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Seidite-(Ce)

A valid IMA mineral species
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Na4(Ce,Sr)2[TiSi8O18(OH)2](O,OH,F)4 · 5H2O
Colour:
Bright yellow, pinkish yellow, creamy-white
Lustre:
Silky
Hardness:
3 - 4
Specific Gravity:
2.76
Crystal System:
Monoclinic
Name:
Named after Seidozero, literally Lake Seid, the central lake in the Lovozero complex.
Type Locality:
ⓘYubileinaya pegmatite, Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia
This page provides mineralogical data about Seidite-(Ce).


Unique Identifiers
IMA Formula:
Na4(Ce,Sr)2TiSi8O18(O,OH,F)6 · 5H2O
Approval year:
1993
First published:
1998
Type description reference:
Khomyakov, A. P., Ferraris, G., Belluso, E., Britvin, S. N., Nechelyustov, G. N., Soboleva, S. V. (1998) Seidite-(Ce), Na4SrCeTiSi8O22F·5H2O, a new mineral with zeolitic properties.Zapiski Vserossijskogo Mineralogicheskogo Obshchestva, 127 (4) 94-100

Classification of Seidite-(Ce)

Mineral Symbols
Transparency:
Translucent
Comment:
Resinous or dull in some specimens
Colour:
Bright yellow, pinkish yellow, creamy-white
Hardness:
3 - 4 onMohs scale
Cleavage:
Perfect
Perfect {100} and less perfect {001}
Fracture:
Splintery, Fibrous
Density:
2.76 g/cm3 (Measured)    2.73 g/cm3 (Calculated)

Optical Data of Seidite-(Ce)
Surface Relief:
Low
Dispersion:
weak
Comments:
positive elongation, X ≈ a, Y ≈ c, Z ≈ b.

Chemistry of Seidite-(Ce)

Crystallography of Seidite-(Ce)
General Appearance of Type Material:
Bright yellow, pinkish yellow, or cream-colored spherulites to 1 cm, in cavernous natrolite.
Place of Conservation of Type Material:
Museum of the St. Petersburg Mining Institute, Russia.
Geological Setting of Type Material:
Ultraagpaitic pegmatite.
Associated Minerals at Type Locality:
Belovite-(Ce)LeucospheniteManganoneptuniteSazhinite-(Ce)Serandite
SphaleriteSteenstrupine-(Ce)
Reference:
Khomyakov, A.P., Ferraris, G., Belluso, E., Britvin, S.N., Nechelyustov, G.N., Soboleva, S.V. (1998) Seidite-(Ce), Na4SrCeTiSi8O22F·5H2O, a new mineral with zeolitic properties. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva: 127(4): 94-100.
Download:
https://rruff.info/rruff_1.0/uploads/ZVMO127N4_94.pdf

Synonyms of Seidite-(Ce)

Other Language Names for Seidite-(Ce)

Common AssociatesTet. 4/m :I4/m9.DJ.10Laplandite-(Ce)Na4CeTiPO4Si7O18 · 5H2OOrth.mmm(2/m2/m2/m) :Pmmm9.DJ.15Caysichite-(Y)(Ca,Yb,Er)4Y4(Si8O20)(CO3)6(OH) · 7H2OOrth.mm29.DJ.25Carlosturanite(Mg,Fe,Ti)21(Si,Al)12O28(OH)34 · H2OMon.m :Bm9.DJ.30JonesiteBa4(K,Na)2Ti4Al2(Si3O9)2(SiO4)4O2 · 6H2OMon. 2/m :P2/m

Fluorescence of Seidite-(Ce)

Other Information
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    • References for Seidite-(Ce)ⓘKhibiny Massif ...Kasatkin (2019)Mandarino (1996)+2 other references
    USA
     
    Henry Barwood - unpublished (2010)
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