Cappelenite-(Y) Mineral Data

Cappelenite-(Y) Mineral Data
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General Cappelenite-(Y) Information

Help on Chemical Formula: Chemical Formula: Ba(Y,Ce)6Si3B6O24F2
Help on Composition: Composition: Molecular Weight = 1,344.28 gm
   Barium    10.22 %  Ba   11.41 % BaO
   Cerium    20.85 %  Ce   24.42 % Ce2O3
   Yttrium   26.45 %  Y    33.60 % Y2O3
   Silicon    6.27 %  Si   13.41 % SiO2
   Boron      4.82 %  B    15.54 % B2O3
   Oxygen    28.56 %  O
   Fluorine   2.83 %  F     2.83 % F
               -   %   F    -1.19 % -O=F2    
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: BaY4Ce2Si3B6O24F2
Help on Environment: Environment: In small vein in nepheline synite pegmatite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1885
Help on Locality: Locality: Lille-Aro in the Langesundfiord, southern Norway. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For D. Cappelen of Holden, Norway, a collector who discovered the mineral, and its "yttrium" content.
 

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Cappelenite-(Y) Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:0.43861
Help on Cell Dimensions: Cell Dimensions: a = 10.67, c = 4.68, Z = 1; V = 461.43 Den(Calc)= 4.84
Help on Crystal System: Crystal System: Trigonal - PyramidalH-M Symbol (3) Space Group: P 3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.78(1), 1.94(0.5), 3.46(0.5),
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Shen J , Moore P B , American Mineralogist , 69 (1984) p.190-195, Crystal structure of cappelenite, Ba(Y,RE)6[Si3B6O24]F2: a silicoborate, sheet structure

 

Physical Properties of Cappelenite-(Y)

Help on Cleavage: Cleavage: None
Help on Color: Color: Greenish brown.
Help on Density: Density: 4.4
Help on Diaphaneity: Diaphaneity: Subtransparent to opaque
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luster: Luster: Vitreous (Glassy)
 

Optical Properties of Cappelenite-(Y)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.019 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.074 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.157,KPDmeas= 0.1727,KC= 0.1695
Ncalc = 1.75 - 1.82
Help on Optical Data: Optical Data: Uniaxial (?), b=1.76.
 

Calculated Properties of Cappelenite-(Y)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.99 gm/cc
note: Specific Gravity of Cappelenite-(Y) =4.40 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PECappelenite-(Y) = 185.69 barns/electron
U=PECappelenite-(Y) x relectron= 741.52 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 20,180.14 (Gamma Ray American Petroleum Institute Units)
Concentration of Cappelenite-(Y) per GRapi unit = 49.55 (PPM)

Cappelenite-(Y) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Radioactivity from Cappelenite-(Y) - weak
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 / 7.57 cm 466,953 1.26E-05 20,180.14 6.63
100 gm / 3.51 cm 46,695 1.26E-06 2,018.01 0.66
10 gm / 1.63 cm 4,670 1.26E-07 201.80 0.07
1 gm / 7.57 mm 467 1.26E-08 20.18 0.01
0.1 gm / 3.51 mm 47 1.26E-09 2.02 0.00
0.01 gm / 1.63 mm 5 1.26E-10 0.20 0.00
0.001 gm / 0.76 mm 0 1.26E-11 0.02 0.00

Weight of pure Cappelenite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.40 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 ( 1.04 % Th) From Sum REE Elements (20.85 % REE)
 

Cappelenite-(Y) Classification
Help on Dana Class: Dana Class: 54.02.03.01 (54)Nesosilicate Borosilicates and Some Beryllosilicates
  (54.02)with B in [4] coordination
  (54.02.03)Cappellanite - Stillwellite group
 
54.02.03.01 Cappelenite-(Y) Ba(Y,Ce)6Si3B6O24F2 P 3 3
 
54.02.03.02 Stillwellite-(Ce) (Ce,La,Ca)BSiO5 P 31 3
Help on Strunz Class: Strunz Class: 09.AJ.30 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AJ -Nesosilicates with BO3 triangles and/or B[4], Be[4] tetrahedra,
 
09.AJ.30 Cappelenite-(Y) Ba(Y,Ce)6Si3B6O24F2 P 3 3
 

Other Cappelenite-(Y) Information
Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Cappelenite-(Y) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (UofA)
7 - MinDAT
8 - MinMax(Deutsch)
9 - MinMax(English)
10 - Mineralienatlas (Deutsch)
11 - QUT Mineral Atlas
12 - Ruff.Info
13 - WWW-MINCRYST

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Cappelenite-(Y)

Ba(Y,Ce)6Si3B6O24F2
Dana No: 54.02.03.01 Strunz No: 09.AJ.30
Locality:

 

Notes: