Wakefieldite-(Nd) Mineral Data

General Wakefieldite-(Nd) Information

Chemical Formula:

NdVO4

Composition:

Molecular Weight = 259.18 gm

Vanadium 19.65 % V 35.09 % V₂O₅

Neodymium 55.65 % Nd 64.91 % Nd₂O₃

Oxygen 24.69 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Nd(VO₄)

Environment:

Xenotime group

IMA Status:

Proposed IMA 2008 (Dana # Added)

Locality:

Arase mine, Kochi Prefecture, Shikoku, southwest Japan Link to MinDat.org Location Data.

Name Origin:

Commission on New Minerals, Nomenclature and Classification (CNMNC)

Name Pronunciation:

Wakefieldite-(Nd) + Pronunciation

Synonym:

ICSD 16299

IMA2008-031

PDF 15-769

Wakefieldite-(Nd) Image

Images:

Wakefieldite-(Nd)

Comments: Thin section image of wakefieldite-(Nd) in orange caryopilite with hematite and rhodochrosite.
Location: Ferruginous manganese ore from the Arise deposit, Kochi Prefecture, Japan. Scale: See Image.
© Advanced Industrial Science and Technology

Wakefieldite-(Nd) Crystallography

Axial Ratios:

a:c = 1:0.88702

Cell Dimensions:

a = 7.338, c = 6.509, Z = 4; V = 350.49 Den(Calc)= 4.91

Crystal System:

Tetragonal - Ditetragonal Pyramidal H-M Symbol (4mm) Space Group: I 4₁/amd

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

By Intensity(I/I_o): 3.67(1), 2.74(0.51), 4.84(0.27),1.886(0.25), 2.09(0.14), 2.6(0.11), 2.29(0.09), 2.92(0.07),

Optical Properties of Wakefieldite-(Nd)

Optical Data:

NCalc= 2.02 - from Gladstone-Dale relationship (KC = 0.2082) where Ncalc=Dcalc*KC+1

Calculated Properties of Wakefieldite-(Nd)

Electron Density:

Bulk Density (Electron Density)=4.36 gm/cc
note: Specific Gravity of Wakefieldite-(Nd) =4.91 gm/cc.

Fermion Index:

Fermion Index = 0.11
Boson Index = 0.89

Photoelectric:

PE_{Wakefieldite-(Nd)}= 332.77 barns/electron
U=PE_{Wakefieldite-(Nd)} x r_electron=1,449.95 barns/cc.

Radioactivity:

GRapi = 52,679.58 (Gamma Ray American Petroleum Institute Units)
Concentration of Wakefieldite-(Nd) per GRapi unit = 18.98 (PPM)

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

Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 10 cm box) 577.39 ±144.35 grams of pure Wakefieldite-(Nd) .

**Estimated Radioactivity from Wakefieldite-(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 / 7.30 cm	1,246,619	3.37E-05	52,679.58	17.32
100 gm / 3.39 cm	124,662	3.37E-06	5,267.96	1.73
10 gm / 1.57 cm	12,466	3.37E-07	526.80	0.17
1 gm / 7.30 mm	1,247	3.37E-08	52.68	0.02
0.1 gm / 3.39 mm	125	3.37E-09	5.27	0.00
0.01 gm / 1.57 mm	12	3.37E-10	0.53	0.00
0.001 gm / 0.73 mm	1	3.37E-11	0.05	0.00

Weight of pure Wakefieldite-(Nd) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.91 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 ( 2.78 % Th) From Sum REE Elements (55.65 % REE)

Wakefieldite-(Nd) Classification

Dana Class:

38.04.11.08 (38)Anhydrous Phosphates, etc

(38.04)A+ XO4

(38.04.11)Zenotime Group (Tetragonal: I41/amd)

38.04.11.01 Xenotime-(Y) YPO4 I 4₁/amd 4/m 2/m 2/m

38.04.11.02 Chernovite-(Y) YAsO4 I 4₁/amd 4/m 2/m 2/m

38.04.11.03 Wakefieldite-(Y) YVO4 I 4₁/amd 4/m 2/m 2/m

38.04.11.04 Wakefieldite-(Ce) (Ce,Pb,Pb)VO4 I 4₁/amd 4/m 2/m 2/m

38.04.11.05 Pretulite! ScPO4 I 4₁/amd 4/m 2/m 2/m

38.04.11.06 Xenotime-(Yb)! YbPO4 I 4₁/amd 4/m 2/m 2/m

38.04.11.07 Wakefieldite-(La)! LaVO4 I 4₁/amd 4mm

38.04.11.08 Wakefieldite-(Nd)! NdVO4 I 4₁/amd 4mm

Strunz Class:

08.AD.35 08 - PHOSPHATES, ARSENATES, VANADATES

08.A - Phosphates, etc. without additional anions, without H2O

08.AD -With only large cations

08.AD.35 Dreyerite BiVO4 I 4₁/amd 4/m 2/m 2/m

08.AD.35 Chernovite-(Y) YAsO4 I 4₁/amd 4/m 2/m 2/m

08.AD.35 Pretulite! ScPO4 I 4₁/amd 4/m 2/m 2/m

08.AD.35 Xenotime-(Y) YPO4 I 4₁/amd 4/m 2/m 2/m

08.AD.35 Wakefieldite-(Ce) (Ce,Pb,Pb)VO4 I 4₁/amd 4/m 2/m 2/m

08.AD.35 Wakefieldite-(Y) YVO4 I 4₁/amd 4/m 2/m 2/m

08.AD.35 Xenotime-(Yb)! YbPO4 I 4₁/amd 4/m 2/m 2/m

08.AD.35 Wakefieldite-(La)! LaVO4 I 4₁/amd 4mm

08.AD.35 Wakefieldite-(Nd)! NdVO4 I 4₁/amd 4mm

Other Wakefieldite-(Nd) Information

See Also:

Links to other databases for Wakefieldite-(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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Print or Cut-and-Paste your Wakefieldite-(Nd) Specimen Label here :

Wakefieldite-(Nd)

NdVO4
Dana No: 38.04.11.08 Strunz No: 08.AD.35
Locality:

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