Seidozerite Mineral Data
General Seidozerite Information
Chemical Formula:
(Na,Ca)2(Zr,Ti,Mn)2Si2O7(O,F)2
Composition:
Molecular Weight = 368.38 gm
Sodium 11.23 % Na 15.14 % Na2 O
Calcium 2.18 % Ca 3.04 % CaO
Magnesium 1.32 % Mg 2.19 % MgO
Zirconium 17.33 % Zr 23.42 % ZrO2
Titanium 7.80 % Ti 13.01 % TiO2
Manganese 2.98 % Mn 3.85 % MnO
Aluminum 0.73 % Al 1.38 % Al2 O3
Iron 1.52 % Fe 2.17 % Fe2 O3
Silicon 15.25 % Si 32.62 % SiO2
Oxygen 36.05 % O
Fluorine 3.61 % F 3.61 % F
- %
F -1.52 % -O=F2
______ ______
100.00 % 98.91 % = TOTAL OXIDE
Empirical Formula:
Na1.8 Ca0.2 Zr0.7 Ti0.6 Mn2+ 0.2 Mg0.2 Fe3+ 0.1 Al0.1 (Si2 O7 )O1.3 F0.7
Environment:
Thin veins in nepheline syenite pegmatites.
IMA Status:
Valid Species (Pre-IMA) 1958
Locality:
Lovozero massif, near the Muruai and Uel'kuai Rivers, Seidozero region, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Name Origin:
Named after the locality.
Name Pronunciation:
Seidozerite + Pronunciation
Synonym:
ICSD 22334
PDF 14-447
Seidozerite Image
Images:
Seidozerite Crystallography
Axial Ratios:
a:b:c =0.7788:1:2.5774
Cell Dimensions:
a = 5.53, b = 7.1, c = 18.3, Z = 4; beta = 102.7° V = 700.93 Den(Calc)= 3.49
Crystal System:
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2/c
X Ray Diffraction:
By Intensity(I/Io ): 2.97(1), 1.83(0.7), 2.87(0.7),
Physical Properties of Seidozerite
Cleavage:
{001} Perfect
Color:
Brownish red, Reddish yellow.
Density:
3.472
Diaphaneity:
Translucent
Fracture:
Brittle - Generally displayed by glasses and most non-metallic minerals.
Habit:
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Hardness:
4-5 - Fluorite-Apatite
Luster:
Vitreous (Glassy)
Optical Properties of Seidozerite
Gladstone-Dale:
CI meas = 0.021 (Excellent) - where the CI = (1-KPDmeas /KC ) CI calc = 0.026 (Excellent) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.2209,KPDmeas = 0.2221,KC = 0.2269 Ncalc = 1.79
Optical Data:
Biaxial (+), a=1.725, b=1.758, g=1.83, bire=0.1050, 2V(Calc)=72, 2V(Meas)=68.
Pleochroism (x):
dark red.
Pleochroism (y):
red.
Pleochroism (z):
light yellow.
Calculated Properties of Seidozerite
Electron Density:
Bulk Density (Electron Density)=3.34 gm/cc note: Specific Gravity of Seidozerite =3.47 gm/cc.
Fermion Index:
Fermion Index = 0.03 Boson Index = 0.97
Photoelectric:
PESeidozerite = 26.83 barns/electronU=PESeidozerite x r Electron Density= 89.52 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Seidozerite is Not Radioactive
Seidozerite Classification
Dana Class:
56.02.06a.01 (56) Sorosilicate Si2O7 Groups and O, OH, F. and H2O
(56.02) with cations in [4] and/or >[4] coordination
(56.02.06a) Seidozerite - Lamprophyllite group
56.02.06a.01 Seidozerite (Na,Ca)2(Zr,Ti,Mn)2Si2O7(O,F)2 P 2/c 2/m
56.02.06a.02 Normandite ! NaCa(Mn,Fe)(Ti,Nb,Zr)Si2O7(O,F)2 P 21 /a 2/m
56.02.06a.03 Grenmarite ! (Zr,Mn)2(Zr,Ti)(Mn,Na)(Na,Ca)4(Si2O7)2(O,F)4 P 2/c 2/m
Strunz Class:
09.BE.25 09 - SILICATES (Germanates)
09.B - Sorosilicates
09.BE -Si2O7 groups with additional anions;
09.BE.25 Barytolamprophyllite Ba2Na3(Fe,Ti)3(Si2O7)2(O,OH,F)4 C 2/m 2/m
09.BE.25 Ericssonite BaMn2FeO[Si2O7](OH) C 2/m 2/m
09.BE.25 Lamprophyllite Na2(Sr,Ba)2Ti3(SiO4)4(OH,F)2 C 2/m 2/m
09.BE.25 Orthoericssonite BaMn2(FeO)Si2O7(OH) Pmmn 2/m 2/m 2/m
09.BE.25 Seidozerite (Na,Ca)2(Zr,Ti,Mn)2Si2O7(O,F)2 P 2/c 2/m
09.BE.25 Nabalamprophyllite ! Ba(Na,Ba){Na3Ti[Ti2O2Si4O14](OH,F)2} P 2/m 2/m
09.BE.25 Grenmarite ! (Zr,Mn)2(Zr,Ti)(Mn,Na)(Na,Ca)4(Si2O7)2(O,F)4 P 2/c 2/m
Other Seidozerite Information
References:
NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2)
See Also:
Links to other databases for Seidozerite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST
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Seidozerite
(Na,Ca)2(Zr,Ti,Mn)2Si2O7(O,F)2
Dana No: 56.02.06a.01 Strunz No: 09.BE.25
Locality:
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