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Christofschäferite-(Ce)

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About Christofschäferite-(Ce)Hide

Formula:
Ce3CaMnTiFe(3+)Ti2(Si2O7)2O8
Colour:
black
Lustre:
Resinous
Hardness:
6
Specific Gravity:
4,8(1)
Crystal System:
Monoclinic
Name:
Named after Christof Schäfer (b. 1961), amateur mineralogist of Mayen-Kürrenberg, specialist in the minerals of the Eifel volcanic area, who discovered the mineral.
Mn2+-dominant member of the chevkinite group.



Classification of Christofschäferite-(Ce)Hide

Approved
Approval Year:
2012

Physical Properties of Christofschäferite-(Ce)Hide

Resinous
Transparency:
Translucent
Colour:
black
Streak:
brown
Hardness:
Hardness Data:
Mohs hardness reference species
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Conchoidal
Density:
4,8(1) g/cm3 (Measured)    4,85 g/cm3 (Calculated)

Optical Data of Christofschäferite-(Ce)Hide

Type:
Biaxial (-)
RI values:
nα = 1.945 nβ = 2.015 nγ = 2.050
2V:
Measured: 70° , Calculated: 68°
Max Birefringence:
δ = 0.105
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
none observed
Pleochroism:
Strong

Chemical Properties of Christofschäferite-(Ce)Hide

Formula:
Ce3CaMnTiFe(3+)Ti2(Si2O7)2O8
IMA Formula:
(Ce,La,Ca)4Mn(Ti,Fe)3(Fe,Ti)(Si2O7)2O8
Common Impurities:
Al,Mg,Ca,Nb

Crystallography of Christofschäferite-(Ce)Hide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Setting:
P21/m
Cell Parameters:
a = 13.3722(4) Å, b = 5.7434(1) Å, c = 11.0862(2) Å
β = 100.580(2)°
Ratio:
a:b:c = 2.328 : 1 : 1.93
Unit Cell V:
836.97 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.90 Å(39)
4.64 Å(65)
3.480 Å(78)
3.169 Å(81)
3.095 Å(43)
2.730 Å(100)
2.169 Å(46)
1.737 Å(46)

Type Occurrence of Christofschäferite-(Ce)Hide

General Appearance of Type Material:
coarse crystals and isolated anhedral grains
Place of Conservation of Type Material:
Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia, registration number 4227/1
Geological Setting of Type Material:
Metasomatite, that formed at the contact of an alkali-rich magma and a Mn-rich rock

Synonyms of Christofschäferite-(Ce)Hide

Relationship of Christofschäferite-(Ce) to other SpeciesHide

Other Members of this group:
Chevkinite-(Ce)(Ce,La,Ca,Th)4(Fe2+,Mg)(Fe2+,Ti,Fe3+)2(Ti,Fe3+)2(Si2O7)2O8Mon. 2/m : P21/b
Chevkinite-(Nd)(Nd,REE)4(Fe2+,Mg)(Fe2+,Ti,Fe3+)2(Ti,Fe3+)2(Si2O7)2O8 ?
Delhuyarite-(Ce)Ce4Mg(Fe3+,W)3□(Si2O7)2O6(OH)2Mon. 2/m : B2/m
Dingdaohengite-(Ce)(Ce,La)4Fe2+(Ti,Fe2+,Mg,Fe2+)2Ti2(Si2O7)2O8Mon. 2/m : P21/b
Maoniupingite-(Ce)(Ce,Ca)4(Fe3+,Ti,Fe2+,◻)(Ti,Fe3+,Fe2+,Nb)4(Si2O7)2O8Mon. 2/m : B2/m
Polyakovite-(Ce)(Ce,Ca)4(Mg,Fe2+)(Cr3+,Fe3+)2(Ti,Nb)2(Si2O7)2O8Mon. 2/m : B2/m

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Christofschäferite-(Ce) associated with SanidineK(AlSi3O8)
1 photo of Christofschäferite-(Ce) associated with RhodoniteMn2+SiO3

Other InformationHide

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 Christofschäferite-(Ce)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Chukanov, N.V., Aksenov, S.M., Rastsvetaeva, R.K., Belakovskiy, D.I., Göttlicher, J., Britvin, S.N., Van, K.V. (2012) Christofschäferite-(Ce), IMA 2011-107. CNMNC Newsletter No. 13, June 2012, page 810; Mineralogical Magazine, 76, 807-817.
Aksenov, S.M., Rastsvetaeva, R.K., Chukanov, N.V.(2012): Crystal structure features of Christofschäferite-(Ce) a new mineral of chevkinite-group, ECM 2012, Norway.
Chukanov, N.V., Aksenov, S.M., Rastsvetaeva, R.K., Belakovskiy, D.I., Göttlicher, J., Britvin, S.N., Möckel, S. (2012) Christofschäferite (Ce), (Ce,La,Ca)4Mn2+(Ti,Fe3+)3(Fe3+,Fe2+,Ti)(Si2O7)2O8, a new chevkinite group mineral from the Eifel area, Germany. [Novye dannye o mineralakh] New Data on Minerals, 47, 33-42.

Internet Links for Christofschäferite-(Ce)Hide

Localities for Christofschäferite-(Ce)Hide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- 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). 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Germany (TL)
 
  • Rhineland-Palatinate
    • Mayen-Koblenz
      • Mendig
        • Wingertsberg
Chukanov, N.V., Aksenov, S.M., Rastsvetaeva, R.K., Belakovskiy, D.I., Göttlicher, J., Britvin, S.N., Van, K.V. (2012) Christofschäferite-(Ce), IMA 2011-107. CNMNC Newsletter No. 13, June 2012, page 810; Mineralogical Magazine, 76, 807-817; Chukanov, N.V., Aksenov, S.M., Rastsvetaeva, R.K., Belakovskiy, D.I., Göttlicher, J., Britvin, S.N., Möckel, S. (2012) Christofschäferite (Ce), (Ce,La,Ca)4Mn2+(Ti,Fe3+)3(Fe3+,Fe2+,Ti)(Si2O7)2O8, a new chevkinite group mineral from the Eifel area, Germany. [Novye dannye o mineralakh] New Data on Minerals, 47, 33-42.
 
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