Iimoriite-(Y) Mineral Data

Iimoriite-(Y) Mineral Data +

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General Iimoriite-(Y) Information

Chemical Formula:

Y2(SiO4)(CO3)

Composition:

Molecular Weight = 329.90 gm

Yttrium 53.90 % Y 68.45 % Y₂O₃

Silicon 8.51 % Si 18.21 % SiO₂

Carbon 3.64 % C 13.34 % CO₂

Oxygen 33.95 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Y₂(SiO₄)(CO₃)

Environment:

In quartz-microcline pegmatite.

IMA Status:

Approved IMA 1970

Locality:

Fusamata and Suishoyama, Kawatamachi, Fukushima Prefecture, Honsh, and Soraku, Kyoto Prefecture, Japan. Link to MinDat.org Location Data.

Name Origin:

Named for Satoyasa Iimorii (1885-1982), Japanese analytical chemist and REE specialist.

Synonym:

ICSD 82489

PDF 35-640

Iimoriite-(Y) Image

Images:

Iimoriite-(Y)

Comments: Nearly colorless prismatic crystal of immolate-(Y) on dolomite.
Location: Trimouns Talc Mine, Luzenac, Ari?ge, Midi-Pyr?n?es, France. Scale: Picture size 1.2 mm.
© Thomas Witzke / Abraxas-Verlag

Iimoriite-(Y) Crystallography

Axial Ratios:

a:b:c =0.9882:1:0.9703

Cell Dimensions:

a = 6.573, b = 6.651, c = 6.454, Z = 2; alpha = 116.44°, beta = 92.34°, gamma = 95.63° V = 251.21 Den(Calc)= 4.36

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 2.88(1), 2.95(0.8), 2.78(0.4),

Crystal Structure:

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Hughes J M , Foord E E , Jai-Nhuknan J , Bell J M , The Canadian Mineralogist , 34 (1996) p.817-820, The atomic arrangement of Iimoriite-(Y), Y2(SiO4)(CO3)

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

Physical Properties of Iimoriite-(Y)

Cleavage:

[011] Distinct

Color:

Brown, Colorless, Gray pink, White, Purple gray.

Density:

4.47

Hardness:

5.5-6 - Knife Blade-Orthoclase

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Iimoriite-(Y)

Gladstone-Dale:

CI meas= 0.016 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.009 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.184,KPDmeas= 0.1795,KC= 0.1824

Optical Data:

Biaxial (-), a=1.753, b=1.824, g=1.83, bire=0.0770, 2V(Calc)=30, 2V(Meas)=31.

Calculated Properties of Iimoriite-(Y)

Electron Density:

r_electron=4.07 gm/cc
note: r_{Iimoriite-(Y)}=4.36 gm/cc.

Fermion Index

Fermion Index = 0.00453
Boson Index = 0.99547

Photoelectric:

PE_{Iimoriite-(Y)}= 68.13 barns/electron
U=PE_{Iimoriite-(Y)} x r_electron= 277.34 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Iimoriite-(Y) is Not Radioactive

Iimoriite-(Y) Classification

Dana Class:

53.1.3.1 (53)Nesosilicate Insular SiO4 Groups and Other Anions of Complex Cations

(53.1)with (CO3)

(53.1.3)Dana Group

53.1.3.1 Iimoriite-(Y) Y2(SiO4)(CO3) P1 1

Strunz Class:

VIII/B.08-10 VIII - Silicates

VIII/B - Nesosubsilicates, with anions unfamiliar to tetraheders, cations of octahedral and tetrahedral orientation [4/6]

VIII/B.08 - Ilmoriite-(Y) series

VIII/B.08-10 Iimoriite-(Y) Y2(SiO4)(CO3) P1 1

Other Iimoriite-(Y) Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

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

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Iimoriite-(Y)

Y2(SiO4)(CO3)
Dana No: 53.1.3.1 Strunz No: VIII/B.08-10
Locality:

Notes: