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Retzian-(Ce) Mineral Data

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General Retzian-(Ce) Information

Help on Chemical  Formula: Chemical Formula: Mn2Ce(AsO4)(OH)4
Help on Composition: Composition: Molecular Weight = 456.94 gm
   Cerium     30.66 %  Ce   35.92 % Ce2O3
   Manganese  24.05 %  Mn   31.05 % MnO
   Arsenic    16.40 %  As   25.15 % As2O5
   Hydrogen    0.88 %  H     7.89 % H2O
   Oxygen     28.01 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+2Ce(AsO4)(OH)4
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1894, Redifined 1982 to include Ce
Help on Locality: Locality: Moss Mine, Nordmark, Varmland, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Anders Jahan Retzius (1742-1821), Swedish naturalist.
Help on Name Pronunciation: Name Pronunciation: Retzian-(Ce) Say RETZIAN-(CE)
Help on Synonym: Synonym: ICSD 16903
  PDF 20-731
 

Retzian-(Ce) Crystallography

Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.717(1), 3.553(0.8), 1.848(0.5),
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Forms: ( 0 1 0) ( 1 0 1) ( 1 1 0) ( 0 0 1)

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Physical Properties of Retzian-(Ce)

Help on Color: Color: Dark brown, Chestnut brown.
 

Optical Properties of Retzian-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.053 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.044 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1725,KPDmeas= 0.19,KC= 0.1804
Ncalc = 1.75 - 1.82
 

Calculated Properties of Retzian-(Ce)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.18 gm/cc
note: Specific Gravity of Retzian-(Ce) =4.57 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0001357782
Boson Index = 0.9998642218
Help on Photoelectric: Photoelectric: PERetzian-(Ce) = 172.87 barns/electron
U=PERetzian-(Ce) x relectron= 722.69 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 29,920.72 (Gamma Ray American Petroleum Institute Units)
Concentration of Retzian-(Ce) per GRapi unit = 33.42 (PPM)

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

Estimated Radioactivity from Retzian-(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 / 7.48 cm 686,869 1.86E-05 29,920.72 9.84
100 gm / 3.47 cm 68,687 1.86E-06 2,992.07 0.98
10 gm / 1.61 cm 6,869 1.86E-07 299.21 0.10
1 gm / 7.48 mm 687 1.86E-08 29.92 0.01
0.1 gm / 3.47 mm 69 1.86E-09 2.99 0.00
0.01 gm / 1.61 mm 7 1.86E-10 0.30 0.00
0.001 gm / 0.75 mm 1 1.86E-11 0.03 0.00

Weight of pure Retzian-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.57 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 ( 1.53 % Th) From Sum REE Elements (30.66 % REE)
 

Retzian-(Ce) Classification

Help on  Dana Class: Dana Class: 41.03.04.01 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.03)where (A B)3 (XO4) Zq
  (41.03.04)Retzian Series
 
41.03.04.01 Retzian-(Ce) Mn2Ce(AsO4)(OH)4 Pban 2/m 2/m 2/m
 
41.03.04.02 Retzian-(Nd) Mn2(Nd,Ce,La)(AsO4)(OH)4 Pban 2/m 2/m 2/m
 
41.03.04.03 Retzian-(La) (Mn,Mg)2(La,Ce,Nd)(AsO4)(OH)4 Pban 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 08.BM.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BM -With medium-sized and large cations, (OH, etc.):RO4 = 4:1
 
08.BM.05 Retzian-(Ce) Mn2Ce(AsO4)(OH)4 Pban 2/m 2/m 2/m
 
08.BM.05 Retzian-(La) (Mn,Mg)2(La,Ce,Nd)(AsO4)(OH)4 Pban 2/m 2/m 2/m
 
08.BM.05 Retzian-(Nd) Mn2(Nd,Ce,La)(AsO4)(OH)4 Pban 2/m 2/m 2/m
 

Other Retzian-(Ce) Information

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

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Print or Cut-and-Paste your Retzian-(Ce) Specimen Label here :

Retzian-(Ce)

Mn2Ce(AsO4)(OH)4
Dana No: 41.03.04.01 Strunz No: 08.BM.05
Locality:

 

Notes:

 

 


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