Uramphite Mineral Data

General Uramphite Information

Chemical Formula:

(NH4)(UO2)(PO4)•3(H2O)

Composition:

Molecular Weight = 437.08 gm

Uranium 54.46 % U 61.78 % UO₂

Phosphorus 7.09 % P 16.24 % P₂O₅

Hydrogen 0.92 % H - % Calc as (NH₄)₂O

Hydrogen 1.38 % H 12.37 % H₂O

Nitrogen 3.20 % N 5.96 % (NH₄)₂O

Oxygen 32.94 % O

______ ______

100.00 % 96.34 % = TOTAL OXIDE

Empirical Formula:

(NH₄)(UO₂)(PO₄)•3(H₂O)

Environment:

Formed on low-rank coal where uranium-bearing groundwater interacts with ammonium ions in sedimentary coal deposits.

IMA Status:

Valid Species (Pre-IMA) 1957

Locality:

Tura-Kavak, Issyk-Kul'skaya Oblast', Kyrgyzstan Link to MinDat.org Location Data.

Name Origin:

Named for the composition of (UR)anium and (AM)monium and (PH)osphate in the composition.

Name Pronunciation:

Uramphite + Pronunciation

Synonym:

ICSD 37076

PDF 42-384

Uramphite Image

Images:

Uramphite

Comments: Thin encrustions of urampite on a fracture surface in sub-bituminous coal.
Location: Tura-Kavak, Issyk-Kul'skaya Oblast', Kyrgyzstan. Scale: See Image.
© Paul M. Schumacher

Uramphite Crystallography

Axial Ratios:

a:c = 1:1.29101

Cell Dimensions:

a = 7.01, c = 9.05, Z = 2; V = 444.72 Den(Calc)= 3.26

Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4/nmm

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

By Intensity(I/I_o): 3.8(1), 9.02(1), 3.26(0.9),

Crystal Structure:

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Fitch A N , Fender B E F , Acta Crystallographica, Section C , 39 (1983) p.162-166, The structure of deuterated ammomium uranyl phosphate trihydrate,, ND4UO2PO4*3D2O by powder neutron diffraction

Physical Properties of Uramphite

Cleavage:

{???} Distinct

Color:

Bottle green, Light green.

Density:

3.7

Diaphaneity:

Transparent to Translucent

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Hardness:

2-2.5 - Gypsum-Finger Nail

Luminescence:

Fluorescent, Short UV=medium yellow-green, Long UV=medium yellow-green.

Luster:

Vitreous (Glassy)

Streak:

greenish white

Optical Properties of Uramphite

Gladstone-Dale:

CI meas= -0.17 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.328 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1773,KPDmeas= 0.1562,KC= 0.1335
Ncalc = 1.44 - 1.49

Optical Data:

Biaxial (-), a=1.564, b=1.585, g=1.585, bire=0.0210, 2V(Calc)=0, 2V(Meas)=0-3.

Calculated Properties of Uramphite

Electron Density:

Bulk Density (Electron Density)=3.32 gm/cc
note: Specific Gravity of Uramphite =3.70 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_Uramphite=1,378.05 barns/electron
U=PE_Uramphite x r_electron=4,572.88 barns/cc.

Radioactivity:

GRapi = 4,163,138.58 (Gamma Ray American Petroleum Institute Units)
Concentration of Uramphite per GRapi unit = 240.20 (PPB)

Uramphite 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) 7.31 ± 1.83 grams of pure Uramphite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 730.62 ±182.65 grams of pure Uramphite .

**Estimated Radioactivity from Uramphite** - very strong
Specimen Size Weight/Volume (Sphere) *	Calculated Activity Becquerels (Bq)	Calculated Activity Curies (Ci)	Estimated Activity GR(api)	Estimated Exposure (mRem**)/hr If Held in Hand For One Hour
1000 gm / 8.02 cm	97,480,648	2.63E-03	4,163,138.58	1,368.70
100 gm / 3.72 cm	9,748,065	2.63E-04	416,313.86	136.87
10 gm / 1.73 cm	974,806	2.63E-05	41,631.39	13.69
1 gm / 8.02 mm	97,481	2.63E-06	4,163.14	1.37
0.1 gm / 3.72 mm	9,748	2.63E-07	416.31	0.14
0.01 gm / 1.73 mm	975	2.63E-08	41.63	0.01
0.001 gm / 0.80 mm	97	2.63E-09	4.16	0.00

Weight of pure Uramphite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.70 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

Uramphite Classification

Dana Class:

40.02a.07.01 (40)Hydrated Phosphates, etc

(40.02a)where A++ (B++)2 (XO4) · x(H2O), containing (UO2)++

(40.02a.07)Dana Group

40.02a.07.01 Uramphite (NH4)(UO2)(PO4)•3(H2O) P 4/nmm 4/m 2/m 2/m

40.02a.07.02 Uramarsite! (NH4,H3O)2(UO2)2(AsO4,PO4)2•6H2O P 4/mmm 4/m 2/m 2/m

Strunz Class:

08.EB.15 08 - PHOSPHATES, ARSENATES, VANADATES

08.E - Uranyl Phosphates and Arsenates

08.EB -UO2:RO4 = 1:1

08.EB.15 Abernathyite K(UO2)(AsO4)•4(H2O) P 4/ncc 4/m 2/m 2/m

08.EB.15 Chernikovite (H3O)2(UO2)2(PO4)2•6(H2O) P 4/nmm 4/m 2/m 2/m

08.EB.15 Meta-ankoleite K2(UO2)2(PO4)2•6(H2O) P 4/nmm 4/m 2/m 2/m

08.EB.15 Natrouranospinite (Na2,Ca)(UO2)2(AsO4)2•5(H2O) P 4/nmm 4/m 2/m 2/m

08.EB.15 Uramphite (NH4)(UO2)(PO4)•3(H2O) P 4/nmm 4/m 2/m 2/m

08.EB.15 Trogerite H2(UO2)2(AsO4)2•8(H2O) P 4/mmm 4/m 2/m 2/m

08.EB.15 Uramarsite! (NH4,H3O)2(UO2)2(AsO4,PO4)2•6H2O P 4/mmm 4/m 2/m 2/m

Other Uramphite 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 Uramphite :
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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Print or Cut-and-Paste your Uramphite Specimen Label here :

Uramphite

(NH4)(UO2)(PO4)•3(H2O)
Dana No: 40.02a.07.01 Strunz No: 08.EB.15
Locality:

Notes: