Ningyoite Mineral Data

Ningyoite Mineral Data +

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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)

IMA Status:

Approved IMA 1959

Locality:

Link to MinDat.org Location Data.

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 - DisphenoidalH-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

Diaphaniety:

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

Optical Data:

Biaxial (?), b=1.64-1.71

Calculated Properties of Ningyoite

Electron Density:

r_electron=4.16 gm/cc
note: r_Ningyoite=4.75 gm/cc.

Fermion Index

Fermion Index = 0.00389
Boson Index = 0.99611

Photoelectric:

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

Radioactivity:

GRapi = 3,850,738.60 (Gamma Ray American Petroleum Institute Units)

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	92,291,564	2.49E-03	3,850,738.60	1,266.00
100 gm / 3.43 cm	9,229,156	2.49E-04	385,073.86	126.60
10 gm / 1.59 cm	922,916	2.49E-05	38,507.39	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:

40.4.8.1 (40)Hydrated Phosphates, etc

(40.4)where A+++ XO4 · x(H2O)

(40.4.8)Dana Group

40.4.8.1 Ningyoite (U,Ca,Ce)2(PO4)2·1-2(H2O) P 222 2 2 2

40.4.8.2 Lermontovite U(PO4)(OH)·(H2O)(?) C cca 2/m 2/m 2/m

40.4.8.3 Vyacheslavite U(PO4)(OH)·2.5(H2O) C mcm, C mc2₁, C 2cm Ortho

Strunz Class:

VII/C.29-70 VII - Phosphates, Arsenates and Vanadates

VII/C - Water-bearing phosphates without unfamiliar anions, cations of medium and big size: Fe, Mn, Zn, Mg and Ca, (NH4)1+

VII/C.29 - Rhabdophane group

VII/C.29-10 Rhabdophane-(Ce) (Ce,La)PO4·(H2O) P 6₂22 6 2 2

VII/C.29-20 Rhabdophane-(La) (La,Ce)PO4·(H2O) P 6₂22 6 2 2

VII/C.29-30 Rhabdophane-(Nd) (Nd,Ce,La)PO4·(H2O) P 6₂22 6 2 2

VII/C.29-40 Brockite (Ca,Th,Ce)(PO4)·(H2O) P 6₂22 6 2 2

VII/C.29-50 Tristramite (Ca,U,Fe)(PO4,SO4)·2(H2O) P 6₂22 6 2 2

VII/C.29-60 Grayite (Th,Pb,Ca)PO4·(H2O) P 6₂22 6 2 2

VII/C.29-70 Ningyoite (U,Ca,Ce)2(PO4)2·1-2(H2O) P 222 2 2 2

Other Ningyoite 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 Ningyoite :
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 - Uranium Minerals 13 -École des Mines de Paris

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Ningyoite

(U,Ca,Ce)2(PO4)2·1-2(H2O)
Dana No: 40.4.8.1 Strunz No: VII/C.29-70
Locality:

Notes: