Shomiokite-(Y) Mineral Data

Shomiokite-(Y) Mineral Data +

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General Shomiokite-(Y) Information

Chemical Formula:

Na3Y(CO3)3·3(H2O)

Composition:

Molecular Weight = 391.95 gm

Sodium 17.60 % Na 23.72 % Na₂O

Yttrium 22.68 % Y 28.81 % Y₂O₃

Hydrogen 1.54 % H 13.79 % H₂O

Carbon 9.19 % C 33.69 % CO₂

Oxygen 48.98 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₃Y(CO₃)₃·3(H₂O)

IMA Status:

Approved IMA 1992

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 82483

IMA1990-015

PDF 46-1418

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Shomiokite-(Y) Crystallography

Axial Ratios:

a:b:c =1.7299:1:0.5925

Cell Dimensions:

a = 17.358, b = 10.034, c = 5.946, Z = 4; V = 1,035.62 Den(Calc)= 2.51

Crystal System:

Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: Pbn21

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

By Intensity(I/I_o): 2.076(1), 2.858(0.7), 4.85(0.65),

Crystal Structure:

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Grice J D , The Canadian Mineralogist , 34 (1996) p.649-655, The crystal structure of shomiokite-(Y)

View Additional jPOWD Structure files for Shomiokite-(Y)
[1]

Physical Properties of Shomiokite-(Y)

Cleavage:

[???] Perfect

Color:

Colorless.

Density:

2.52

Diaphaniety:

Transparent to Translucent

Hardness:

2-3 - Gypsum-Calcite

Luster:

Earthy (Dull)

Streak:

white

Optical Properties of Shomiokite-(Y)

Gladstone-Dale:

CI meas= 0.009 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.005 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2109,KPDmeas= 0.2101,KC= 0.212

Optical Data:

Biaxial (+), a=1.528, b=1.529, g=1.531, bire=0.0030, 2V(Calc)=72, 2V(Meas)=39-49.

Calculated Properties of Shomiokite-(Y)

Electron Density:

r_electron=2.46 gm/cc
note: r_{Shomiokite-(Y)}=2.51 gm/cc.

Fermion Index

Fermion Index = 0.00124
Boson Index = 0.99876

Photoelectric:

PE_{Shomiokite-(Y)}= 27.61 barns/electron
U=PE_{Shomiokite-(Y)} x r_electron= 67.91 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Shomiokite-(Y) is Not Radioactive

Shomiokite-(Y) Classification

Dana Class:

15.4.7.1 (15)Hydrated Carbonates

(15.4)Dana Type

(15.4.7)Dana Group

15.4.7.1 Shomiokite-(Y) Na3Y(CO3)3·3(H2O) Pbn21 mm2

Strunz Class:

V/D.03-05 V - Nitrates, Carbonates and Borates

V/D - Water-bearing carbonates without unfamiliar anions

V/D.03 - Calkinsite-(Ce) - Lokkaite-(Y) series

V/D.03-02 Adamsite-(Y)! NaY(CO3)2·6(H2O) P1 1

V/D.03-05 Shomiokite-(Y) Na3Y(CO3)3·3(H2O) Pbn21 mm2

V/D.03-10 Calkinsite-(Ce) (Ce,La)2(CO3)3·4(H2O) P 2₁221 2 2 2

V/D.03-20 Lanthanite-(La) (La,Ce)2(CO3)3·8(H2O) Pbnb 2/m 2/m 2/m

V/D.03-30 Lanthanite-(Ce) (Ce,La)2(CO3)3·8(H2O) Pbnb 2/m 2/m 2/m

V/D.03-40 Lanthanite-(Nd) (Nd,La)2(CO3)3·8(H2O) Pbnb 2/m 2/m 2/m

V/D.03-45 Tengerite-(Y) Y2(CO3)3·2-3(H2O) Pb21m mm2

V/D.03-50 Kimuraite-(Y) CaY2(CO3)4·6(H2O) Imm2,I mmm,I 222,I 2₁2₁2₁ Ortho

V/D.03-55 Galgenbergite-(Ce)! Ca(REE)2(CO3)4·(H2O) P1 1

V/D.03-60 Lokkaite-(Y) CaY4(CO3)7·9(H2O) Pb2m mm2

Other Shomiokite-(Y) Information

References:

PHYS. PROP.(Am.Min.,Vol.79,p766,1994) OPTIC PROP.(Am.Min.,Vol.79,p766,1994)

See Also:

Links to other databases for Shomiokite-(Y) :
1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 -Am. Min. Crystal Structure Database 4 -Athena 5 - EUROmin Project 6 -Google Images 7 -Google Scholar 8 -Handbook of Mineralogy (UofA) 9 -MinDAT 10 -MinMax(Deutsch) 11 -MinMax(English) 12 -Mineralienatlas (Deutsch) 13 -QUT Mineral Atlas 14 - WWW-MINCRYST

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Shomiokite-(Y)

Na3Y(CO3)3·3(H2O)
Dana No: 15.4.7.1 Strunz No: V/D.03-05
Locality:

Notes: