Kimuraite-(Y) Mineral Data

Kimuraite-(Y) Mineral Data +

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General Kimuraite-(Y) Information

Chemical Formula:

CaY2(CO3)4·6(H2O)

Composition:

Molecular Weight = 566.02 gm

Calcium 7.08 % Ca 9.91 % CaO

Yttrium 31.41 % Y 39.89 % Y₂O₃

Hydrogen 2.14 % H 19.10 % H₂O

Carbon 8.49 % C 31.10 % CO₂

Oxygen 50.88 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaY₂(CO₃)₄·6(H₂O)

Environment:

Secondary mineral found in alkali olivine basalt.

IMA Status:

Approved IMA 1986

Locality:

Kirigo, Hizen, Higashi, Matsuura, Saga Prefecture, Japan. Link to MinDat.org Location Data.

Name Origin:

Named for Kenjiro Kimura (1896-), Geochemist, University of Japan.

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Kimuraite-(Y) Crystallography

Axial Ratios:

a:b:c =0.3857:1:0.2518

Cell Dimensions:

a = 9.25, b = 23.98, c = 6.04, Z = 4; V = 1,339.76 Den(Calc)= 2.81

Crystal System:

OrthorhombicSpace Group: Imm2,I mmm,I 222,I 2₁2₁2₁

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

By Intensity(I/I_o): 12.06(1), 6.02(0.4), 3.76(0.3),

Physical Properties of Kimuraite-(Y)

Cleavage:

[010] Perfect

Color:

White, Light purple pink, Light pink.

Density:

2.6

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Spherical - Spherical, rounded aggregates.

Hardness:

2.5 - Finger Nail

Luminescence:

Fluorescent, Short UV=reddish purple, Long UV=purple.

Luster:

Vitreous - Silky

Streak:

white

Optical Properties of Kimuraite-(Y)

Gladstone-Dale:

CI meas= -0.066 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2161,KPDmeas= 0.2336,KC= 0.2192

Optical Data:

Biaxial (-), a=1.584, b=1.612, g=1.626, bire=0.0420, 2V(Calc)=68, 2V(Meas)=70.

Calculated Properties of Kimuraite-(Y)

Electron Density:

r_electron=2.76 gm/cc
note: r_{Kimuraite-(Y)}=2.81 gm/cc.

Fermion Index

Fermion Index = 0.00127
Boson Index = 0.99873

Photoelectric:

PE_{Kimuraite-(Y)}= 38.59 barns/electron
U=PE_{Kimuraite-(Y)} x r_electron= 106.53 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Kimuraite-(Y) is Not Radioactive

Kimuraite-(Y) Classification

Dana Class:

15.4.5.1 (15)Hydrated Carbonates

(15.4)Dana Type

(15.4.5)Dana Group

15.4.5.1 Kimuraite-(Y) CaY2(CO3)4·6(H2O) Imm2,I mmm,I 222,I 2₁2₁2₁ Ortho

Strunz Class:

V/D.03-50 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 Kimuraite-(Y) Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Am.Min.,Vol.71,p1028-1033,1986)

See Also:

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

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Print or Cut-and-Paste your Kimuraite-(Y) Specimen Label here :

Kimuraite-(Y)

CaY2(CO3)4·6(H2O)
Dana No: 15.4.5.1 Strunz No: V/D.03-50
Locality:

Notes: