Ningyoite Mineral Data

General Ningyoite Information

Chemical Formula:

(U,Ca,Ce)2(PO4)2•1-2(H2O)

Composition:

Molecular Weight = 554.67 gm

Calcium 4.34 % Ca 6.07 % CaO

Cerium 5.05 % Ce 5.92 % Ce₂O₃

Uranium 51.50 % U 58.42 % UO₂

Phosphorus 11.17 % P 25.59 % P₂O₅

Hydrogen 0.55 % H 4.87 % H₂O

Oxygen 27.40 % O

______ ______

100.00 % 100.87 % = TOTAL OXIDE

Empirical Formula:

2(U_0.6)2(Ca_0.3)2(Ce_0.1)(PO₄)₂•1.5(H₂O)

Environment:

Principal uranium mineral, as coatings and filling cavities in a carbonaceous conglomerate

IMA Status:

Approved IMA 1959

Locality:

Ningyo-Toge uranium mine, Tottori Prefecture, Japan. Link to MinDat.org Location Data.

Name Origin:

Named for Ningyo Pass, Japan, where the mine in which the mineral was first found is located.

Name Pronunciation:

Ningyoite + Pronunciation

Ningyoite Image

Images:

Ningyoite

Comments: Greenish-black fine grained ningyoite masses with minor rock.
Location: Ningyo-Toge Mine, Okayama, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ningyoite Crystallography

Axial Ratios:

a:b:c =0.5603:1:0.5272

Cell Dimensions:

a = 6.78, b = 12.1, c = 6.38, Z = 3; V = 523.40 Den(Calc)= 5.28

Crystal System:

Orthorhombic - Disphenoidal H-M Symbol (2 2 2) Space Group: P 222

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

By Intensity(I/I_o): 3.02(1), 2.13(0.8), 2.81(0.8),

Physical Properties of Ningyoite

Cleavage:

None

Color:

Brown, Brownish green.

Density:

4.75

Diaphaneity:

Translucent

Hardness:

3-4 - Calcite-Fluorite

Luster:

Greasy (Oily)

Optical Properties of Ningyoite

Gladstone-Dale:

CI meas= 0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.106 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1278,KPDmeas= 0.1421,KC= 0.1431
Ncalc = 1.68 - 1.76

Optical Data:

Biaxial (?), b=1.64-1.71

Calculated Properties of Ningyoite

Electron Density:

Bulk Density (Electron Density)=4.16 gm/cc
note: Specific Gravity of Ningyoite =4.75 gm/cc.

Fermion Index:

Fermion Index = 0.0038986122
Boson Index = 0.9961013878

Photoelectric:

PE_Ningyoite=1,361.21 barns/electron
U=PE_Ningyoite x r_electron=5,665.28 barns/cc.

Radioactivity:

GRapi = 3,850,740.58 (Gamma Ray American Petroleum Institute Units)
Concentration of Ningyoite per GRapi unit = 259.69 (PPB)

Ningyoite 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) 7.90 ± 1.97 grams of pure Ningyoite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 789.89 ±197.47 grams of pure Ningyoite .

**Estimated Radioactivity from Ningyoite** - very strong
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 / 7.38 cm	92,291,575	2.49E-03	3,850,740.58	1,266.00
100 gm / 3.43 cm	9,229,158	2.49E-04	385,074.06	126.60
10 gm / 1.59 cm	922,916	2.49E-05	38,507.41	12.66
1 gm / 7.38 mm	92,292	2.49E-06	3,850.74	1.27
0.1 gm / 3.43 mm	9,229	2.49E-07	385.07	0.13
0.01 gm / 1.59 mm	923	2.49E-08	38.51	0.01
0.001 gm / 0.74 mm	92	2.49E-09	3.85	0.00

Weight of pure Ningyoite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.75 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 ( 0.25 % Th) From Sum REE Elements ( 5.05 % REE)

Ningyoite Classification

Dana Class:

40.04.08.01 (40)Hydrated Phosphates, etc

(40.04)where A+++ XO4 ï¿½ x(H2O)

(40.04.08)Ningyoite Group

40.04.08.01 Ningyoite (U,Ca,Ce)2(PO4)2•1-2(H2O) P 222 2 2 2

40.04.08.02 Lermontovite U(PO4)(OH)•(H2O)(?) C cca 2/m 2/m 2/m

40.04.08.03 Vyacheslavite U(PO4)(OH)•2.5(H2O) C mcm, C mc2₁, C 2cm Ortho

Strunz Class:

08.CJ.80 08 - PHOSPHATES, ARSENATES, VANADATES

08.C - Phosphates without Additional Anions, with H2O

08.CJ -With only large cations

08.CJ.80 Ningyoite (U,Ca,Ce)2(PO4)2•1-2(H2O) P 222 2 2 2

Other Ningyoite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Ningyoite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - Uranium Minerals

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Ningyoite

(U,Ca,Ce)2(PO4)2•1-2(H2O)
Dana No: 40.04.08.01 Strunz No: 08.CJ.80
Locality:

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