Mineralogy Database

Calciogadolinite Mineral Data

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General Calciogadolinite Information

Help on Chemical  Formula: Chemical Formula: CaREE(Fe+++)Be2Si2O10
Help on Composition: Composition: Molecular Weight = 474.11 gm
   Calcium           8.45 %  Ca   11.83 % CaO
   La,Ce,Pr,Nd,Sm,  30.37 %  RE   35.43 % REE2O3
   Beryllium         3.80 %  Be   10.55 % BeO
   Iron             11.78 %  Fe   16.84 % Fe2O3
   Silicon          11.85 %  Si   25.35 % SiO2
   Oxygen           33.75 %  O
                   ______        ______ 
                   100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaREEFe3+Be2Si2O10
Help on Environment: Environment: Calciogadolinte (1972) is generally regarded as Ca-bearing gadolinite-(Y).
Help on IMA Status: IMA Status: Discredited IMA 2006 - Approved IMA 1972
Help on Locality: Locality: Tadati (Tadachi) village, Nagano Prefecture, Japan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after it's composition and relationship to gadolinite.
 

Calciogadolinite Image

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  Gadolinite-(Y)   Calciogadolinite

Comments: Black vitreous, metamict massive gadolinite-(Y) also known as calcian gadolinite.
Location: Ytterøya Mine, Røvika, Ytterøya (island), Levanger, Nord-Trondelag, Norway. Scale: See Image.
© Rruff Database

Calciogadolinite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.3201:1:0.6206
Help on Cell Dimensions: Cell Dimensions: a = 9.988, b = 7.566, c = 4.696, Z = 2; beta = 90° V = 354.87 Den(Calc)= 4.44
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/a
 

Optical Properties of Calciogadolinite

Help on Optical Data: Optical Data: NCalc= 1.9 - from Gladstone-Dale relationship (KC = 0.2021) where Ncalc=Dcalc*KC+1
 

Calculated Properties of Calciogadolinite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.18 gm/cc
note: Specific Gravity of Calciogadolinite =4.44 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.1
Boson Index = 0.9
Help on Photoelectric: Photoelectric: PECalciogadolinite = 188.16 barns/electron
U=PECalciogadolinite x relectron= 785.87 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 30,585.51 (Gamma Ray American Petroleum Institute Units)
Concentration of Calciogadolinite per GRapi unit = 32.70 (PPM)

Calciogadolinite 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) 994.48 ±248.62 grams of pure Calciogadolinite .

Estimated Radioactivity from Calciogadolinite - 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 / 7.55 cm 682,784 1.85E-05 30,585.51 10.06
100 gm / 3.50 cm 68,278 1.85E-06 3,058.55 1.01
10 gm / 1.63 cm 6,828 1.85E-07 305.86 0.10
1 gm / 7.55 mm 683 1.85E-08 30.59 0.01
0.1 gm / 3.50 mm 68 1.85E-09 3.06 0.00
0.01 gm / 1.63 mm 7 1.85E-10 0.31 0.00
0.001 gm / 0.75 mm 1 1.85E-11 0.03 0.00

Weight of pure Calciogadolinite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.44 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 ( 1.52 % Th) From Sum REE Elements (30.37 % REE)
 

Calciogadolinite Classification

Help on  Dana Class: Dana Class: 54.02.01b.04 (54)Nesosilicate Borosilicates and Some Beryllosilicates
  (54.02)with B in [4] coordination
  (54.02.01b)Datolite group (Homilite series)
 
54.02.01b.01 Bakerite Ca4B4(BO4)(SiO4)3(OH)3•(H2O) P 21/c 2/m
 
54.02.01b.02 Gadolinite-(Ce) (Ce,La,Nd,Y)2FeBe2Si2O10 P 21/c 2/m
 
54.02.01b.03 Gadolinite-(Y) Y2FeBe2Si2O10 P 21/a 2/m
 
54.02.01b.04 Calciogadolinite? CaREE(Fe)Be2Si2O10 P 21/a 2/m
 
54.02.01b.05 Homilite Ca2(Fe,Mg)B2Si2O10 P 21/a 2/m
 
54.02.01b.06 Minasgeraisite-(Y) CaY2Be2Si2O10 P 21/a 2/m
Help on  Strunz Class: Strunz Class: 09.AJ.20 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AJ -Nesosilicates with BO3 triangles and/or B[4], Be[4] tetrahedra,
 
09.AJ.20 Bakerite Ca4B4(BO4)(SiO4)3(OH)3•(H2O) P 21/c 2/m
 
09.AJ.20 Calcybeborosilite-(Y)! (REE,Ca)2[](B,Be)2(SiO4)2(OH,O)2 P 21/a 2/m
 
09.AJ.20 Calciogadolinite? CaREE(Fe)Be2Si2O10 P 21/a 2/m
 
09.AJ.20 Datolite CaBSiO4(OH) P 21/c 2/m
 
09.AJ.20 Hingganite-(Yb) (Yb,Y)2([])Be2Si2O8(OH)2 P 21/a 2/m
 
09.AJ.20 Homilite Ca2(Fe,Mg)B2Si2O10 P 21/a 2/m
 
09.AJ.20 Gadolinite-(Ce) (Ce,La,Nd,Y)2FeBe2Si2O10 P 21/c 2/m
 
09.AJ.20 Gadolinite-(Y) Y2FeBe2Si2O10 P 21/a 2/m
 
09.AJ.20 Hingganite-(Ce) (Ce,Ca)2([],Fe)Be2Si2O8[(OH),O]2 P 21/a 2/m
 
09.AJ.20 Hingganite-(Y) Y2([])Be2Si2O8(OH)2 P 21/a 2/m
 
09.AJ.20 Melanocerite-(Ce) (Ce,Th,Ca)5(Si,B)3O12(OH,F)•n(H2O)(?) Unk (HEX-R) Trig
 
09.AJ.20 Minasgeraisite-(Y) CaY2Be2Si2O10 P 21/a 2/m
 

Other Calciogadolinite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Calciogadolinite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your Calciogadolinite Specimen Label here :

Calciogadolinite

CaREE(Fe+++)Be2Si2O10
Dana No: 54.02.01b.04 Strunz No: 09.AJ.20
Locality:

 

Notes:

 

 
   
 


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