Mourite Mineral Data +

B & L Fine Minerals

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).
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:	MonoclinicSpace Group: Pc or P 2/c
X Ray Diffraction:	By Intensity(I/Io): 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
Optical Data:	Biaxial (?), a=1.79
Pleochroism (x):	pale greenish violet.
Pleochroism (z):	dark blue violet.
Calculated Properties of Mourite
Electron Density:	relectron=3.81 gm/cc note: rMourite =4.22 gm/cc.
Fermion Index	Fermion Index = 0.11489 Boson Index = 0.88511
Photoelectric:	PEMourite = 628.50 barns/electron U=PEMourite x relectron=2,397.34 barns/cc.
Radioactivity:	GRapi = 1,698,362.24 (Gamma Ray American Petroleum Institute Units) 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 39,458,563 1.07E-03 1,698,362.24 558.37 100 gm / 3.56 cm 3,945,856 1.07E-04 169,836.22 55.84 10 gm / 1.65 cm 394,586 1.07E-05 16,983.62 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:	5.9.4.1 (5)Oxides Containing Uranium and Thorium
	(5.9)with a cation charge of 6+ containing Pb or Bi and some water of hydration or hydroxyl
	(5.9.4)Dana Group
	5.9.4.1 Mourite UMo5O12(OH)10 Pc or P 2/c Mono
Strunz Class:	VI/G.05-10 VI - Sulfates,Chromates,Molybdates and Tungstates
	VI/G - Uranylmolybdates with [UO2]4+ - [MoO4]2-
	VI/G.05 - Mourite - Moluranite series
	VI/G.05-10 Mourite UMo5O12(OH)10 Pc or P 2/c Mono
	VI/G.05-20 Umohoite [(UO2)MoO4]·H2O P1 1
	VI/G.05-30 Moluranite H4U(UO2)3(MoO4)7·18(H2O) None
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 -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 Search for Mourite using:   Web webmineral.com [ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO] Visit our Advertisers for Mourite : AA Mineral Specimens B & L Fine Minerals Crystal Vaults Dan Weinrich Fine Minerals Dan Weinrich Auctions e-Rocks Auctions Excalibur Minerals Exceptional Minerals Fabre Minerals Greenside Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club MineralsWeb Fine Minerals Rockshop.cz T G Fine Minerals Wrights Rock Shop Translate Mourite Mineral Data : 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: 5.9.4.1 Strunz No: VI/G.05-10 Locality:   Notes: