Mineralogy Database

Uramarsite Mineral Data

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General Uramarsite Information

Help on Chemical  Formula: Chemical Formula: (NH4,H3O)2(UO2)2(AsO4,PO4)2•6H2O
Help on Composition: Composition: Molecular Weight = 935.42 gm
   Sodium       0.22 %  Na    0.30 % Na2O
   Uranium     51.40 %  U    58.31 % UO2
   Arsenic      9.77 %  As   14.99 % As2O5
   Phosphorus   2.58 %  P     5.92 % P2O5
   Hydrogen     0.50 %  H      -   % Calc as (NH4)2O
   Hydrogen     1.55 %  H    13.83 % H2O
   Nitrogen     1.72 %  N     3.20 % (NH4)2O
   Oxygen      32.26 %  O
              ______        ______ 
              100.00 %       96.54 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: (NH4)1.15(H3O)0.72(Na)0.09(UO2)2.022(As)0.612(P)0.39
Help on Environment: Environment: Discovered in the supergene zone of the Bota-Burum U-Mo deposit. Meta-autunite group. Arsenate analog of uramphite.
Help on IMA Status: IMA Status: Approved IMA 2005 (Dana # Added)
Help on Locality: Locality: Bota-Burum uranium deposit, Kazakhstan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its composition of uranium, ammonium, and arsenic.
Help on Synonym: Synonym: IMA2005-043
 

Uramarsite Image

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  Uramarsite

Comments: Brownish green cleavage fragment or uramarsite, co-type material.
Location: Bota-Burum Uranium deposit, Kazakhstan. Scale: See Image.
© Rruff Database

Uramarsite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.2726
Help on Cell Dimensions: Cell Dimensions: a = 7.19, c = 9.15, Z = 1; V = 473.02 Den(Calc)= 3.28
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: P 4/mmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.27(1), 4.85(0.25), 2.28(0.2),3.86(0.2), 2.8(0.13), 1.823(0.08), 1.713(0.07), 2.076(0.06),
 

Physical Properties of Uramarsite

Help on Cleavage: Cleavage: {001} Perfect, {010} Imperfect
Help on Color: Color: Pale green.
Help on Density: Density: 3.22
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luminescence: Luminescence: Fluorescent and radioactive, Short UV=green, Long UV=green.
Help on Luster: Luster: Vitreous - Dull
Help on Streak: Streak: white
 

Optical Properties of Uramarsite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.283 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.26 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1776,KPDmeas= 0.181,KC= 0.141
Ncalc = 1.45 - 1.46
Help on Optical Data: Optical Data: Biaxial (-), a=1.562, b=1.593, g=1.593, bire=0.0310, 2V(Calc)=0, 2V(Meas)=< 5. Dispersion no dispersion.
 

Calculated Properties of Uramarsite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.92 gm/cc
note: Specific Gravity of Uramarsite =3.28 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEUramarsite =1,316.28 barns/electron
U=PEUramarsite x relectron=3,846.36 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 3,903,333.92 (Gamma Ray American Petroleum Institute Units)
Concentration of Uramarsite per GRapi unit = 256.19 (PPB)

Uramarsite 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) 7.79 ± 1.95 grams of pure Uramarsite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 779.25 ±194.81 grams of pure Uramarsite .

Estimated Radioactivity from Uramarsite - 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 / 8.35 cm 92,008,557 2.49E-03 3,903,333.92 1,283.29
100 gm / 3.88 cm 9,200,856 2.49E-04 390,333.39 128.33
10 gm / 1.80 cm 920,086 2.49E-05 39,033.34 12.83
1 gm / 8.35 mm 92,009 2.49E-06 3,903.33 1.28
0.1 gm / 3.88 mm 9,201 2.49E-07 390.33 0.13
0.01 gm / 1.80 mm 920 2.49E-08 39.03 0.01
0.001 gm / 0.84 mm 92 2.49E-09 3.90 0.00

Weight of pure Uramarsite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.28 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
 

Uramarsite Classification

Help on  Dana Class: Dana Class: 40.02a.07.02 (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
Help on  Strunz Class: 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 Uramarsite Information

Help on References: References: NAME( AmMin, v94:205) PHYS. PROP.(AmMin, v94:205) OPTIC PROP.(AmMin, v94:205)
Help on See Also: See Also: Links to other databases for Uramarsite :
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 Uramarsite Specimen Label here :

Uramarsite

(NH4,H3O)2(UO2)2(AsO4,PO4)2•6H2O
Dana No: 40.02a.07.02 Strunz No: 08.EB.15
Locality:

 

Notes:

 

 
   
 


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