Chukhrovite-(Nd) Mineral Data

Chukhrovite-(Nd) Mineral Data

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General Chukhrovite-(Nd) Information

Chemical Formula:

Ca3(Nd,Y)Al2(SO4)F13·12(H2O)

Composition:

Molecular Weight = 863.83 gm

Calcium 13.92 % Ca 19.48 % CaO

Yttrium 2.57 % Y 3.27 % Y₂O₃

Aluminum 6.25 % Al 11.80 % Al₂O₃

Hydrogen 2.80 % H 25.03 % H₂O

Sulfur 3.71 % S 9.27 % SO₃

Neodymium 12.52 % Nd 14.61 % Nd₂O₃

Oxygen 29.63 % O

Fluorine 28.59 % F 28.59 % F

- % F -12.04 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₃Nd_0.75Y_0.25Al₂(SO₄)F₁₃·12(H₂O)

Environment:

Nd-dominant analogue of chukhrovite

IMA Status:

Proposed IMA 2004 (Dana # Added)

Locality:

Kara-Oba, Betpakdala Desert, Kazakhstan Link to MinDat.org Location Data.

Name Origin:

Named as the Nd-dominant analogue of chukhrovite-(Y) and chukhrovite-(Ce).

Synonym:

IMA2004-023

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Chukhrovite-(Nd) Crystallography

Cell Dimensions:

a = 16.759, Z = 8; V = 4,707.00 Den(Calc)= 2.44

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): 9.7(1), 3.22(0.8), 2.555(0.7),5.92(0.7), 2.18(0.6), 1.827(0.5), 2.24(0.5), 4.2(0.4),

Optical Properties of Chukhrovite-(Nd)

Optical Data:

NCalc= 1.5 - from Gladstone-Dale relationship (KC = 0.2058) where Ncalc=Dcalc*KC+1

Calculated Properties of Chukhrovite-(Nd)

Electron Density:

r_electron=2.41 gm/cc
note: r_{Chukhrovite-(Nd)}=2.44 gm/cc.

Fermion Index

Fermion Index = 0.02626
Boson Index = 0.97374

Photoelectric:

PE_{Chukhrovite-(Nd)}= 72.02 barns/electron
U=PE_{Chukhrovite-(Nd)} x r_electron= 173.22 barns/cc.

Radioactivity:

GRapi = 13,167.52 (Gamma Ray American Petroleum Institute Units)

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

**Estimated Radioactivity from Chukhrovite-(Nd)** - weak
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 / 9.22 cm	280,522	7.58E-06	13,167.52	4.33
100 gm / 4.28 cm	28,052	7.58E-07	1,316.75	0.43
10 gm / 1.99 cm	2,805	7.58E-08	131.68	0.04
1 gm / 9.22 mm	281	7.58E-09	13.17	0.00
0.1 gm / 4.28 mm	28	7.58E-10	1.32	0.00
0.01 gm / 1.99 mm	3	7.58E-11	0.13	0.00
0.001 gm / 0.92 mm	0	7.58E-12	0.01	0.00

Weight of pure Chukhrovite-(Nd) in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.44 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 ( 0.63 % Th) From Sum REE Elements (12.52 % REE)

Chukhrovite-(Nd) Classification

Dana Class:

12.1.5.4 (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/X.00-00 III - Halogenides

III/X - Unclassified Strunz Halogenides

III/X.00 - Fluoride, Sulfate

Other Chukhrovite-(Nd) Information

See Also:

Links to other databases for Chukhrovite-(Nd) :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Chukhrovite-(Nd)

Ca3(Nd,Y)Al2(SO4)F13·12(H2O)
Dana No: 12.1.5.4 Strunz No: III/X.00-00
Locality:

Notes: