Kimuraite-(Y) Mineral Data

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.

Name Pronunciation:

Kimuraite-(Y) + Pronunciation

Kimuraite-(Y) Image

Images:

Kimuraite-(Y)

Comments: Tiny white kimuraite-(Y) crystals in fissures in basalt.
Location: Kirigo, Hizen-Cho, Higashi, Matsuura-Gun, Saga Pref., Japan. Scale: Picture size 2cm.
© Diederik Visser

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:

Orthorhombic Space 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
Ncalc = 1.57 - 1.62

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:

Bulk Density (Electron Density)=2.76 gm/cc
note: Specific Gravity of Kimuraite-(Y) =2.81 gm/cc.

Fermion Index:

Fermion Index = 0.0012767053
Boson Index = 0.9987232947

Photoelectric:

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

Radioactivity:

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

Kimuraite-(Y) Classification

Dana Class:

15.04.05.01 (15)Hydrated Carbonates

(15.04)Dana Type

(15.04.05)Dana Group

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

Strunz Class:

05.CC.50 05 - CARBONATES (NITRATES)

05.C - Carbonates without Additional Anions, with H2O

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

05.CC.50 Kimuraite-(Y) CaY2(CO3)4•6(H2O) Imm2,I mmm,I 222,I 2₁2₁2₁ Ortho

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 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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

Kimuraite-(Y)

CaY2(CO3)4•6(H2O)
Dana No: 15.04.05.01 Strunz No: 05.CC.50
Locality:

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