Mundite Mineral Data

General Mundite Information

Chemical Formula:

Al(UO2)3(PO4)2(OH)3•5(H2O)

Composition:

Molecular Weight = 1,168.11 gm

Uranium 61.13 % U 69.35 % UO₂

Aluminum 2.31 % Al 4.36 % Al₂O₃

Phosphorus 5.30 % P 12.15 % P₂O₅

Hydrogen 1.12 % H 10.02 % H₂O

Oxygen 30.13 % O

______ ______

100.00 % 95.89 % = TOTAL OXIDE

Empirical Formula:

Al(UO₂)₃(PO₄)₂(OH)₃•5(H₂O)

IMA Status:

Approved IMA 1981

Locality:

Kobokobo, Kivu, Zaire. Link to MinDat.org Location Data.

Name Origin:

Named for Walter Mund (1892-1956), radiochemist, University of Louvain, Belgium.

Name Pronunciation:

Mundite

Mundite Image

Images:

Mundite

Comments: Bright yellow crystalline mundite grains.
Location: Kobokobo, Sud-Kivu, Zaire. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Mundite Crystallography

Axial Ratios:

a:b:c =0.5513:1:0.4441

Cell Dimensions:

a = 17.08, b = 30.98, c = 13.76, Z = 16; V = 7,280.94 Den(Calc)= 4.26

Crystal System:

Orthorhombic Space Group: P 2₁cn,Pmcn

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

By Intensity(I/I_o): 7.8(1), 3.37(0.7), 3.87(0.6),

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Physical Properties of Mundite

Cleavage:

{010} Perfect, {100} Perfect, {001} Perfect

Color:

Golden yellow, Light yellow.

Density:

4.295

Diaphaneity:

Translucent

Hardness:

2-3 - Gypsum-Calcite

Streak:

white

Optical Properties of Mundite

Gladstone-Dale:

CI meas= -0.147 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.156 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1557,KPDmeas= 0.1544,KC= 0.1347
Ncalc = 1.57 - 1.58

Optical Data:

Biaxial (-), a=1.62, b=1.682, g=1.688, bire=0.0680, 2V(Calc)=32, 2V(Meas)=33.

Pleochroism (x):

weak yellow.

Pleochroism (y):

weak yellow.

Pleochroism (z):

weak yellow.

Calculated Properties of Mundite

Electron Density:

Bulk Density (Electron Density)=3.74 gm/cc
note: Specific Gravity of Mundite =4.30 gm/cc.

Fermion Index:

Fermion Index = 0.0045478273
Boson Index = 0.9954521727

Photoelectric:

PE_Mundite=1,594.96 barns/electron
U=PE_Mundite x r_electron=5,958.34 barns/cc.

Radioactivity:

GRapi = 4,532,251.93 (Gamma Ray American Petroleum Institute Units)
Concentration of Mundite per GRapi unit = 220.64 (PPB)

Mundite 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) 6.71 ± 1.68 grams of pure Mundite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 671.12 ±167.78 grams of pure Mundite .

**Estimated Radioactivity from Mundite** - 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 / 7.63 cm	109,426,322	2.96E-03	4,532,251.93	1,490.06
100 gm / 3.54 cm	10,942,632	2.96E-04	453,225.19	149.01
10 gm / 1.64 cm	1,094,263	2.96E-05	45,322.52	14.90
1 gm / 7.63 mm	109,426	2.96E-06	4,532.25	1.49
0.1 gm / 3.54 mm	10,943	2.96E-07	453.23	0.15
0.01 gm / 1.64 mm	1,094	2.96E-08	45.32	0.01
0.001 gm / 0.76 mm	109	2.96E-09	4.53	0.00

Weight of pure Mundite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.30 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

Mundite Classification

Dana Class:

42.07.13.01 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.07)where (AB)5 (XO4)3 Zq ï¿½ x(H2O)

(42.07.13)Dana Group

42.07.13.01 Mundite Al(UO2)3(PO4)2(OH)3•5(H2O) P 2₁cn,Pmcn Ortho

Strunz Class:

08.EC.30 08 - PHOSPHATES, ARSENATES, VANADATES

08.E - Uranyl Phosphates and Arsenates

08.EC -UO2:RO4 = 3:2

08.EC.30 Mundite Al(UO2)3(PO4)2(OH)3•5(H2O) P 2₁cn,Pmcn Ortho

Other Mundite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Mundite :
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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Mundite

Al(UO2)3(PO4)2(OH)3•5(H2O)
Dana No: 42.07.13.01 Strunz No: 08.EC.30
Locality:

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