Mineralogy Database

Retzian-(La) Mineral Data

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General Retzian-(La) Information

Help on Chemical  Formula: Chemical Formula: (Mn,Mg)2(La,Ce,Nd)(AsO4)(OH)4
Help on Composition: Composition: Molecular Weight = 441.31 gm
   Lanthanum  18.89 %  La   22.15 % La2O3
   Cerium      9.52 %  Ce   11.16 % Ce2O3
   Magnesium   2.75 %  Mg    4.57 % MgO
   Manganese  18.67 %  Mn   24.11 % MnO
   Arsenic    16.98 %  As   26.04 % As2O5
   Hydrogen    0.91 %  H     8.16 % H2O
   Neodymium   3.27 %  Nd    3.81 % Nd2O3
   Oxygen     29.00 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+1.5Mg0.5La0.6Ce0.3Nd0.1(AsO4)(OH)4
Help on Environment: Environment: Overgrowth crystals and embedded in light brown rhodochrosite in the willemite-franlinite ore.
Help on IMA Status: IMA Status: Approved IMA 1982
Help on Locality: Locality: Sterling Hill mine, Ogdensburg, Sussex Co., NJ, USA. 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-(La) Say RETZIAN-(LA)
 

Retzian-(La) Crystallography

Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.715(1), 3.51(0.8), 1.84(0.5),
Help on Forms: Forms:

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Forms: ( 0 1 0) ( 1 1 0) ( 1 0 1) ( 0 0 1)

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Physical Properties of Retzian-(La)

Help on Color: Color: Reddish brown.
 

Optical Properties of Retzian-(La)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.044 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.029 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1755,KPDmeas= 0.1728,KC= 0.1806
Ncalc = 1.8 - 1.81
 

Calculated Properties of Retzian-(La)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.05 gm/cc
note: Specific Gravity of Retzian-(La) =4.42 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0097580777
Boson Index = 0.9902419223
Help on Photoelectric: Photoelectric: PERetzian-(La) = 172.48 barns/electron
U=PERetzian-(La) x relectron= 698.26 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 30,949.28 (Gamma Ray American Petroleum Institute Units)
Concentration of Retzian-(La) per GRapi unit = 32.31 (PPM)

Retzian-(La) 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) 982.79 ±245.70 grams of pure Retzian-(La) .

Estimated Radioactivity from Retzian-(La) - 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 / 7.56 cm 709,606 1.92E-05 30,949.28 10.18
100 gm / 3.51 cm 70,961 1.92E-06 3,094.93 1.02
10 gm / 1.63 cm 7,096 1.92E-07 309.49 0.10
1 gm / 7.56 mm 710 1.92E-08 30.95 0.01
0.1 gm / 3.51 mm 71 1.92E-09 3.09 0.00
0.01 gm / 1.63 mm 7 1.92E-10 0.31 0.00
0.001 gm / 0.76 mm 1 1.92E-11 0.03 0.00

Weight of pure Retzian-(La) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.42 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 ( 1.58 % Th) From Sum REE Elements (31.68 % REE)
 

Retzian-(La) Classification

Help on  Dana Class: Dana Class: 41.03.04.03 (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-(La) Information

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

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

Retzian-(La)

(Mn,Mg)2(La,Ce,Nd)(AsO4)(OH)4
Dana No: 41.03.04.03 Strunz No: 08.BM.05
Locality:

 

Notes:

 

 


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