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Ashcroftine-(Ce) Mineral Data

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General Ashcroftine-(Ce) Information

Help on Chemical  Formula: Chemical Formula: K5Na5(Ce,Ca)12Si28O70(OH)2(CO3)8•8(H2O)
Help on Composition: Composition: Molecular Weight = 4,256.27 gm
   Potassium   4.59 %  K     5.53 % K2O
   Sodium      2.70 %  Na    3.64 % Na2O
   Calcium     2.82 %  Ca    3.95 % CaO
   Cerium     29.63 %  Ce   34.70 % Ce2O3
   Silicon    18.48 %  Si   39.53 % SiO2
   Hydrogen    0.43 %  H     3.81 % H2O
   Carbon      2.26 %  C     8.27 % CO2
   Oxygen     39.09 %  O
             ______        ______ 
             100.00 %       99.44 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K5Na5Ce9Ca3Si28O70(OH)2(CO3)8•8(H2O)
Help on IMA Status: IMA Status: Not Approved IMA
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Frederick Noel Ashcroft (1878-1949), benefactor to the British Museum (Natural History), London, England.
Help on Name Pronunciation: Name Pronunciation: Ashcroftine-(Ce) + Pronunciation Say ASHCROFTINE-(CE)
 

Ashcroftine-(Ce) Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.72984
Help on Cell Dimensions: Cell Dimensions: a = 23.994, c = 17.512, Z = 4; V = 10,081.87 Den(Calc)= 2.80
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: I 4/mmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 17.1(1), 12(0.8), 3.1(0.6),
 

Physical Properties of Ashcroftine-(Ce)

Help on Color: Color: Pink.
Help on Density: Density: 2.53 - 2.61, Average = 2.57
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Luster: Luster: Vitreous - Silky
 

Optical Properties of Ashcroftine-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.115 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.023 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.193,KPDmeas= 0.2103,KC= 0.1887
Ncalc = 1.48 - 1.53
Help on Optical Data: Optical Data: Uniaxial (+), w=1.536, e=1.545, bire=0.0090.
 

Calculated Properties of Ashcroftine-(Ce)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.66 gm/cc
note: Specific Gravity of Ashcroftine-(Ce) =2.80 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0091086179
Boson Index = 0.9908913821
Help on Photoelectric: Photoelectric: PEAshcroftine-(Ce) = 145.64 barns/electron
U=PEAshcroftine-(Ce) x relectron= 387.45 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 30,089.72 (Gamma Ray American Petroleum Institute Units)
Concentration of Ashcroftine-(Ce) per GRapi unit = 33.23 (PPM)

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

Estimated Radioactivity from Ashcroftine-(Ce) - 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 / 8.80 cm 665,052 1.80E-05 30,089.72 9.89
100 gm / 4.09 cm 66,505 1.80E-06 3,008.97 0.99
10 gm / 1.90 cm 6,651 1.80E-07 300.90 0.10
1 gm / 8.80 mm 665 1.80E-08 30.09 0.01
0.1 gm / 4.09 mm 67 1.80E-09 3.01 0.00
0.01 gm / 1.90 mm 7 1.80E-10 0.30 0.00
0.001 gm / 0.88 mm 1 1.80E-11 0.03 0.00

Weight of pure Ashcroftine-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.80 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 ( 1.48 % Th) From Sum REE Elements (29.63 % REE)
 

Ashcroftine-(Ce) Classification

Help on  Dana Class: Dana Class: 65.00.00.00 (65)Inosilicate Minerals
  (65.00)Without Dana Classification Numbers
  (65.00.00)Inosilicate
 
65.00.00.00 Ashcroftine-(Ce)* K5Na5(Ce,Ca)12Si28O70(OH)2(CO3)8•8(H2O) I 4/mmm 4/m 2/m 2/m
 
65.00.00.00 Brokenhillite* (Mn,Fe)32[Si24O60]OH29Cl11 P 63mc 6mm
 
65.00.00.00 Grossmanite CaTiAlSiO6 C 2/m 2/m
 
65.00.00.00 Hypersthene? (Mg,Fe)2Si2O6 2/m 2/m 2/m
 
65.00.00.00 IMA2007-015 K(CaNa)(Fe3Al2)(Si6Al2)O22(OH)2 C 2/m 2/m
 
65.00.00.00 IMA2008-070 NaLi2(Fe2Al2Li)(Si6Al2)O22F2 C 2/m 2/m
 
65.00.00.00 IMA2009-010 [Ba6(PO4)2(CO3)][Fe7(OH)4Fe2O2(SiO3)8] P1 1
 
65.00.00.00 IMA2009-012 NaNa2(Mg2Al2Li)Si8O22F2 C 2/m 2/m
 
65.00.00.00 Kushiroite CaAl2SiO6 C 2/c 2/m
 
65.00.00.00 Plumalsite* Pb4Al2(SiO3)7(?) Unk Ortho
Help on  Strunz Class: Strunz Class: 09.DN.15 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DN -Inosilicates with 6-periodic double chains
 
09.DN.15 Ashcroftine-(Ce)* K5Na5(Ce,Ca)12Si28O70(OH)2(CO3)8•8(H2O) I 4/mmm 4/m 2/m 2/m
 
09.DN.15 Ashcroftine-(Y) K5Na5(Y,Ca)12Si28O70(OH)2(CO3)8•8(H2O) I 4/mmm 4/m 2/m 2/m
 

Other Ashcroftine-(Ce) Information

Help on See Also: See Also: Links to other databases for Ashcroftine-(Ce) :
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 Ashcroftine-(Ce) Specimen Label here :

Ashcroftine-(Ce)

K5Na5(Ce,Ca)12Si28O70(OH)2(CO3)8•8(H2O)
Dana No: 65.00.00.00 Strunz No: 09.DN.15
Locality:

 

Notes:

 

 
   
 


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