Kobeite-(Y) Mineral Data

Kobeite-(Y) Mineral Data
Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images Share
      News Help About

Advertisment
FEI advanced microscopy and image processing for automated mineralogy workflows are transforming productivity for mining and oil and gas customers by delivering relevant answers when, where, and how they are needed.
Dan Weinrich Auctions
[Mineral Auctions] [Register] [Current Auctions] [Log In] [www.danweinrich.com]
Weinrich Minerals Auctions, Inc
Specializing In Live Weekly Auctions Of Top Quality Mineral Specimens
The Place To Find Great Specimens At Great Prices!

Dakota Matrix was founded in 1996 and has offered systematic and rare mineral specimens online since 1998.

General Kobeite-(Y) Information

Help on Chemical Formula: Chemical Formula: (Y,U)(Ti,Nb)2(O,OH)6 (?)
Help on Composition: Composition: Molecular Weight = 319.10 gm
   Yttrium   25.08 %  Y    31.84 % Y2O3
   Uranium    7.46 %  U     8.46 % UO2
   Titanium  22.51 %  Ti   37.55 % TiO2
   Niobium   14.56 %  Nb   20.83 % Nb2O5
   Hydrogen   0.32 %  H     2.82 % H2O
   Oxygen    30.08 %  O
            ______        ______ 
            100.00 %      101.50 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Y0.9U0.1Ti1.5Nb0.5O5(OH)
Help on Environment: Environment: In granite pegmatites.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1950
Help on Locality: Locality: Kobe-Mura [presently Oyama-cho], Japan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Kobeite-(Y) Say KOBEITE-(Y)
 

Kobeite-(Y) Image

Click Here for Larger Kobeite-(Y) Image in a New Browser Window Images:
Click Here for Larger Kobeite-(Y) Image

Kobeite-(Y)

Comments: Subparallel aggregate of black, tabular, euhedral kobeite-(Y) crystals in matrix.
Location: Ohro, Kobe, Kyoto, Japan. Scale: Picture size 5 mm.
© Paul M. Schumacher

Kobeite-(Y) Crystallography
Help on Cell Dimensions: Cell Dimensions: a = 5.021, Z = 1; V = 126.58 Den(Calc)= 4.19
Help on Crystal System: Crystal System: IsometricSpace Group: Cubic
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.89(1), 1.776(0.8), 1.514(0.7),
 

Physical Properties of Kobeite-(Y)

Help on Cleavage: Cleavage: None
Help on Color: Color: Brown, Brownish black, Dark brown, Black.
Help on Density: Density: 4.6
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Metamict - Mineral originally crystalline, now amorphous due to radiation damage.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luster: Luster: Vitreous - Resinous
Help on Streak: Streak: reddish brown
 

Optical Properties of Kobeite-(Y)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.049 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.044 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2876,KPDmeas= 0.262,KC= 0.2756
Ncalc = 2.15 - 2.27
Help on Optical Data: Optical Data: Isotropic, n=2.205.
 

Calculated Properties of Kobeite-(Y)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.86 gm/cc
note: Specific Gravity of Kobeite-(Y) =4.19 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEKobeite-(Y) = 242.17 barns/electron
U=PEKobeite-(Y) x relectron= 933.62 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 585,029.27 (Gamma Ray American Petroleum Institute Units)
Concentration of Kobeite-(Y) per GRapi unit =1,709.32 (PPB)

Kobeite-(Y) 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) 51.99 ± 13.00 grams of pure Kobeite-(Y) .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 5199.2 ±1299.8 grams of pure Kobeite-(Y) .

Estimated Radioactivity from Kobeite-(Y) - 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 / 7.70 cm 13,352,475 3.61E-04 585,029.27 192.34
100 gm / 3.57 cm 1,335,248 3.61E-05 58,502.93 19.23
10 gm / 1.66 cm 133,525 3.61E-06 5,850.29 1.92
1 gm / 7.70 mm 13,352 3.61E-07 585.03 0.19
0.1 gm / 3.57 mm 1,335 3.61E-08 58.50 0.02
0.01 gm / 1.66 mm 134 3.61E-09 5.85 0.00
0.001 gm / 0.77 mm 13 3.61E-10 0.59 0.00

Weight of pure Kobeite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.19 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
 

Kobeite-(Y) Classification
Help on Dana Class: Dana Class: 08.03.12.01 (08)Multiple Oxides with Nb, Ta, and Ti
  (08.03)where A (B2O6)
  (08.03.12)Dana Group
 
08.03.12.01 Kobeite-(Y) (Y,U)(Ti,Nb)2(O,OH)6(?) Cubic Cubic
Help on Strunz Class: Strunz Class: 04.DG.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.D - Metal:Oxygen = 1:2 and similar
  04.DG -With large (± medium-sized) cations; chains of edge-sharing octahedra
 
04.DG.05 Fersmite (Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6 Pcan 2/m 2/m 2/m
 
04.DG.05 Euxenite-(Y) (Y,Ca,Ce)(Nb,Ta,Ti)2O6 Pcan 2/m 2/m 2/m
 
04.DG.05 Kobeite-(Y) (Y,U)(Ti,Nb)2(O,OH)6(?) Cubic Cubic
 
04.DG.05 Loranskite-(Y) (Y,Ce,Ca)ZrTaO6(?) Unk Ortho
 
04.DG.05 Polycrase-(Y) (Y,Ca,Ce,U,Th)(Ti,Nb,Ta)2O6 Pcan 2/m 2/m 2/m
 
04.DG.05 Tanteuxenite-(Y) (Y,Ce,Ca)(Ta,Nb,Ti)2(O,OH)6 Pcan 2/m 2/m 2/m
 
04.DG.05 Uranopolycrase (U,Y)(Ti,Nb,Ta)2O6 P bcn 2/m 2/m 2/m
 
04.DG.05 Yttrocrasite-(Y) (Y,Th,Ca,U)(Ti,Fe)2(O,OH)6 Unk Ortho
 

Other Kobeite-(Y) Information
Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(AntBidBlaNic3) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Kobeite-(Y) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

Search for Kobeite-(Y) using:

Google
 
Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Kobeite-(Y) :

B and L Fine Minerals Google Search for Kobeite-(Y)
Dakota Matrix Minerals Google Search for Kobeite-(Y)
Dan & Diana Weinrich Mineral Auctions Google Search for Kobeite-(Y)
Excalibur Mineral Corp. Google Search for Kobeite-(Y)
FEI QEMSCAN SEM Website Link
FEI Natural Resources Website Link
John Betts Fine Minerals Google Search for Kobeite-(Y)
McDougall Minerals Google Search for Kobeite-(Y)
Mineral News Website Link
Mineral of the Month Club Google Search for Kobeite-(Y)
Rockeeper Website Link
Weinrich Minerals, Inc. Google Search for Kobeite-(Y)
Wright's Rock Shop Google Search for Kobeite-(Y)

Ask about Kobeite-(Y) here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Kobeite-(Y) Specimen Label here :

Kobeite-(Y)

(Y,U)(Ti,Nb)2(O,OH)6 (?)
Dana No: 08.03.12.01 Strunz No: 04.DG.05
Locality:

 

Notes: