Chukhrovite-(Y) Mineral Data

Chukhrovite-(Y) Mineral Data

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General Chukhrovite-(Y) Information

Chemical Formula:

Ca3(Y,Ce)Al2(SO4)F13·10(H2O)

Composition:

Molecular Weight = 799.10 gm

Calcium 15.05 % Ca 21.05 % CaO

Cerium 4.38 % Ce 5.13 % Ce₂O₃

Yttrium 8.34 % Y 10.60 % Y₂O₃

Aluminum 6.75 % Al 12.76 % Al₂O₃

Hydrogen 2.52 % H 22.54 % H₂O

Sulfur 4.01 % S 10.02 % SO₃

Oxygen 28.03 % O

Fluorine 30.91 % F 30.91 % F

- % F -13.01 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₃Y_0.75Ce_0.25Al₂(SO₄)F₁₃·10(H₂O)

IMA Status:

Approved IMA 1960

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 100728

PDF 14-61

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Chukhrovite-(Y) Crystallography

Cell Dimensions:

a = 16.8, Z = 8; V = 4,741.63 Den(Calc)= 2.24

Crystal System:

Isometric - DiploidalH-M Symbol (2/m 3) Space Group: F d3

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

By Intensity(I/I_o): 1.834(1), 2.193(1), 3.261(0.9),

Physical Properties of Chukhrovite-(Y)

Cleavage:

[???] Indistinct

Color:

Colorless, White.

Density:

2.274 - 2.398, Average = 2.33

Diaphaniety:

Transparent to Translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Hardness:

3 - Calcite

Luster:

Vitreous - Pearly

Streak:

white

Optical Properties of Chukhrovite-(Y)

Gladstone-Dale:

CI meas= 0.081 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.042 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1964,KPDmeas= 0.1884,KC= 0.2049

Optical Data:

Isotropic, n=1.44.

Calculated Properties of Chukhrovite-(Y)

Electron Density:

r_electron=2.21 gm/cc
note: r_{Chukhrovite-(Y)}=2.24 gm/cc.

Fermion Index

Fermion Index = 0.00064
Boson Index = 0.99936

Photoelectric:

PE_{Chukhrovite-(Y)}= 32.93 barns/electron
U=PE_{Chukhrovite-(Y)} x r_electron= 72.87 barns/cc.

Radioactivity:

GRapi = 4,619.58 (Gamma Ray American Petroleum Institute Units)

Chukhrovite-(Y) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

**Estimated Radioactivity from Chukhrovite-(Y)** - mild
Specimen Size Weight/Volume (Sphere) *	Calculated Activity Bequerols (Bq)	Calculated Activity Curies (Ci)	Estimated Activity GR(api)	Estimated Exposure (mRem**)/hr If Held in Hand For One Hour
1000 gm / 9.48 cm	98,191	2.65E-06	4,619.58	1.52
100 gm / 4.40 cm	9,819	2.65E-07	461.96	0.15
10 gm / 2.04 cm	982	2.65E-08	46.20	0.02
1 gm / 9.48 mm	98	2.65E-09	4.62	0.00
0.1 gm / 4.40 mm	10	2.65E-10	0.46	0.00
0.01 gm / 2.04 mm	1	2.65E-11	0.05	0.00
0.001 gm / 0.95 mm	0	2.65E-12	0.00	0.00

Weight of pure Chukhrovite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.24 gm/cc.*
Goverment Estimate of Average Annual Exposure ( 360 mRem) **
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem
Estimated Thorium Activity ( 0.22 % Th) From Sum REE Elements ( 4.38 % REE)

Chukhrovite-(Y) Classification

Dana Class:

12.1.5.1 (12)Compound Halides

(12.1)with miscellaneous anions

(12.1.5)Dana Group

12.1.5.1 Chukhrovite-(Y) Ca3(Y,Ce)Al2(SO4)F13·10(H2O) F d3 2/m 3

12.1.5.2 Chukhrovite-(Ce) Ca3(Ce,Y)Al2(SO4)F13·10(H2O) F d3 2/m 3

12.1.5.3 IMA2002-050! Ca4AlSi(SO4)F13·12(H2O) F d3 2/m 3

12.1.5.4 Chukhrovite-(Nd)! Ca3(Nd,Y)Al2(SO4)F13·12(H2O) F d3 2/m 3

Strunz Class:

III/C.01-50 III - Halogenides

III/C - Double halogenides with water, Fluorides

III/C.01 - Gearksutite - Chukhrovite - (Ce) series

III/C.01-10 Gearksutite CaAl(OH,F)5·(H2O) Mono

III/C.01-20 Acuminite SrAlF4(OH)·(H2O) C 2/c 2/m

III/C.01-30 Tikhonenkovite SrAl(OH)F4·(H2O) Unk Mono

III/C.01-35 Artroeite PbAlF3(OH)2 P1 1

III/C.01-40 Creedite Ca3Al2(SO4)(F,OH)10·2(H2O) C 2/c 2/m

III/C.01-50 Chukhrovite-(Y) Ca3(Y,Ce)Al2(SO4)F13·10(H2O) F d3 2/m 3

III/C.01-60 Chukhrovite-(Ce) Ca3(Ce,Y)Al2(SO4)F13·10(H2O) F d3 2/m 3

Other Chukhrovite-(Y) Information

References:

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

See Also:

Links to other databases for Chukhrovite-(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 12 -École des Mines de Paris

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Chukhrovite-(Y)

Ca3(Y,Ce)Al2(SO4)F13·10(H2O)
Dana No: 12.1.5.1 Strunz No: III/C.01-50
Locality:

Notes: