Mindat Formula:
CaTh(PO4)2
Elements listed:
Common Impurities:
Si,REE
Crystallography of Cheralite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 6.726(1) Å, b = 6.933(5) Å, c = 6.447(12) Å
β = 103.93(27)°
β = 103.93(27)°
Ratio:
a:b:c = 0.97 : 1 : 0.93
Unit Cell V:
291.79 Ă
Âł (Calculated from Unit Cell)
Z:
2
Comment:
Space group P21/n; data for "brabantite"
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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Big Balls | Small Balls | Just Balls | Spacefill
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CIF File Best | x | y | z | a | b | c
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Rotation
Stop | Start
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Labels
Console Off | On | Grey | Yellow
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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) |
---|---|---|---|---|---|---|---|
0000152 | Cheralite | Finney J J, Rao N N (1967) The crystal structure of cheralite American Mineralogist 52 13-19 | 1967 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.06 Ă | (100) |
2.85 Ă | (75) |
3.26 Ă | (70) |
4.15 Ă | (30) |
1.947 Ă | (30) |
3.46 Ă | (25) |
2.14 Ă | (25) |
Comments:
data for "brabantite"
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 4b: Highly evolved igneous rocks | >3.0 |
34 : Complex granite pegmatites | |
36 : Carbonatites, kimberlites, and related igneous rocks |
Geological Setting:
e.g., a rare-metal-bearing pegmatite (Xinjiang Uygur Autonomous Region, China) & Kuttankuli, India
Type Occurrence of Cheralite
Co-Type Localities:
General Appearance of Type Material:
"brabantite": elongated crystals; aggregates to 1.5 cm; massive, fine-granular
Place of Conservation of Type Material:
Natural History Museum, London, United Kingdom, number BM 1947,344 (holotype, India).
Institute for Mineralogy and Crystallography, Berlin Technical University, Berlin, Germany, number 81/40 (holotype, Namibia).
National Museum of Natural History, Washington, D.C., USA, number 149681 (type, Namibia).
Institute for Mineralogy and Crystallography, Berlin Technical University, Berlin, Germany, number 81/40 (holotype, Namibia).
National Museum of Natural History, Washington, D.C., USA, number 149681 (type, Namibia).
Geological Setting of Type Material:
zoned granite pegmatite ("brabantite")
Associated Minerals at Type Locality:
Synonyms of Cheralite
Other Language Names for Cheralite
Relationship of Cheralite to other Species
Member of:
Other Members of this group:
Gasparite-(Ce) | Ce(AsO4) | Mon. 2/m |
Gasparite-(La) | La(AsO4) | Mon. 2/m |
Huttonite | ThSiO4 | Mon. 2/m |
Monazite | REE(PO4) | |
Monazite-(Gd) | Gd(PO4) | Mon. |
Rooseveltite | Bi(AsO4) | Mon. 2/m |
Unnamed (Nd-dominant Gasparite) | NdAsO4 | Mon. 2/m |
Common Associates
Associated Minerals Based on Photo Data:
6 photos of Cheralite associated with Pyrite | FeS2 |
5 photos of Cheralite associated with Siderite | FeCO3 |
4 photos of Cheralite associated with Quartz | SiO2 |
4 photos of Cheralite associated with Monazite-(Ce) | Ce(PO4) |
2 photos of Cheralite associated with Euxenite-(Y) | (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)2O6 |
2 photos of Cheralite associated with Calcite | CaCO3 |
2 photos of Cheralite associated with Fluorapatite | Ca5(PO4)3F |
2 photos of Cheralite associated with Rutile | TiO2 |
2 photos of Cheralite associated with BastnÀsite-(Ce) | Ce(CO3)F |
1 photo of Cheralite associated with Xenotime-(Y) | Y(PO4) |
Related Minerals - Strunz-mindat Grouping
8.AD. | Keplerite | Ca9(Ca0.5â»0.5)Mg(PO4)7 |
8.AD. | Deynekoite | Ca9â»Fe3+(PO4)7 |
8.AD. | Mazorite | Ba3(PO4)2 |
8.AD. | Monazite-(Gd) | Gd(PO4) |
8.AD.05 | Nahpoite | Na2(PO3OH) |
8.AD.10 | Monetite | Ca(PO3OH) |
8.AD.10 | Weilite | Ca(HAsO4) |
8.AD.10 | Ć venekite | Ca(H2AsO4)2 |
8.AD.15 | Archerite | (K,NH4)(H2PO4) |
8.AD.15 | Biphosphammite | NH4(H2PO4) |
8.AD.20 | Phosphammite | (NH4)2(PO3OH) |
8.AD.25 | Buchwaldite | NaCa(PO4) |
8.AD.30 | Schultenite | Pb(HAsO4) |
8.AD.35 | Chernovite-(Y) | Y(AsO4) |
8.AD.35 | Dreyerite | Bi(VO4) |
8.AD.35 | Wakefieldite-(Ce) | Ce(VO4) |
8.AD.35 | Wakefieldite-(Y) | Y(VO4) |
8.AD.35 | Xenotime-(Y) | Y(PO4) |
8.AD.35 | Chernovite-(Ce) | (Ce,Y)(AsO4) |
8.AD.35 | Pretulite | Sc(PO4) |
8.AD.35 | Xenotime-(Yb) | Yb(PO4) |
8.AD.35 | Wakefieldite-(La) | La(VO4) |
8.AD.35 | Wakefieldite-(Nd) | Nd(VO4) |
8.AD.35 | Xenotime-(Gd) | Gd(PO4) |
8.AD.40 | Pucherite | Bi(VO4) |
8.AD.45 | Ximengite | Bi(PO4) |
8.AD.50 | Gasparite-(Ce) | Ce(AsO4) |
8.AD.50 | Monazite-(Ce) | Ce(PO4) |
8.AD.50 | Monazite-(La) | La(PO4) |
8.AD.50 | Monazite-(Nd) | Nd(PO4) |
8.AD.50 | Rooseveltite | Bi(AsO4) |
8.AD.50 | Monazite-(Sm) | Sm(PO4) |
8.AD.50 | UM2005-35-VO:CaFePSiTh | (Th,Ca)(VO4,SiO4,PO4) |
8.AD.50 | Gasparite-(La) | La(AsO4) |
8.AD.55 | Tetrarooseveltite | Bi(AsO4) |
8.AD.60 | Chursinite | [Hg2]2+Hg2+2[AsO4]2 |
8.AD.65 | Clinobisvanite | Bi(VO4) |
8.AD.70 | Gurimite | Ba3(VO4)2 |
8.AD.75 | Picaite | NaCa[AsO3OH][AsO2(OH)2] |
Other Information
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 Cheralite
mindat.org URL:
https://www.mindat.org/min-6865.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
Mineral Dealers:
References for Cheralite
Localities for Cheralite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - 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.
All localities listed without proper references should be considered as questionable.
Argentina | |
| Bardelli et al. (2018) |
| M. B. FRANCHINI et al. (8300) +6 other references |
NUEVOS DATOS MINERALOGICOS DEL PROSPECTO DE ETRL (Nb) | |
Australia | |
| - (n.d.) +1 other reference |
| Mills et al. (2008) +1 other reference |
| Jacobson et al. (2007) |
Austria | |
| Kolitsch (2017) |
Kolitsch et al. (2010) | |
| Knobloch et al. (2021) |
| Taucher (1998) +1 other reference |
| Horninger (1936) +1 other reference |
Brazil | |
| Santos et al. (2018) |
| Waber (1991) |
| Baretto & Fujimori (1986) |
Canada | |
| Jennifer Pell (1994) |
| Berger et al. (2009) |
China | |
| Lin et al. (1995) |
| Wang Xianjue (1978) +1 other reference |
| Dai et al. (2015) |
Czech Republic | |
| PauliĆĄ P. et al. (Kutna Hora, issue 1) |
| PauliĆĄ P. et al. (Kutna Hora, issue 1) |
| PauliĆĄ P. et al. (Kutna Hora, issue 1) |
| PauliĆĄ P. et al. (Kutna Hora, issue 1) |
| René (2018) |
| Scharm +7 other references |
| ChlĂĄdek |
NovĂĄk | |
| PauliĆĄ P. et al. (Kutna Hora, issue 1) |
| PauliĆĄ P. et al. (Kutna Hora, issue 1) |
| PauliĆĄ P. et al. (Kutna Hora, issue 1) |
PauliĆĄ P. et al. (Kutna Hora, issue 1) | |
| KrmĂÄek et al. (2012) |
PauliĆĄ P. et al. (Kutna Hora, issue 1) | |
| ÄernĂœ P. |
PauliĆĄ P. et al. (Kutna Hora, issue 1) | |
www.cseg.ca/conferences/2000/556.PDF. +1 other reference | |
Egypt | |
| Abed et al. (2022) |
| Kamar et al. (2022, August) |
Europe | |
| PauliĆĄ P. et al. (Kutna Hora, issue 1) |
Finland | |
| Vartiainen |
Al-Ani et al. (2009) | |
| Ilkka Mikkola collection |
| Al-Ani et al. (2018) |
France | |
| Lheur C. et al. (2002) |
Germany | |
| Habel (2011) |
| Dill et al. (2008) |
| Schnorrer et al. (2003) |
| Blass |
| Witzke (2011) |
Greece | |
| www.researchgate.net (n.d.) +5 other references |
Hungary | |
| Harangi et al. (1993) +5 other references |
| KohĂșt et al. (2019) |
| SzakĂĄll & Gatter |
| SzakĂĄll et al. (2006) |
India (TL) | |
| Bowie S H U (1953) |
Italy | |
| Guastoni et al. (2007) +2 other references |
| Biagioni et al. (2013) |
Orlandi (1997) +2 other references | |
Laos | |
| Sutherland et al. (2002) +1 other reference |
Madagascar | |
| Sammer (2020) +1 other reference |
| Rakotondrazafy et al. (2008) |
Morocco | |
| Bea et al. (2013) |
| Khadem Allah (1993) |
Mozambique | |
| Moiana (2010) |
Moiana (2010) | |
Moiana (2010) | |
Moiana (2010) | |
Namibia (TL) | |
| Rose (1980) |
Norway | |
| Nordrum (2010) |
| Selbekk et al. (2009) |
| GrĂžnlie et al. (1969) |
| Kvamsdal et al. (2021) |
Poland | |
| Szuszkiewicz et al. (2013) +1 other reference |
| Matyszczak (2018) |
| Pieczka et al. (2013) +1 other reference |
| BudzyĆ et al. (2015) |
| Kucha et al. (1980) +1 other reference |
Romania | |
| Paulina HĂźrtopanu et al. (2017) |
| Hirtopanu et al. (2000) |
| Hirtopanu et al. (2013) |
Russia | |
| Bea et al. (2001) |
| Igor.V. Pekov (2008) |
Slovakia | |
| Ondrejka et al. (2020) |
| ChudĂk et al. (2009) |
| KodÄra (1986) |
South Africa | |
| Cairncross & Dixon (1995) |
Switzerland | |
| Stalder et al. (1998) |
Ukraine | |
| Poliakovska et al. (2023) |
| Dubyna O.V. et al. (2020) |
| Gurov et al. (2015) |
USA | |
| Rebecca A. Simmons (2009) |
| Castor et al. (2004) |
| FĂ€rber (n.d.) |
| Northrop et al. (1996) |
Northrop et al. (1996) | |
| Rocks and Minerals (1987) |
Hanson et al. (1999) | |
Minerals of the Stettin pluton et al. (2) | |
| Min. News 15 (5) |
| Dave Harris (location specified by dealer) +1 other reference |
| Van Rythoven et al. (2020) |
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Platt Pegmatite Mine, Big Creek pegmatite District, Carbon County, Wyoming, USA