Polycrase-(Y) Mineral Data (original) (raw)

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

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

Click Here for Larger Polycrase-(Y) Image 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 - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pcan

Help on Forms: Forms:

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| | Forms:( 0 1 0) ( 2 0 1) ( 1 1 1) ( 1 1 0) ( 1 0 0) Warning: this large pop-up is very compute intensive and may not work well with some computers. | | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Click Here for Large Polycrase-(Y) Structure Window Crystal Structure:

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| | Johnsen O , Stahl K , Petersen O V , Micheelsen H I , Neues Jahrbuch fur Mineralogie, Monatshefte , 1999 (1999) p.1-10, Structure refinement of natural non-metamict polycrase-(Y) from Zomba-Malosa, complex, Malawi, Locality: Zomba-Malosa complex, Malawi | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

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

RelativeIntensity 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

SpecimenSizeWeight/Volume(Sphere) * CalculatedActivityBecquerels(Bq) CalculatedActivityCuries (Ci) EstimatedActivityGR(api) EstimatedExposure(mRem**)/hrIf Held in HandFor 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: