Shomiokite-(Y) Mineral Data

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)

Environment:

Interstices and as large segregations in potassic feldspar in pegmatites.

IMA Status:

Approved IMA 1992

Locality:

Mt. Alluaiv, Lovozero massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the Shomiok River, in the Lovozero massif, flowing near Mt. Alluaiv, where the mineral was first found.

Name Pronunciation:

Shomiokite-(Y) + Pronunciation

Synonym:

ICSD 82483

IMA1990-015

PDF 46-1418

Shomiokite-(Y) Image

Images:

Shomiokite-(Y)

Comments: Rose-colored single crystal of shomiokite-(Y).
Location: Mt. Alluaiv, Lovozero, Kola, Russia. Scale: Specimen Size 6x9 mm.
© Diederik Visser

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 - Pyramidal H-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),

Physical Properties of Shomiokite-(Y)

Cleavage:

{???} Perfect

Color:

Colorless.

Density:

2.52

Diaphaneity:

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
Ncalc = 1.53

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:

Bulk Density (Electron Density)=2.46 gm/cc
note: Specific Gravity of Shomiokite-(Y) =2.51 gm/cc.

Fermion Index:

Fermion Index = 0.0012487012
Boson Index = 0.9987512988

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Shomiokite-(Y) is Not Radioactive

Shomiokite-(Y) Classification

Dana Class:

15.04.07.01 (15)Hydrated Carbonates

(15.04)Dana Type

(15.04.07)Dana Group

15.04.07.01 Shomiokite-(Y) Na3Y(CO3)3•3(H2O) Pbn21 mm2

Strunz Class:

05.CC.20 05 - CARBONATES (NITRATES)

05.C - Carbonates without Additional Anions, with H2O

05.CC -With rare-earth elements (REE)

05.CC.20 Shomiokite-(Y) Na3Y(CO3)3•3(H2O) Pbn21 mm2

05.CC.20 IMA2008-069 Na3Y(CO3)3•6H2O P 6₃ 6

Other Shomiokite-(Y) Information

References:

NAME( AntBidBlaNic3) 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 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
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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Print or Cut-and-Paste your Shomiokite-(Y) Specimen Label here :

Shomiokite-(Y)

Na3Y(CO3)3•3(H2O)
Dana No: 15.04.07.01 Strunz No: 05.CC.20
Locality:

Notes:

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