Mineralogy Database

Polycrase-(Y) Mineral Data

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General Polycrase-(Y) Information

Help on Chemical  Formula: Chemical Formula: (Y,Ca,Ce,U,Th)(Ti,Nb,Ta)2O6
Help on Composition: Composition: Molecular Weight = 372.96 gm
   Calcium    1.07 %  Ca    1.50 % CaO
   Cerium     3.76 %  Ce    4.40 % Ce2O3
   Yttrium   11.92 %  Y    15.14 % Y2O3
   Thorium    6.22 %  Th    7.08 % ThO2
   Uranium    6.38 %  U     7.67 % UO3
   Tantalum  14.56 %  Ta   17.77 % Ta2O5
   Titanium  15.41 %  Ti   25.70 % TiO2
   Niobium   14.95 %  Nb   21.38 % Nb2O5
   Oxygen    25.74 %  O
            ______        ______ 
            100.00 %      100.64 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Y0.5Ca0.1Ce0.1U0.1Th0.1Ti1.2Nb0.6Ta0.3O6
Help on Environment: Environment: Granitic pegmatites.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1870
Help on Locality: Locality: Rasvag, Hidra (Hittero) Island, near Flekkefjord, and many other places in Norway. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek for "many" and "mixture", in reference to the large number of chemical elements in the formula.
Help on Name Pronunciation: Name Pronunciation: Polycrase-(Y) + Pronunciation Say POLYCRASE-(Y)
Help on Synonym: Synonym: ICSD 89029
  PDF 46-1458 (U)
 

Polycrase-(Y) Image

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  Polycrase-(Y)

Comments: Large, black, blocky polycrase-(Y) crystal.
Location: Hidra, Vest-Agder, Norway. Scale: Crystal size 0.8 X 2.0 cm.
© John Veevaert

Polycrase-(Y) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.3796:1:0.3549
Help on Cell Dimensions: Cell Dimensions: a = 5.55, b = 14.62, c = 5.19, Z = 4; V = 421.12 Den(Calc)= 5.88
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pcan
Help on Forms: Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 0 1 0) ( 2 0 1) ( 1 1 1) ( 1 1 0) ( 1 0 0)

Warning: this java applet does not work in some browsers because of security restrictions.

 

Physical Properties of Polycrase-(Y)

Help on Cleavage: Cleavage: None
Help on Color: Color: Black, Brown.
Help on Density: Density: 4.97 - 5.04, Average = 5
Help on Diaphaneity: Diaphaneity: Subtranslucent to Opaque
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
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 Habit: Habit: Striated - Parallel lines on crystal surface or cleavage face.
Help on Hardness: Hardness: 5-6 - Between Apatite and Orthoclase
Help on Luminescence: Luminescence: Non-fluorescent and radioactive.
Help on Luster: Luster: Vitreous - Resinous
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: brown
 

Optical Properties of Polycrase-(Y)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.035 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.119 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2126,KPDmeas= 0.2498,KC= 0.2412
Ncalc = 2.2 - 2.42
Help on Optical Data: Optical Data: Isotropic, n=2.25.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Polycrase-(Y) in Air
λ R  ∑ R(λ) 
 470 nm   15.60   
 546 nm   14.60 
 589 nm   13.40 
 650 nm   13.90 
Calculated Relative Intensity Colors of Polycrase-(Y) in Air
Relative
Intensity
   0%   70% 100% 140% 210% 280% 350% 420% 490% 560% 630% 640%
R                        
 

Calculated Properties of Polycrase-(Y)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.47 gm/cc
note: Specific Gravity of Polycrase-(Y) =5.01 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEPolycrase-(Y) = 538.58 barns/electron
U=PEPolycrase-(Y) x relectron=2,405.33 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 603,860.75 (Gamma Ray American Petroleum Institute Units)
Concentration of Polycrase-(Y) per GRapi unit =1,656.01 (PPB)

Polycrase-(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) 50.37 ± 12.59 grams of pure Polycrase-(Y) .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 5037.0 ±1259.3 grams of pure Polycrase-(Y) .

Estimated Radioactivity from Polycrase-(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 / 7.25 cm 14,211,322 3.84E-04 603,860.75 198.53
100 gm / 3.37 cm 1,421,132 3.84E-05 60,386.07 19.85
10 gm / 1.56 cm 142,113 3.84E-06 6,038.61 1.99
1 gm / 7.25 mm 14,211 3.84E-07 603.86 0.20
0.1 gm / 3.37 mm 1,421 3.84E-08 60.39 0.02
0.01 gm / 1.56 mm 142 3.84E-09 6.04 0.00
0.001 gm / 0.73 mm 14 3.84E-10 0.60 0.00

Weight of pure Polycrase-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.01 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
 

Polycrase-(Y) Classification

Help on  Dana Class: Dana Class: 08.03.08.01 (08)Multiple Oxides with Nb, Ta, and Ti
  (08.03)where A (B2O6)
  (08.03.08)Polycrase Group
 
08.03.08.01 Polycrase-(Y) (Y,Ca,Ce,U,Th)(Ti,Nb,Ta)2O6 Pcan 2/m 2/m 2/m
 
08.03.08.02 Euxenite-(Y) (Y,Ca,Ce)(Nb,Ta,Ti)2O6 Pcan 2/m 2/m 2/m
 
08.03.08.03 Tanteuxenite-(Y) (Y,Ce,Ca)(Ta,Nb,Ti)2(O,OH)6 Pcan 2/m 2/m 2/m
 
08.03.08.04 Yttrocrasite-(Y) (Y,Th,Ca,U)(Ti,Fe)2(O,OH)6 Unk Ortho
 
08.03.08.05 Uranopolycrase (U,Y)(Ti,Nb,Ta)2O6 P bcn 2/m 2/m 2/m
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 Polycrase-(Y) 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 Polycrase-(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
13 - Uranium Minerals

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

Polycrase-(Y)

(Y,Ca,Ce,U,Th)(Ti,Nb,Ta)2O6
Dana No: 08.03.08.01 Strunz No: 04.DG.05
Locality:

 

Notes:

 

 
   
 


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