Retzian-(Ce) Mineral Data

General Retzian-(Ce) Information

Chemical Formula:

Mn2Ce(AsO4)(OH)4

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

Empirical Formula:

Mn²⁺₂Ce(AsO₄)(OH)₄

IMA Status:

Valid Species (Pre-IMA) 1894, Redifined 1982 to include Ce

Locality:

Moss Mine, Nordmark, Varmland, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named for Anders Jahan Retzius (1742-1821), Swedish naturalist.

Name Pronunciation:

Retzian-(Ce)

Synonym:

ICSD 16903

PDF 20-731

Retzian-(Ce) Crystallography

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.717(1), 3.553(0.8), 1.848(0.5),

Forms:

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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)

Color:

Dark brown, Chestnut brown.

Optical Properties of Retzian-(Ce)

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)

Electron Density:

Bulk Density (Electron Density)=4.18 gm/cc
note: Specific Gravity of Retzian-(Ce) =4.57 gm/cc.

Fermion Index:

Fermion Index = 0.0001357782
Boson Index = 0.9998642218

Photoelectric:

PE_Retzian-(Ce)= 172.87 barns/electron
U=PE_Retzian-(Ce) x r_electron= 722.69 barns/cc.

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

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

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

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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