Ianthinite Mineral Data

Ianthinite Mineral Data
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General Ianthinite Information

Help on Chemical Formula: Chemical Formula: (UO2)•5(UO3)•10(H2O)
Help on Composition: Composition: Molecular Weight = 304.04 gm
   Uranium   78.29 %  U    94.07 % UO3
   Hydrogen   0.66 %  H     5.93 % H2O
   Oxygen    21.05 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: UO2(OH)2
Help on Environment: Environment: Sedimentary uranium deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1924
Help on Locality: Locality: Kasolo, Belgian Congo. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the Greek ianthinos, "violet."
Help on Name Pronunciation: Name Pronunciation: Ianthinite + Pronunciation Say IANTHINITE
Help on Synonym: Synonym: ICSD 84442
  PDF 12-272
 

Ianthinite Image

Click Here for Larger Ianthinite Image in a New Browser Window Images:
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Ianthinite   Schoepite

Comments: Purple to brown resinous ianthinite with yellow schoepite and orange becquerelite.
Location: Colorado Plateau area, Saguache County, Colorado, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ianthinite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.6256:1:2.6488
Help on Cell Dimensions: Cell Dimensions: a = 7.178, b = 11.473, c = 30.39, Z = 26; V = 2,502.71 Den(Calc)= 5.24
Help on Crystal System: Crystal System: Orthorhombic - PyramidalH-M Symbol (mm2) Space Group: P 21cn
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.63(1), 3.24(0.8), 3.81(0.8),
Help on Forms: Forms:

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Drag2 - Resize
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Forms: ( 2 0 1) ( 2 3 0) ( 2 0 3) ( 0 1 1) ( 0 0 1)

Warning: this large pop-up is very compute intensive and may not work well with some computers.
Click Here for Large Ianthinite Structure Window Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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Burns P C , Finch R J , Hawthorne F C , Miller M L , Ewing R C , Journal of Nuclear Materials , 249 (1997) p.199-206, The crystal structure of ianthinite, [U4+2(UO2)4O6(OH)4](H2O)5: a possible, phase for Pu4+ incorporation during the oxidation of spent nuclear fuel, Locality: Shinkolobwe mine, Shaba, southern Congo

 

Physical Properties of Ianthinite

Help on Cleavage: Cleavage: {100} Perfect
Help on Color: Color: Violet black, Violet, Violet purple.
Help on Density: Density: 5.16
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luster: Luster: Sub Metallic
Help on Streak: Streak: violet brown
 

Optical Properties of Ianthinite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.228 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.21 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1587,KPDmeas= 0.1611,KC= 0.1312
Ncalc = 1.68 - 1.69
Help on Optical Data: Optical Data: Biaxial (-), a=1.674, b=1.9, g=1.92, bire=0.2460, 2V(Calc)=30, 2V(Meas)=58.
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): violet.
Help on Pleochroism (z): Pleochroism (z): dark violet.
 

Calculated Properties of Ianthinite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.34 gm/cc
note: Specific Gravity of Ianthinite =5.24 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0057387701
Boson Index = 0.9942612299
Help on Photoelectric: Photoelectric: PEIanthinite =2,142.97 barns/electron
U=PEIanthinite x relectron=9,307.09 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 5,530,898.91 (Gamma Ray American Petroleum Institute Units)
Concentration of Ianthinite per GRapi unit = 180.80 (PPB)

Ianthinite 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) 5.50 ± 1.37 grams of pure Ianthinite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 549.94 ±137.49 grams of pure Ianthinite .

Estimated Radioactivity from Ianthinite - very strong
Specimen
Size
Weight/Volume
(Sphere) *		 Calculated
Activity
Becquerels
(Bq)		 Calculated
Activity
Curies (Ci)		 Estimated
Activity
GR(api)		 Estimated
Exposure
(mRem**)/hr
If Held in Hand
For One Hour
1000 gm / 7.14 cm 140,135,639 3.79E-03 5,530,898.91 1,818.38
100 gm / 3.32 cm 14,013,564 3.79E-04 553,089.89 181.84
10 gm / 1.54 cm 1,401,356 3.79E-05 55,308.99 18.18
1 gm / 7.14 mm 140,136 3.79E-06 5,530.90 1.82
0.1 gm / 3.32 mm 14,014 3.79E-07 553.09 0.18
0.01 gm / 1.54 mm 1,401 3.79E-08 55.31 0.02
0.001 gm / 0.71 mm 140 3.79E-09 5.53 0.00

Weight of pure Ianthinite in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.24 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
 

Ianthinite Classification
Help on Dana Class: Dana Class: 05.06.01.01 (05)Oxides Containing Uranium and Thorium
  (05.06)with polyvalent uranium
  (05.06.01)Dana Group
 
05.06.01.01 Ianthinite (UO2)•5(UO3)•10(H2O) P 21cn mm2
Help on Strunz Class: Strunz Class: 04.GA.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.G - Uranyl Hydroxides
  04.GA -Without additional cations
 
04.GA.10 Ianthinite (UO2)•5(UO3)•10(H2O) P 21cn mm2
 

Other Ianthinite Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Ianthinite :
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

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

Ianthinite

(UO2)•5(UO3)•10(H2O)
Dana No: 05.06.01.01 Strunz No: 04.GA.10
Locality:

 

Notes: