Gatelite-(Ce)
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Pierre Gatel
Formula:
CaCe3Al2(Al,Mg)(Mg,Fe2+,Al)(Si2O7)(SiO4)3(O,F)(OH,O)2
Colour:
colourless
Hardness:
6 - 7
Specific Gravity:
4.51 (Calculated)
Crystal System:
Monoclinic
Member of:
Name:
For Pierre Gatel, founder president of the Association Française de Microminéralogie (AFM).
Type Locality:
Gatelite-(Ce) can be regarded as a ET polisome within a polysomatic series having epidote and törnebohmite as end-members.
Classification of Gatelite-(Ce)
Approved
Approval Year:
2001
8/C.24-100
9.BG.50
9 : SILICATES (Germanates)
B : Sorosilicates
G : Sorosilicates with mixed SiO4 and Si2O7 groups; cations in octahedral [6] and greater coordination
9 : SILICATES (Germanates)
B : Sorosilicates
G : Sorosilicates with mixed SiO4 and Si2O7 groups; cations in octahedral [6] and greater coordination
Physical Properties of Gatelite-(Ce)
Transparency:
Transparent
Colour:
colourless
Hardness:
6 - 7 on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
on {100}
on {100}
Fracture:
Irregular/Uneven
Density:
4.51 g/cm3 (Calculated)
Chemical Properties of Gatelite-(Ce)
Formula:
CaCe3Al2(Al,Mg)(Mg,Fe2+,Al)(Si2O7)(SiO4)3(O,F)(OH,O)2
IMA Formula:
(Ca,Ce)4(Al,Mg,Fe)4(Si2O7)(SiO4)3(O,F,OH)3
Common Impurities:
REE,Nb
Crystallography of Gatelite-(Ce)
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Cell Parameters:
a = 17.77 Å, b = 5.651 Å, c = 17.458 Å
β = 116.18°
β = 116.18°
Ratio:
a:b:c = 3.145 : 1 : 3.089
Unit Cell V:
1573.3 ų
Z:
4
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 15.67 | (87) |
| 3.49 | (50) |
| 2.97 | (100) |
| 2.83 | (44) |
| 2.61 | (56) |
Type Occurrence of Gatelite-(Ce)
General Appearance of Type Material:
striated crystals, finely intergrown with minute lamellae of törnebohmite-(Ce)
Geological Setting of Type Material:
Talc deposit
Associated Minerals at Type Locality:
Synonyms of Gatelite-(Ce)
Other Language Names for Gatelite-(Ce)
Russian:Гателит-(Ce)
Relationship of Gatelite-(Ce) to other Species
Member of:
Other Members of this group:
| Alnaperbøeite-(Ce) | (CaCe2.5Na0.5)(Al4)(Si2O7)(SiO4)3O(OH)2 | Mon. 2/m : P21/m |
| Ferriperbøeite-(Ce) | (CaCe3)(Fe3+Al2Fe2+)(Si2O7)(SiO4)3O(OH)2 | Mon. 2/m : P21/m |
| Perbøeite-(Ce) | (CaCe3)(Al3Fe2+)(Si2O7)(SiO4)3O(OH)2 | Mon. 2/m : P21/m |
| UM2007-35-SiO:AlCaFFeMgREE | Ca(Ce,La)3Al2Fe2+2(Si2O7)(SiO4)3(OH)2F | |
| Västmanlandite-(Ce) | Ce3CaMg2Al2Si2O15(OH)2F | Mon. 2/m : P21/m |
Related Minerals - Nickel-Strunz Grouping
| 9.BG.X | Cyprine | Ca19Cu2+(Al10Mg2)Si18O68(OH)10 | Tet. 4/m : P4/n |
| 9.BG.05b | Allanite-(Ce) | {CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH) | Mon. 2/m : P21/m |
| 9.BG.05b | Allanite-(La) | {CaLa}{Al2Fe2+}(Si2O7)(SiO4)O(OH) | Mon. 2/m : P21/m |
| 9.BG.05b | Allanite-(Y) | {CaY}{Al2Fe2+}(Si2O7)(SiO4)O(OH) | Mon. |
| 9.BG.05a | Clinozoisite | {Ca2}{Al3}(Si2O7)(SiO4)O(OH) | Mon. 2/m : P21/m |
| 9.BG.05b | Dissakisite-(Ce) | {CaCe}{Al2Mg}(Si2O7)(SiO4)O(OH) | Mon. 2/m : P21/m |
| 9.BG.05 | Dollaseite-(Ce) | {CaCe}{MgAlMg}(Si2O7)(SiO4)(OH)F | Mon. 2/m : P21/m |
| 9.BG.05a | Epidote | {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH) | Mon. 2/m : P21/m |
| 9.BG.05 | Hancockite | {CaPb}{Al2Fe3+}(Si2O7)(SiO4)O(OH) | Mon. |
| 9.BG.05 | Khristovite-(Ce) | {CaCe}{MgAlMn2+}(Si2O7)(SiO4)(OH)F | Mon. 2/m : P21/m |
| 9.BG.05 | Mukhinite | {Ca2}{Al2V3+}(Si2O7)(SiO4)O(OH) | Mon. |
| 9.BG.05 | Piemontite | {Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH) | Mon. 2/m : P21/m |
| 9.BG.05 | Piemontite-(Sr) | {CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH) | Mon. |
| 9.BG.05b | Manganiandrosite-(La) | {Mn2+La}{Mn3+AlMn2+}(Si2O7)(SiO4)O(OH) | Mon. |
| 9.BG.05 | Tawmawite | {Ca2}{(Al,Fe3+,Cr)3}(Si2O7)(SiO4)O(OH) | |
| 9.BG.05 | Tweddillite | {CaSr}{Mn3+AlMn3+}(Si2O7)(SiO4)O(OH) | Mon. 2/m : P21/m |
| 9.BG.05b | Ferriallanite-(Ce) | {CaCe}{Fe3+AlFe2+}(Si2O7)(SiO4)O(OH) | Mon. 2/m : P21/m |
| 9.BG.05 | Niigataite | {CaSr}{Al3}(Si2O7)(SiO4)O(OH) | Mon. 2/m |
| 9.BG.05 | Manganiandrosite-(Ce) | {Mn2+Ce}{Mn3+AlMn2+}(Si2O7)(SiO4)O(OH) | Mon. 2/m : P21/m |
| 9.BG.05 | Dissakisite-(La) | {CaLa}{Al2Mg}(Si2O7)(SiO4)O(OH) | Mon. 2/m : P21/m |
| 9.BG.05 | Vanadoandrosite-(Ce) | {Mn2+Ce}{V3+AlMn2+}(Si2O7)(SiO4)O(OH) | Mon. 2/m : P21/m |
| 9.BG.05 | Uedaite-(Ce) | {Mn2+Ce}{Al2Fe2+}(Si2O7)(SiO4)O(OH) | Mon. 2/m : P21/m |
| 9.BG.05 | Epidote-(Sr) | {CaSr}{Al2Fe3+}(Si2O7)(SiO4)O(OH) | Mon. 2/m : P21/m |
| 9.BG.05b | Allanite-(Nd) | {CaNd}{Al2Fe2+}(Si2O7)(SiO4)O(OH) | Mon. 2/m : P21/m |
| 9.BG.05b | Ferriallanite-(La) | {CaLa}{Fe3+AlFe2+}(Si2O7)(SiO4)O(OH) | Mon. 2/m : P21/m |
| 9.BG.05b | Åskagenite-(Nd) | {Mn2+Nd}{Al2Fe3+}(Si2O7)(SiO4)O2 | Mon. 2/m : P21/m |
| 9.BG.10 | Zoisite | {Ca2}{Al3}(Si2O7)(SiO4)O(OH) | Orth. mmm (2/m 2/m 2/m) : Pnma |
| 9.BG.15 | Macfallite | Ca2Mn3+3(SiO4)(Si2O7)(OH)3 | Mon. |
| 9.BG.15 | Sursassite | Mn2+2Al3(SiO4)(Si2O7)(OH)3 | Mon. 2/m : P21/m |
| 9.BG.20 | Julgoldite-(Fe2+) | Ca2Fe2+Fe3+2(Si2O7)(SiO4)(OH)2 · H2O | Mon. |
| 9.BG.20 | Okhotskite | Ca2(Mn,Mg)(Mn3+,Al,Fe3+)2(Si2O7)(SiO4)(OH)2 · H2O | Mon. |
| 9.BG.20 | Pumpellyite-(Fe2+) | Ca2Fe2+Al2(Si2O7)(SiO4)(OH)2 · H2O | Mon. |
| 9.BG.20 | Pumpellyite-(Fe3+) | Ca2(Fe3+,Mg)(Al,Fe3+)2(Si2O7)(SiO4)(OH,O)2 · H2O | Mon. |
| 9.BG.20 | Pumpellyite-(Mg) | Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O | Mon. |
| 9.BG.20 | Pumpellyite-(Mn2+) | Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2O | Mon. |
| 9.BG.20 | Shuiskite | Ca2MgCr2(Si2O7)(SiO4)(OH)2 · 2H2O | Mon. |
| 9.BG.20 | Julgoldite-(Fe3+) | Ca2Fe3+Fe3+2(Si2O7)(SiO4)O(OH) · H2O | Mon. |
| 9.BG.20 | Pumpellyite-(Al) | Ca2Al3(Si2O7)(SiO4)(OH,O)2 · H2O | Mon. |
| 9.BG.20 | Poppiite | Ca2(V3+,Fe3+,Mg)(V3+,Al)2(Si2O7)(SiO4)(OH,O)2 · H2O | Mon. 2/m : B2/m |
| 9.BG.20 | Julgoldite-(Mg) | Ca2MgFe3+2(Si2O7)(SiO4)(OH)2 · H2O | Mon. |
| 9.BG.25 | Ganomalite | Pb9Ca5Mn(Si2O7)4(SiO4)O | Hex. |
| 9.BG.30 | Rustumite | Ca10(Si2O7)2(SiO4)(OH)2Cl2 | Mon. |
| 9.BG.35 | Vesuvianite | (Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10 | Tet. |
| 9.BG.35 | Wiluite | Ca19(Al,Mg)13(B,☐,Al)5(Si2O7)4(SiO4)10(O,OH)10 | Tet. 4/mmm (4/m 2/m 2/m) : P4/nnc |
| 9.BG.35 | Manganvesuvianite | Ca19Mn3+(Al,Mn3+,Fe3+)10(Mg,Mn2+)2(Si2O7)4(SiO4)10O(OH)9 | Tet. 4/m : P4/n |
| 9.BG.35 | Fluorvesuvianite | Ca19(Al,Mg,Fe2+)13(Si2O7)4(SiO4)10O(F,OH)9 | Tet. 4/mmm (4/m 2/m 2/m) |
| 9.BG.40 | Vyuntspakhkite-(Y) | (Y,Yb)4Al2.5-1.5(Si,Al)1.5-2.5(SiO4)4O(OH)7 | |
| 9.BG.45 | Dellaite | Ca6Si3O11(OH)2 | Tric. |
| 9.BG.55 | Västmanlandite-(Ce) | Ce3CaMg2Al2Si2O15(OH)2F | Mon. 2/m : P21/m |
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.
References for Gatelite-(Ce)
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Mineralogy (2003): 88: 223-228.
Internet Links for Gatelite-(Ce)
mindat.org URL:
https://www.mindat.org/min-27350.html
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External Links:
Mineral Dealers:
Localities for Gatelite-(Ce)
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The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
France (TL) | |
| Am. Min. 88:223-228 (2003) |
Sweden | |
| Steffen Möckel probed (EDX 29/08/2005) - M.E. Ciriotti collection |
Trimouns Talc Mine, Luzenac, Ariège, Occitanie, France