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Tyuyamunite Mineral Data

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General Tyuyamunite Information

Help on Chemical  Formula: Chemical Formula: Ca(UO2)2V2O8•5-8(H2O)
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Ca(UO2)2(VO4)2•6(H2O)
Help on Environment: Environment: Colorado Plateau U-V sandstone deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1912
Help on Locality: 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.
Help on Name Origin: Name Origin: Named from its locality.
Help on Name Pronunciation: Name Pronunciation: Tyuyamunite + Pronunciation Say TYUYAMUNITE
Help on Synonym: Synonym: Calciocarnotite

Tyuyamunite Image

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

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  Grantsite   Tyuyamunite

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

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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

Help on Axial Ratios: Axial Ratios: a:b:c =1.2392:1:2.4401
Help on Cell Dimensions: Cell Dimensions: a = 10.36, b = 8.36, c = 20.4, Z = 4; V = 1,766.84 Den(Calc)= 3.45
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnan
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 10.18(1), 5.02(0.9), 3.2(0.5),

Physical Properties of Tyuyamunite

Help on Cleavage: Cleavage: {001} Perfect, {010} Distinct, {100} Distinct
Help on Color: Color: Greenish yellow, Yellow.
Help on Density: Density: 3.3 - 4.3, Average = 3.8
Help on Diaphaneity: Diaphaneity: Translucent to Opaque
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Scaly - Morphology like fish scales.
Help on Hardness: Hardness: 1.5-2 - Talc-Gypsum
Help on Luminescence: Luminescence: Fluorescent, Short UV=weak yellow-green, Long UV=weak yellow-green.
Help on Luster: Luster: Adamantine - Pearly
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: light yellow

Optical Properties of Tyuyamunite

Help on Gladstone-Dale: 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
Ncalc = 1.59 - 1.77
Help on Optical Data: 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.
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): pale canary yellow.
Help on Pleochroism (z): Pleochroism (z): canary yellow.

Calculated Properties of Tyuyamunite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.36 gm/cc
note: Specific Gravity of Tyuyamunite =3.80 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.004222268
Boson Index = 0.995777732
Help on Photoelectric: Photoelectric: PETyuyamunite =1,333.06 barns/electron
U=PETyuyamunite x relectron=4,480.22 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 3,909,006.33 (Gamma Ray American Petroleum Institute Units)
Concentration of Tyuyamunite per GRapi unit = 255.82 (PPB)

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
Curies (Ci)
If Held in Hand
For One Hour
1000 gm / 7.95 cm 92,815,643 2.51E-03 3,909,006.33 1,285.15
100 gm / 3.69 cm 9,281,564 2.51E-04 390,900.63 128.52
10 gm / 1.71 cm 928,156 2.51E-05 39,090.06 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

Help on  Dana Class: Dana Class: 40.02a.26.01 (40)Hydrated Phosphates, etc
  (40.02a)where A++ (B++)2 (XO4) � x(H2O), containing (UO2)++
  (40.02a.26)Dana Group
40.02a.26.01 Tyuyamunite Ca(UO2)2V2O8•5-8(H2O) Pnan 2/m 2/m 2/m
40.02a.26.02 Metatyuyamunite Ca(UO2)2V2O8•3(H2O) Pnam 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 04.HB.25 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.H - V[5,6] Vanadates
  04.HB -Uranyl Sorovanadates
04.HB.25 Metatyuyamunite Ca(UO2)2V2O8•3(H2O) Pnam 2/m 2/m 2/m
04.HB.25 Tyuyamunite Ca(UO2)2V2O8•5-8(H2O) Pnan 2/m 2/m 2/m

Other Tyuyamunite Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Tyuyamunite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - Uranium Minerals

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Dana No: 40.02a.26.01 Strunz No: 04.HB.25





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