Mourite Mineral Data

General Mourite Information

Chemical Formula:

U++++Mo++++++5O12(OH)10

Composition:

Molecular Weight = 1,079.80 gm

Uranium 22.04 % U 25.01 % UO₂

Molybdenum 44.43 % Mo 66.65 % MoO₃

Hydrogen 0.93 % H 8.34 % H₂O

Oxygen 32.60 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

UMo₅O₁₂(OH)₁₀

Environment:

U-Mo deposits.

IMA Status:

Approved IMA 1962

Locality:

Unspecified location in Russia. Link to MinDat.org Location Data.

Name Origin:

Named for its composition (Mo, Uranium).

Name Pronunciation:

Mourite

Mourite Image

Images:

Mourite Iriginite

Comments: Purple to violet sub-metallic mourite coatings with yellow iriginite.
Location: 'North Caucasus', probably Kyzylsai Deposit, Chu-Ili Mountains, Balkhash, Zezkazgan, Kazakhstan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Mourite Crystallography

Axial Ratios:

a:b:c =3.4033:1:1.3785

Cell Dimensions:

a = 24.443, b = 7.182, c = 9.901, Z = 4; beta = 102.22° V = 1,698.73 Den(Calc)= 4.22

Crystal System:

Monoclinic Space Group: Pc or P 2/c

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

By Intensity(I/I_o): 5.897(1), 12.77(0.9), 2.871(0.8),

Physical Properties of Mourite

Cleavage:

{100} Good

Color:

Violet.

Density:

4.17 - 4.29, Average = 4.23

Habit:

Fan Shaped - Occurs as radiating crystals shaped like a fan.

Habit:

Fibrous - Crystals made up of fibers.

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Hardness:

3 - Calcite

Luster:

Adamantine

Streak:

blue violet

Optical Properties of Mourite

Gladstone-Dale:

CI meas= 0.116 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.114 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1872,KPDmeas= 0.1868,KC= 0.2113
Ncalc = 1.88 - 1.91

Optical Data:

Biaxial (?), a=1.79

Pleochroism (x):

pale greenish violet.

Pleochroism (z):

dark blue violet.

Calculated Properties of Mourite

Electron Density:

Bulk Density (Electron Density)=3.81 gm/cc
note: Specific Gravity of Mourite =4.22 gm/cc.

Fermion Index:

Fermion Index = 0.11
Boson Index = 0.89

Photoelectric:

PE_Mourite= 628.50 barns/electron
U=PE_Mourite x r_electron=2,397.34 barns/cc.

Radioactivity:

GRapi = 1,698,363.06 (Gamma Ray American Petroleum Institute Units)
Concentration of Mourite per GRapi unit = 588.80 (PPB)

Mourite 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) 17.91 ± 4.48 grams of pure Mourite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 1790.9 ±447.74 grams of pure Mourite .

**Estimated Radioactivity from Mourite** - 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 / 7.68 cm	39,458,572	1.07E-03	1,698,363.06	558.37
100 gm / 3.56 cm	3,945,857	1.07E-04	169,836.31	55.84
10 gm / 1.65 cm	394,586	1.07E-05	16,983.63	5.58
1 gm / 7.68 mm	39,459	1.07E-06	1,698.36	0.56
0.1 gm / 3.56 mm	3,946	1.07E-07	169.84	0.06
0.01 gm / 1.65 mm	395	1.07E-08	16.98	0.01
0.001 gm / 0.77 mm	39	1.07E-09	1.70	0.00

Weight of pure Mourite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.22 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

Mourite Classification

Dana Class:

05.09.04.01 (05)Oxides Containing Uranium and Thorium

(05.09)with a cation charge of 6+ containing Pb or Bi and some water of hydration or hydroxyl

(05.09.04)Dana Group

05.09.04.01 Mourite UMo5O12(OH)10 Pc or P 2/c Mono

Strunz Class:

04.FL.80 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.F - Hydroxides (without V or U)

04.FL -Hydroxides with H2O ï¿½ (OH); sheets of edge-sharing octahedra

04.FL.80 Mourite UMo5O12(OH)10 Pc or P 2/c Mono

Other Mourite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Mourite :
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

Search for Mourite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Mourite :

Ask about Mourite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Mourite Specimen Label here :

Mourite

U++++Mo++++++5O12(OH)10
Dana No: 05.09.04.01 Strunz No: 04.FL.80
Locality:

Notes:

Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.