Khristovite-(Ce)
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About Khristovite-(Ce)
Formula:
{CaCe}{MgAlMn2+}(Si2O7)(SiO4)F(OH)
In the type material, the F:O ratio on the O/F site is 63:37.
Colour:
Brown to dark brown.
Hardness:
5
Crystal System:
Monoclinic
Member of:
Name:
Named in honor of Yevgeny Vladimirovich Khristov (Евгения Владимировича Христова) (1933-), a Russian geologist, and the author of many works on the tectonics of the Tien Shan.
Chemically related to dissakisite-(Ce), dollaseite-(Ce), manaevite-(Ce), gatelite-(Ce), and västmanlandite-(Ce).
Classification of Khristovite-(Ce)
Approved
Approval year:
1991
8/C.23-85
9.BG.05
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
58.2.1a.9
58 : SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
2 : Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
58 : SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
2 : Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Physical Properties of Khristovite-(Ce)
Colour:
Brown to dark brown.
Hardness:
5 on Mohs scale
Optical Data of Khristovite-(Ce)
Type:
Biaxial (-)
RI values:
nα = 1.773 nβ = 1.790 nγ = 1.803
2V:
Measured: 83° , Calculated: 80°
Max Birefringence:
δ = 0.030

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:
r < v medium
Chemical Properties of Khristovite-(Ce)
Formula:
{CaCe}{MgAlMn2+}(Si2O7)(SiO4)F(OH)
In the type material, the F:O ratio on the O/F site is 63:37.
In the type material, the F:O ratio on the O/F site is 63:37.
IMA Formula:
CaCe(MgAlMn2+)[Si2O7][SiO4]F(OH)
Common Impurities:
Fe
Crystallography of Khristovite-(Ce)
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Cell Parameters:
a = 8.903(6) Å, b = 5.748(3) Å, c = 10.107(7) Å
β = 113.41(5)°
β = 113.41(5)°
Ratio:
a:b:c = 1.549 : 1 : 1.758
Unit Cell V:
4776 ų
Z:
2
Type Occurrence of Khristovite-(Ce)
Synonyms of Khristovite-(Ce)
Other Language Names for Khristovite-(Ce)
German:Khristovit-(Ce)
Russian:Христовит-(Ce)
Relationship of Khristovite-(Ce) to other Species
Member of:
Other Members of this group:
Dollaseite-(Ce) | {CaCe}{MgAlMg}(Si2O7)(SiO4)F(OH) | Mon. 2/m : P21/m |
UM2006-15-SiO:AlFHMgMnREE | {Mn2+Ce}{MgAlMn2+}(Si2O7)(SiO4)F(OH) |
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Nickel-Strunz Grouping
9.BG. | Shuiskite-(Cr) | Ca2Cr3+Cr3+2[Si2O6OH][SiO4](OH)2O | Mon. 2/m : B2/m |
9.BG. | Alnaperbøeite-(Ce) | Ca(Ce2.5Na0.5)(AlAl2Al)[Si2O7][SiO4]3O(OH)2 | Mon. 2/m : P21/m |
9.BG. | Magnesiovesuvianite | Ca19MgAl4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10](OH)(OH)9 | Tet. 4/m : P4/n |
9.BG. | Alumovesuvianite | Ca19AlAl4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 | 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)F(OH) | Mon. 2/m : P21/m |
9.BG.05a | Epidote | {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH) | Mon. 2/m : P21/m |
9.BG.05a | Hancockite | {CaPb}{Al2Fe3+}(Si2O7)(SiO4)O(OH) | Mon. |
9.BG.05a | Mukhinite | {Ca2}{Al2V3+}(Si2O7)(SiO4)O(OH) | Mon. |
9.BG.05a | 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.05a | 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.9.BG. | Ferriakasakaite-(La) | {CaLa}{Fe3+AlMn2+}(Si2O7)(SiO4)O(OH) | Mon. 2/m : P21/m |
9.BG.9.BG. | Ferriandrosite-(Ce) | {Mn2+Ce}{Fe3+AlMn2+}(SiO4)(Si2O7)O(OH) | |
9.BG.9.BG | Ferriperbøeite-(Ce) | CaCe3(Fe3+Al2Fe2+)[Si2O7][SiO4]3O(OH)2 | Mon. 2/m : P21/m |
9.BG.10 | Zoisite | Ca2Al3[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[Si2O6OH][SiO4](OH)2(OH) | Mon. |
9.BG.20 | Okhotskite | Ca2Mn2+Mn3+2[Si2O6OH][SiO4](OH)2(OH) | Mon. |
9.BG.20 | Pumpellyite-(Fe2+) | Ca2Fe2+Al2[Si2O6OH][SiO4](OH)2(OH) | Mon. |
9.BG.20 | Pumpellyite-(Fe3+) | Ca2Fe3+Al2[Si2O6OH][SiO4](OH)2O | Mon. |
9.BG.20 | Pumpellyite-(Mg) | Ca2MgAl2[Si2O6OH][SiO4](OH)2(OH) | Mon. |
9.BG.20 | Pumpellyite-(Mn2+) | Ca2Mn2+Al2[Si2O6OH][SiO4](OH)2(OH) | Mon. |
9.BG.20 | Shuiskite-(Mg) | Ca2MgCr3+2[Si2O6OH][SiO4](OH)2(OH) | Mon. |
9.BG.20 | Julgoldite-(Fe3+) | Ca2Fe3+Fe3+2[Si2O6OH][SiO4](OH)2O | Mon. |
9.BG.20 | Pumpellyite-(Al) | Ca2AlAl2[Si2O6OH][SiO4](OH)2O | Mon. |
9.BG.20 | Poppiite | Ca2V3+V3+2[Si2O6OH][SiO4](OH)2O | Mon. 2/m : B2/m |
9.BG.20 | Julgoldite-(Mg) | Ca2MgFe3+2[Si2O6OH][SiO4](OH)2(OH) | 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 | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 | Tet. 4/mmm (4/m 2/m 2/m) : P4/nnc |
9.BG.35 | Wiluite | Ca19MgAl4(Al,Mg)8(B,◻)4◻[Si2O7]4[(SiO4)10]O(O,OH)9 | Tet. 4/mmm (4/m 2/m 2/m) : P4/nnc |
9.BG.35 | Manganvesuvianite | Ca19Mn3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9 | Tet. 4/m : P4/n |
9.BG.35 | Fluorvesuvianite | Ca19Fe3+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(F,OH)9 | Tet. 4/mmm (4/m 2/m 2/m) |
9.BG.35 | Cyprine | Ca19Cu2+Al4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10](OH)(OH)9 | Tet. 4/m : P4/n |
9.BG.40 | Vyuntspakhkite-(Y) | (Y,Yb)4Al2.5-1.5(Si,Al)1.5-2.5(SiO4)4O(OH)7 | Mon. |
9.BG.45 | Dellaite | Ca6Si3O11(OH)2 | Tric. |
9.BG.50 | Gatelite-(Ce) | CaCe3(AlAl2Mg)[Si2O7][SiO4]3O(OH)2 | Mon. 2/m : P21/b |
9.BG.55 | Västmanlandite-(Ce) | CaCe3(MgAl2Mg)[Si2O7][SiO4]3F(OH)2 | Mon. 2/m : P21/m |
Related Minerals - Dana Grouping (8th Ed.)
58.2.1a.1 | Allanite-(Ce) | {CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH) | Mon. 2/m : P21/m |
58.2.1a.2 | Allanite-(La) | {CaLa}{Al2Fe2+}(Si2O7)(SiO4)O(OH) | Mon. 2/m : P21/m |
58.2.1a.3 | Allanite-(Y) | {CaY}{Al2Fe2+}(Si2O7)(SiO4)O(OH) | Mon. |
58.2.1a.4 | Clinozoisite | {Ca2}{Al3}(Si2O7)(SiO4)O(OH) | Mon. 2/m : P21/m |
58.2.1a.5 | Dissakisite-(Ce) | {CaCe}{Al2Mg}(Si2O7)(SiO4)O(OH) | Mon. 2/m : P21/m |
58.2.1a.6 | Dollaseite-(Ce) | {CaCe}{MgAlMg}(Si2O7)(SiO4)F(OH) | Mon. 2/m : P21/m |
58.2.1a.7 | Epidote | {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH) | Mon. 2/m : P21/m |
58.2.1a.8 | Hancockite | {CaPb}{Al2Fe3+}(Si2O7)(SiO4)O(OH) | Mon. |
58.2.1a.10 | Mukhinite | {Ca2}{Al2V3+}(Si2O7)(SiO4)O(OH) | Mon. |
58.2.1a.11 | Piemontite | {Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH) | Mon. 2/m : P21/m |
58.2.1a.12 | Piemontite-(Sr) | {CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH) | Mon. |
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 Khristovite-(Ce)
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Pautov, L.A., Khorov, P.V., Ignatenko, K.I., Sokolova, E.V., and Nadezhina, T.N. (1993) Khristovite-(Ce), (Ca,REE)REE(Mg,Fe)AlMnSi3O11(OH)(F,O), a new mineral of the epidote group. Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 122(3): 103-111 (in Russian). [Abs. in American Mineralogist (1995): 80: 405.]
Sokolova, E.V., Nadezhina, T.N., and Pautov, L.A. (1991) Crystal structure of a new natural silicate of manganese from the epidote group. Soviet Physics – Crystallography: 36(2): 172-174.
New Minerals (1997), New Minerals 1990-1994.
Internet Links for Khristovite-(Ce)
mindat.org URL:
https://www.mindat.org/min-2200.html
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External Links:
Mineral Dealers:
Localities for Khristovite-(Ce)
Locality List




All localities listed without proper references should be considered as questionable.
Kyrgyzstan (TL) | |
| ZVMO,(1993) 122, n3, 103-111; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow |
Namibia | |
| Irene M. Abraham (2009): Geology and spatial distribution of uranium mineralisation in the SK anomaly area, Rossing area, Namibia, Master thesis University of the Witwatersrand. |
Rhodonite occurrence, Muzeinyi Valley, Inyl'chek Range, Issyk-Kul Region, Kyrgyzstan