Metatyuyamunite Mineral Data

Metatyuyamunite Mineral Data +

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General Metatyuyamunite Information

Chemical Formula:

Ca(UO2)2V2O8·3(H2O)

Composition:

Molecular Weight = 864.06 gm

Calcium 4.64 % Ca 6.49 % CaO

Uranium 55.10 % U 62.50 % UO₂

Vanadium 11.79 % V 21.05 % V₂O₅

Hydrogen 0.70 % H 6.25 % H₂O

Oxygen 27.77 % O

______ ______

100.00 % 96.30 % = TOTAL OXIDE

Empirical Formula:

Ca(UO₂)₂V⁵⁺₂O₈·3(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1950

Locality:

Jo Dandy mine, Paradox Valley, Montrose Co., Colorado, USA Link to MinDat.org Location Data.

Name Origin:

Named as the lower hydrate of tyuyamunite.

Metatyuyamunite Image

Images:

Metatyuyamunite

Comments: Bright yellow bladed crystals of metatyuyamunite.
Location: Mashamba mine, Kolwezi, Shaba, Democratic Republic of the Congo. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Images:

Metatyuyamunite Metatorbernite

Comments: Yellow, platy metatyuyamunite and transparent, tabular green metatorbernite crystals with a minor amount of white, snowy-looking saleeite.
Location: Mashamba West Mine, Kolwezi, Shaba (Katanga), Congo (Za?re). Scale: Picture size 0.5 cm.
© Paul M. Schumacher

Metatyuyamunite Crystallography

Axial Ratios:

a:b:c =1.2414:1:2.0424

Cell Dimensions:

a = 10.54, b = 8.49, c = 17.34, Z = 4; V = 1,551.66 Den(Calc)= 3.70

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pnam

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

By Intensity(I/I_o): 8.51(1), 4.22(0.8), 3.26(0.6),

Physical Properties of Metatyuyamunite

Cleavage:

[001] Perfect, [101] Distinct, [100] Distinct

Color:

Greenish yellow, Yellow, Yellow green, Dark green.

Density:

3.8 - 3.9, Average = 3.84

Hardness:

2 - Gypsum

Luster:

Subadamantine

Streak:

light yellow

Optical Properties of Metatyuyamunite

Gladstone-Dale:

CI meas= -0.22 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.269 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2144,KPDmeas= 0.2061,KC= 0.169

Optical Data:

Biaxial (-), a=1.68, b=1.835, g=1.865, bire=0.1850, 2V(Calc)=44, 2V(Meas)=45.

Calculated Properties of Metatyuyamunite

Electron Density:

r_electron=3.35 gm/cc
note: r_{Metatyuyamunite}=3.85 gm/cc.

Fermion Index

Fermion Index = 0.00445
Boson Index = 0.99555

Photoelectric:

PE_{Metatyuyamunite}=1,439.40 barns/electron
U=PE_{Metatyuyamunite} x r_electron=4,822.99 barns/cc.

Radioactivity:

GRapi = 4,087,198.84 (Gamma Ray American Petroleum Institute Units)

Metatyuyamunite 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) 7.44 ± 1.86 grams of pure Metatyuyamunite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 744.19 ±186.05 grams of pure Metatyuyamunite .

**Estimated Radioactivity from Metatyuyamunite** - 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 / 7.92 cm	98,621,142	2.67E-03	4,087,198.84	1,343.74
100 gm / 3.67 cm	9,862,114	2.67E-04	408,719.88	134.37
10 gm / 1.71 cm	986,211	2.67E-05	40,871.99	13.44
1 gm / 7.92 mm	98,621	2.67E-06	4,087.20	1.34
0.1 gm / 3.67 mm	9,862	2.67E-07	408.72	0.13
0.01 gm / 1.71 mm	986	2.67E-08	40.87	0.01
0.001 gm / 0.79 mm	99	2.67E-09	4.09	0.00

Weight of pure Metatyuyamunite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.85 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

Metatyuyamunite Classification

Dana Class:

40.2a.26.2 (40)Hydrated Phosphates, etc

(40.2a)where A++ (B++)2 (XO4) · x(H2O), containing (UO2)++

(40.2a.26)Dana Group

40.2a.26.1 Tyuyamunite Ca(UO2)2V2O8·5-8(H2O) Pnan 2/m 2/m 2/m

40.2a.26.2 Metatyuyamunite Ca(UO2)2V2O8·3(H2O) Pnam 2/m 2/m 2/m

Strunz Class:

VII/E.11-90 VII - Phosphates, Arsenates and Vanadates

VII/E - Uranylphosphates and uranylvanadates with: [UO2]2+ - [PO4 | AsO4]3- and [UO2]2+ - [V2O8]6-, uranyl-groupvanadates with [UO2]2+ - [V2O8]6-

VII/E.11 - Tyuyamunite series

VII/E.11-10 Vanuralite Al(UO2)2(VO4)2(OH)·11(H2O) A2/a 2/m

VII/E.11-20 Metavanuralite Al(UO2)2(VO4)2(OH)·8(H2O) P 1or P1 Tri

VII/E.11-30 Sengierite Cu2(UO2)2V2O8·6(H2O) P 2₁/a 2/m

VII/E.11-40 Strelkinite Na2(UO2)2V2O8·6(H2O) Pnmm,Pnm2 Ortho

VII/E.11-50 Carnotite K2(UO2)2V2O8·3(H2O) P 2₁/a 2/m

VII/E.11-60 Margaritasite (Cs,K,H3O)2(UO2)2V2O8·(H2O) P 2₁/a 2/m

VII/E.11-70 Vanuranylite? (H3O,Ba,Ca,K)1.6(UO2)2V2O8·4(H2O)(?) C 2/c ? 2/m

VII/E.11-80 Tyuyamunite Ca(UO2)2V2O8·5-8(H2O) Pnan 2/m 2/m 2/m

VII/E.11-90 Metatyuyamunite Ca(UO2)2V2O8·3(H2O) Pnam 2/m 2/m 2/m

VII/E.11-100 Francevillite (Ba,Pb)(UO2)2V2O8·5(H2O) Pcan 2/m 2/m 2/m

VII/E.11-110 Curienite Pb(UO2)2V2O8·5(H2O) Pcan 2/m 2/m 2/m

Other Metatyuyamunite 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 Metatyuyamunite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris

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Metatyuyamunite

Ca(UO2)2V2O8·3(H2O)
Dana No: 40.2a.26.2 Strunz No: VII/E.11-90
Locality:

Notes: