Chukhrovite-(Nd) Mineral Data

General Chukhrovite-(Nd) Information

Chemical Formula:

Ca3(Nd,Y)Al2(SO4)F13•12(H2O)

Composition:

Molecular Weight = 857.24 gm

Calcium 14.31 % Ca 20.02 % CaO

Lanthanum 1.94 % La 2.28 % La₂O₃

Cerium 1.14 % Ce 1.34 % Ce₂O₃

Praeseodymium 1.15 % Pr 1.35 % Pr₂O₃

Samarium 1.58 % Sm 1.83 % Sm₂O₃

Gadolinium 0.92 % Gd 1.06 % Gd₂O₃

Dysprosium 0.38 % Dy 0.44 % Dy₂O₃

Yttrium 1.56 % Y 1.98 % Y₂O₃

Holmium 0.19 % Ho 0.22 % Ho₂O₃

Aluminum 6.39 % Al 12.07 % Al₂O₃

Hydrogen 2.79 % H 24.95 % H₂O

Sulfur 3.78 % S 9.43 % SO₃

Neodymium 5.38 % Nd 6.28 % Nd₂O₃

Oxygen 29.54 % O

Fluorine 28.94 % F 28.94 % F

- % F -12.19 % -O=F₂

______ ______

100.00 % 99.99 % = TOTAL OXIDE

Empirical Formula:

Ca_3.06Nd_0.32Y_0.15La_0.12Sm_0.09Ce_0.07Pr_0.07Gd_0.05Dy_0.02Ho_0.01Al_2.03S_1.01O_3.96F_13.06ï¿½11.87(H₂O)

Environment:

Oxidized zone of molybdenum-tungsten deposit. Nd-dominant analogue of chukhrovite

IMA Status:

Approved 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

Chukhrovite-(Nd) Image

Images:

Chukhrovite-(Nd)

Comments: SEM image of chukhrovite-(Nd) crystals. (New Data on Minerals. M., 2005. Vol. 40).
Location: Oxidized zone of the Kara-Oba deposit (Central Kazakhstan). Scale: Scale bar 10µm.
© New Data on Minerals

Chukhrovite-(Nd) Crystallography

Cell Dimensions:

a = 16.759, Z = 8; V = 4,707.00 Den(Calc)= 2.42

Crystal System:

Isometric - Diploidal H-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),

Physical Properties of Chukhrovite-(Nd)

Cleavage:

{111} Indistinct, {111} Indistinct, {111} Indistinct

Color:

Colorless, White.

Density:

2.42

Diaphaneity:

Transparent

Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Hardness:

3.5-4 - Copper Penny-Fluorite

Luster:

Vitreous - Greasy

Streak:

white

Calculated Properties of Chukhrovite-(Nd)

Electron Density:

Bulk Density (Electron Density)=2.39 gm/cc
note: Specific Gravity of Chukhrovite-(Nd) =2.42 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_{Chukhrovite-(Nd)}= 72.18 barns/electron
U=PE_{Chukhrovite-(Nd)} x r_electron= 172.20 barns/cc.

Radioactivity:

GRapi = 13,438.27 (Gamma Ray American Petroleum Institute Units)
Concentration of Chukhrovite-(Nd) per GRapi unit = 74.41 (PPM)

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 / 9.24 cm	286,279	7.74E-06	13,438.27	4.42
100 gm / 4.29 cm	28,628	7.74E-07	1,343.83	0.44
10 gm / 1.99 cm	2,863	7.74E-08	134.38	0.04
1 gm / 9.24 mm	286	7.74E-09	13.44	0.00
0.1 gm / 4.29 mm	29	7.74E-10	1.34	0.00
0.01 gm / 1.99 mm	3	7.74E-11	0.13	0.00
0.001 gm / 0.92 mm	0	7.74E-12	0.01	0.00

Weight of pure Chukhrovite-(Nd) in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.42 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 (12.69 % REE)

Chukhrovite-(Nd) Classification

Dana Class:

12.01.05.04 (12)Compound Halides

(12.01)with miscellaneous anions

(12.01.05)Chukhrovite Group

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

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

12.01.05.03 Meniaylovite! Ca4AlSi(SO4)F13•12(H2O) F d3 2/m 3

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

Strunz Class:

03.CG.10 03 - HALIDES

03.C - Complex Halides

03.CG -Aluminofluorides with CO3, SO4, PO4

03.CG.10 Chukhrovite-(Ce) Ca3(Ce,Y)Al2(SO4)F13•10(H2O) F d3 2/m 3

03.CG.10 Chukhrovite-(Y) Ca3(Y,Ce)Al2(SO4)F13•10(H2O) F d3 2/m 3

03.CG.10 Meniaylovite! Ca4AlSi(SO4)F13•12(H2O) F d3 2/m 3

03.CG.10 Chukhrovite-(Nd)! Ca3(Nd,Y)Al2(SO4)F13•12(H2O) F d3 2/m 3

Other Chukhrovite-(Nd) Information

References:

NAME( New Data on Minerals. M., 2005. Vol. 40) PHYS. PROP.(New Data on Minerals. M., 2005. Vol. 40) OPTIC PROP.(New Data on Minerals. M., 2005. Vol. 40)

See Also:

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

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Chukhrovite-(Nd)

Ca3(Nd,Y)Al2(SO4)F13•12(H2O)
Dana No: 12.01.05.04 Strunz No: 03.CG.10
Locality:

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