Mineralogy Database

Ashanite Mineral Data

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General Ashanite Information

Help on Chemical  Formula: Chemical Formula: (Nb,Ta,U,Fe,Mn)4O8
Help on Composition: Composition: Molecular Weight = 574.20 gm
   La,Ce,Pr,Nd,Sm,   2.51 %  RE    2.93 % REE2O3
   Uranium          20.73 %  U    23.51 % UO2
   Tantalum         18.91 %  Ta   23.09 % Ta2O5
   Manganese         2.87 %  Mn    3.71 % MnO
   Niobium          25.89 %  Nb   37.03 % Nb2O5
   Iron              6.81 %  Fe    8.76 % FeO
   Oxygen           22.29 %  O
                   ______        ______ 
                   100.00 %       99.02 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Nb1.6Fe2+0.7Mn2+0.3Ta0.6U0.5REE0.1O8
Help on Environment: Environment: In the central part of pegmatite in albitized two-mica granite.
Help on IMA Status: IMA Status: Discredited IMA 1998
Help on Locality: Locality: From an undefined locality in the Altai Mountains, Sinkiang Uighur Autonomous Province, northwestern China. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From Altai and SHAN, Chinese for "mountains," for the occurrence in the Altai Mountains, China.
Help on Name Pronunciation: Name Pronunciation: Ashanite Say ASHANITE
Help on Synonym: Synonym: Discredited
 

Ashanite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.2043:1:1.0703
Help on Cell Dimensions: Cell Dimensions: a = 5.869, b = 4.873, c = 5.216, Z = 1; V = 149.18 Den(Calc)= 6.39
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pcan
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.95(1), 3.65(0.5), 2.51(0.3),
 

Physical Properties of Ashanite

Help on Cleavage: Cleavage: None
Help on Color: Color: Dark brown, Black.
Help on Density: Density: 6.61
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Hardness: Hardness: 6-6.5 - Orthoclase-Pyrite
Help on Luster: Luster: Sub Metallic
Help on Streak: Streak: brown
 

Optical Properties of Ashanite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.105 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.144 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2118,KPDmeas= 0.2047,KC= 0.1852
Ncalc = 2.18 - 2.22
Help on Optical Data: Optical Data: Biaxial (+), a=2.31, b=2.35, g=2.4, bire=0.0900, 2V(Calc)=86, 2V(Meas)=70-75.
Help on Pleochroism (x): Pleochroism (x): light brownish red.
Help on Pleochroism (z): Pleochroism (z): dark brownish red.
Help on RL Color: RL Color: Pale bluish gray.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Ashanite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 440 nm   12.10   12.10 
   
 460 nm   11.40   11.50 
 480 nm   11.20   11.30 
 500 nm   11.00   11.00 
 520 nm   11.00   11.00 
 540 nm   10.90   10.90 
 560 nm   10.90   10.80 
 580 nm   10.80   10.80 
 600 nm   10.80   10.70 
 620 nm   10.70   10.70 
 640 nm   10.70   10.60 
 660 nm   10.60   10.60 
 680 nm   10.60   10.60 
 700 nm   10.60   10.60 
Calculated Relative Intensity Colors of Ashanite in Air
Relative
Intensity
   0%   90% 100% 180% 270% 360% 450% 540% 630% 720% 810% 820%
R1                        
R2                        
 

Calculated Properties of Ashanite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.78 gm/cc
note: Specific Gravity of Ashanite =6.61 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0077313074
Boson Index = 0.9922686926
Help on Photoelectric: Photoelectric: PEAshanite = 821.10 barns/electron
U=PEAshanite x relectron=4,748.80 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 1,548,145.27 (Gamma Ray American Petroleum Institute Units)
Concentration of Ashanite per GRapi unit = 645.93 (PPB)

Ashanite 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) 19.65 ± 4.91 grams of pure Ashanite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 1964.7 ±491.18 grams of pure Ashanite .

Estimated Radioactivity from Ashanite - 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 / 6.61 cm 37,157,524 1.00E-03 1,548,145.27 508.98
100 gm / 3.07 cm 3,715,752 1.00E-04 154,814.53 50.90
10 gm / 1.42 cm 371,575 1.00E-05 15,481.45 5.09
1 gm / 6.61 mm 37,158 1.00E-06 1,548.15 0.51
0.1 gm / 3.07 mm 3,716 1.00E-07 154.81 0.05
0.01 gm / 1.42 mm 372 1.00E-08 15.48 0.01
0.001 gm / 0.66 mm 37 1.00E-09 1.55 0.00

Weight of pure Ashanite in grams (gm) and Calculated Diameter of a Sphere with a Density of 6.61 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
Estimated Thorium Activity ( 0.13 % Th) From Sum REE Elements ( 2.51 % REE)
 

Ashanite Classification

Help on  Dana Class: Dana Class: 04.00.00.00 (04)Oxide Minerals
  (04.00)Without Dana Classification Numbers
  (04.00.00)Oxide
 
04.00.00.00 Ashanite? (Nb,Ta,U,Fe,Mn)4O8 Pcan 2/m 2/m 2/m
 
04.00.00.00 Chubutite* Pb7O6Cl2 Unk Ortho
 
04.00.00.00 Clinobirnessite* Na4Mn14O27•9(H2O) Mono
 
04.00.00.00 Donathite? (Fe,Mg)(Cr,Fe)2O4 P 4/nnm 4/m 2/m 2/m
 
04.00.00.00 IMA2008-022 UO2(OH)2 pseudo-orthorhombic Mono
 
04.00.00.00 Krasnogorite* WO3 Pmnb 2/m 2/m 2/m
 
04.00.00.00 Mengxianminite* (Ca,Na)3(Fe,Mn)2Mg2(Sn,Zn)5Al8O29 Unk Ortho
 
04.00.00.00 Romanite* (Fe,U,Pb)2(Ti,Fe)O4 Trig ? Trig
 
04.00.00.00 Tantalowodginite* (Mn2,[])4Ta4Ta8O32 C 2/c 2/m
 
04.00.00.00 Ungursaite* NaCa5(Ta,Nb)24O65(OH) P 63/m,P 63 Hex
 
04.00.00.00 Wolframoixiolite* (Fe,Mn,Nb)(Nb,W,Ta)O4 Pc m
Help on  Strunz Class: Strunz Class: 04.XX.00 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.X - Unclassified Strunz OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, telluri
  04.XX -Oxide
 
04.XX.00 Ashanite? (Nb,Ta,U,Fe,Mn)4O8 Pcan 2/m 2/m 2/m
 
04.XX.00 Methane hydrate-I! 46(H2O)•2(S)•6(L) P m3n 4/m 3 2/m
 
04.XX.00 Clinobirnessite* Na4Mn14O27•9(H2O) Mono
 
04.XX.00 Chubutite* Pb7O6Cl2 Unk Ortho
 
04.XX.00 Kleberite* FeTi6O13•4(H2O)(?) P 63mcm ? 6mm
 
04.XX.00 Hongquiite* TiO F m3m 4/m 3 2/m
 
04.XX.00 Psilomelane? (Ba,H2O)2Mn5O10 A2/m 2/m
 
04.XX.00 Struverite? (Ti,Ta,Fe)O2 P 4/mnm 4/m 2/m 2/m
 
04.XX.00 Ungursaite* NaCa5(Ta,Nb)24O65(OH) P 63/m,P 63 Hex
 
04.XX.00 Uhligite? Ca3(Ti,Al,Zr)9O20 Unk Cubic
 
04.XX.00 Scheteligite? (Ca,Y,Sb,Mn)2(Ti,Ta,Nb,W)2O6(O,OH) Unk Ortho
 
04.XX.00 Allendeite! Sc4Zr3O12 R 3 3
 
04.XX.00 IMA2000-016! (Ti,Fe,Mg,Mn)1-xTi2O5 Pban 2/m 2/m 2/m
 
04.XX.00 Methane hydrate-II! 136(H2O)•16(S)•8(L) F d3m 4/m 3 2/m
 
04.XX.00 IMA2000-026! (Mn,Li)4(Ta,Sn)4(Ta,Nb)8O32 C 2/c 2/m
 
04.XX.00 Methane hydrate-H! 34(H2O)•3(S)•2(M)•1(L) P 6/mmm 6/m 2/m 2/m
 

Other Ashanite Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Ashanite :
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 Ashanite Specimen Label here :

Ashanite

(Nb,Ta,U,Fe,Mn)4O8
Dana No: 04.00.00.00 Strunz No: 04.XX.00
Locality:

 

Notes:

 

 
   
 


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