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UM2006-09-O:CaFeMnREESrTiZr

Valid as an unnamed mineral
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Discuss UM2006-09-O:CaFeMnREESrTiZr
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Formula:
(Ce,Sr,REE)(Ca,Mn,Zr)Fe2(Ti,Fe)18O38
originally given as (REE,Sr)(Ca,Mn,Zr)(Ti,Fe)18Fe2O38 but Ce is dominant
Co-described with other unnamed group members:UM2006-05-O:CaFeKMnNaREESrTiZr,UM2006-06-O:CaFeKMnNaREESrTiZr,UM2006-07-O:CaFeKMnNaREESrTiZr, andUM2006-08-O:CaFeKMnNaREESrTiZr.

The Ca analogue ofdavidite-(Ce) andUM2006-07-O:CaFeKMnNaREESrTiZr (not considering the Fe valency).

Chemistry comparable, e.g., with that ofchristofschäferite-(Ce) (which, however, is a silicate and not an oxide).

Note on the locality: "fenitized megaxenolith" within the Khibiny pluton; although the precise localization is not reported, it is almost undoubtedly the Kaskasnyunchorr site based on the listed, very characteristic, associates.

EPMA data for the whole group of unnamed species [wt.%; mean (range)]:

TiO2 68.39 (64.66-73.28)
ZrO2 2.55 (0.74-4.71)
FeO 17.53 (15.49-19.15)
MnO 1.43 (0.28-2.23)
MgO 0.47 (n.d.-0.78)
ZnO 0.12 (n.d.-0.36)
Cr2O3 0.52 (0.25-1.87)
SrO 2.49 (n.d.-4.28)
CaO 1.58 (0.90-2.53)
BaO n.d. (n.d.-0.28)
NiO n.d. (n.d.-1.56)
V2O3 0.46 (0.32-0.60)
Ce2O3 0.98 (n.d.-3.99)
La2O3 0.80 (n.d.-0.35)
Pr2O3 n.d. (n.d.-0.40)
Y2O3 n.d.
Nb2O5 0.42 (0.12-1.06)
ThO2 0.13 (n.d.-0.99)

total 98.89

atoms per formula unit (38 oxygen atoms basis):

Ti 14.81-15.65
Zr 0.11-0.66
Fe 3.86-4.76
Mn 0.07-0.56
Mg 0-0.34
Zn 0-0.08
Cr 0.06-0.45
Sr 0-0.75
Ca 0.29-0.80
Ni 0-0.02
Pb 0-0.04
K 0-0.11
Na 0-0.87
V 0.08-0.14
Ce 0-0.43
La 0-0.36
Nd 0-0.06
Nd 0-0.06
Sm <0.05
Pr <0.05
Nb 0-0.14
Th 0-0.07


Relationship of UM2006-09-O:CaFeMnREESrTiZr to other Species
Other Members of this group:

AlmeidaitePbZn2(Mn,Y)(Ti,Fe3+)18O37(OH,O)Trig.3 :R3
BotuobinskiteSrFe2+Mg2(Cr3+6Ti4+12)[O36(OH)2]Trig.3 :R3
Cleusonite(Pb,Sr)(U4+,U6+)(Fe2+,Zn)2(Ti,Fe2+,Fe3+)18(O,OH)38Trig. 3 :R3
CrichtoniteSr(Mn,Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH)38Trig.3 :R3
Davidite-(Ce)Ce(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38Trig.3 :R3
Davidite-(La)La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38Trig.3 :R3
Davidite-(Y)(La,Ce,Na,Ca,Pb)(Y,Fe2+,◻)(Fe2+,Mn2+)2(Ti,Fe3+,Nb,Zr)18O38 (hypothetical)Trig.
Dessauite-(Y)(Sr,Pb)(Y,U)(Ti,Fe3+)20O38Trig.3 :R3
Gramaccioliite-(Y)(Pb,Sr)(Y,Mn)Fe3+2(Ti,Fe3+)18O38Trig.3 :R3
Haitaite-(La)LaU4+Fe3+2(Ti13Fe2+4Fe3+)O38Trig.3 :R3
LandauiteNaMnZn2(Ti,Fe)6Ti12O38Trig.3 :R3
Lindsleyite(Ba,Sr)(Zr,Ca)(Fe,Mg)2(Ti,Cr,Fe)18O38Trig.
Loveringite(Ca,Ce,La)(Zr,Fe)(Mg,Fe)2(Ti,Fe,Cr,Al)18O38Trig.3 :R3
Mapiquiroite(Sr,Pb)(U,Y)Fe2(Ti,Fe3+,Cr3+)18O38Trig.3 :R3
Mathiasite(Mg,Cr,Fe,Ca,K)2(Ti,Zr,Cr,Fe)5O12Trig.3 :R3
Mianningite(◻,Pb,Ce,Na)(U4+,Mn,U6+)Fe3+2 (Ti,Fe3+)18O38Trig.3 :R3
MirnyiteSrZr4+Mg2(Cr3+6Ti4+12)O38Trig.3 :R3
PaseroitePbMn2+(Mn2+,Fe3+)2(V5+,Ti,◻)18O38Trig.3 :R3
SaranovskiteSrCaFe2+2(Cr4Ti2)Ti12O38Trig.3 :R3
SenaitePb(Mn,Y,U)(Fe,Zn)2(Ti,Fe,Cr,V)18(O,OH)38Trig.3 :R3
UM1987-03-O:FePbTiU~(U,Pb)(Ti,Fe3+,Fe2+,Mn)21O38Trig.3 :R3
UM2003-08-O:AlCaFeREEScTiV(Ca,Ce)Sc(Ti,V,Fe,Al)20O38
UM2006-05-O:CaFeKMnNaREESrTiZr(Sr,Na,K,REE)(Ca,Zr,Mn)(Ti,Fe)18Fe2O38
UM2006-06-O:CaFeKMnNaREESrTiZr(Sr,Na,K,REE)(Zr,Ca,Mn)(Ti,Fe)18Fe2O38
UM2006-07-O:CaFeKMnNaREESrTiZr(Na,Sr,K,REE)(Ca,Zr,Mn)(Ti,Fe)18Fe2O38
UM2006-08-O:CaFeKMnNaREESrTiZr(Na,Sr,K,REE)(Zr,Ca,Mn)(Ti,Fe)18Fe2O38
Unnamed (HBU UK-4)NaFe2+Zn2(Ti,Fe3+,Nb)6Ti12O38Trig.3 :R3

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    • References for UM2006-09-O:CaFeMnREESrTiZrⓘKaskasnyunchorr MountainBarkov et al. (2006)+1 other reference

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