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 % Na₂O

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 % Al₂O₃

Iron 1.52 % Fe 2.17 % Fe₂O₃

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:

Na_1.8Ca_0.2Zr_0.7Ti_0.6Mn²⁺_0.2Mg_0.2Fe³⁺_0.1Al_0.1(Si₂O₇)O_1.3F_0.7

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 Arfvedsonite

Comments: Dark red translucent seidozerite with vitreous, black arfvedsonite.
Location: Seidozero Lake, Lovozero Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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:

PE_Seidozerite= 26.83 barns/electron
U=PE_Seidozerite x rElectron 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:

Notes:

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