Tyuyamunite Mineral Data

Tyuyamunite Mineral Data +

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General Tyuyamunite Information

Chemical Formula:

Ca(UO2)2V2O8·5-8(H2O)

Composition:

Molecular Weight = 918.10 gm

Calcium 4.37 % Ca 6.11 % CaO

Uranium 51.85 % U 58.82 % UO₂

Vanadium 11.10 % V 19.81 % V₂O₅

Hydrogen 1.32 % H 11.77 % H₂O

Oxygen 31.37 % O

______ ______

100.00 % 96.51 % = TOTAL OXIDE

Empirical Formula:

Ca(UO₂)₂(VO₄)₂·6(H₂O)

Environment:

Colorado Plateau U-V sandstone deposits.

IMA Status:

Valid Species (Pre-IMA) 1912

Locality:

Found in the Tyuya-Muyun (Tuja Mujun) hill, a northern spur of the Alai Mountains, Ferghana, in Turkestan. Link to MinDat.org Location Data.

Name Origin:

Named from its locality.

Synonym:

Calciocarnotite

Tyuyamunite Image

Images:

Tyuyamunite

Comments: Yellow tyuyamunite crystals 1 mm in size.
Location: Marie Mine, Carbon Co., Montana. USA. Scale: picture size 2 cm..
© John Veevaert

Images:

Tyuyamunite Grantsite

Comments: Dark olive green waxy coatings of grantsite with greenish-yellow tyuyamunite and sandstone.
Location: F-33 Mine, near Grants, Valencia County, New Mexico, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Tyuyamunite

Comments: Bright yellow rosette crystals of tyuyamunite on matrix.
Location: Marie mine, Carbon County, Montana, USA. Scale: Rosette size 0.5 mm.
© Tom Loomis / Dakota Matrix

Tyuyamunite Crystallography

Axial Ratios:

a:b:c =1.2392:1:2.4401

Cell Dimensions:

a = 10.36, b = 8.36, c = 20.4, Z = 4; V = 1,766.84 Den(Calc)= 3.45

Crystal System:

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

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

By Intensity(I/I_o): 10.18(1), 5.02(0.9), 3.2(0.5),

Physical Properties of Tyuyamunite

Cleavage:

[001] Perfect, [010] Distinct, [100] Distinct

Color:

Greenish yellow, Yellow.

Density:

3.3 - 4.3, Average = 3.8

Diaphaniety:

Translucent to Opaque

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).

Habit:

Platy - Sheet forms (e.g. micas).

Habit:

Scaly - Morphology like fish scales.

Hardness:

1.5-2 - Talc-Gypsum

Luminescence:

None.

Luster:

Adamantine - Pearly

Magnetism:

Nonmagnetic

Streak:

light yellow

Optical Properties of Tyuyamunite

Gladstone-Dale:

CI meas= -0.245 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.371 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2455,KPDmeas= 0.2229,KC= 0.179

Optical Data:

Biaxial (-), a=1.72, b=1.868, g=1.953, bire=0.2330, 2V(Calc)=68, 2V(Meas)=48. Dispersion r < v weak.

Pleochroism (x):

colorless.

Pleochroism (y):

pale canary yellow.

Pleochroism (z):

canary yellow.

Calculated Properties of Tyuyamunite

Electron Density:

r_electron=3.36 gm/cc
note: r_Tyuyamunite=3.80 gm/cc.

Fermion Index

Fermion Index = 0.00422
Boson Index = 0.99578

Photoelectric:

PE_Tyuyamunite=1,333.06 barns/electron
U=PE_Tyuyamunite x r_electron=4,480.22 barns/cc.

Radioactivity:

GRapi = 3,909,005.16 (Gamma Ray American Petroleum Institute Units)

Tyuyamunite 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) 7.78 ± 1.95 grams of pure Tyuyamunite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 778.12 ±194.53 grams of pure Tyuyamunite .

**Estimated Radioactivity from Tyuyamunite** - 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 / 7.95 cm	92,815,635	2.51E-03	3,909,005.16	1,285.15
100 gm / 3.69 cm	9,281,564	2.51E-04	390,900.52	128.52
10 gm / 1.71 cm	928,156	2.51E-05	39,090.05	12.85
1 gm / 7.95 mm	92,816	2.51E-06	3,909.01	1.29
0.1 gm / 3.69 mm	9,282	2.51E-07	390.90	0.13
0.01 gm / 1.71 mm	928	2.51E-08	39.09	0.01
0.001 gm / 0.80 mm	93	2.51E-09	3.91	0.00

Weight of pure Tyuyamunite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.80 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

Tyuyamunite Classification

Dana Class:

40.2a.26.1 (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.11-80 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 Tyuyamunite Information

References:

NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

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

Tyuyamunite

Ca(UO2)2V2O8·5-8(H2O)
Dana No: 40.2a.26.1 Strunz No: VII/E.11-80
Locality:

Notes: