Retzian-(Nd) Mineral Data

General Retzian-(Nd) Information

Chemical Formula:

Mn2(Nd,Ce,La)(AsO4)(OH)4

Composition:

Molecular Weight = 459.29 gm

Lanthanum 3.02 % La 3.55 % La₂O₃

Cerium 9.15 % Ce 10.72 % Ce₂O₃

Manganese 23.92 % Mn 30.89 % MnO

Arsenic 16.31 % As 25.02 % As₂O₅

Hydrogen 0.88 % H 7.84 % H₂O

Neodymium 18.84 % Nd 21.98 % Nd₂O₃

Oxygen 27.87 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺₂Nd_0.6Ce_0.3La_0.1(AsO₄)(OH)₄

Environment:

With willemite, calcite, and franklinite

IMA Status:

Approved IMA 1982

Locality:

Sterling Hill mine, Ogdensburg, Sussex Co., NJ, USA. Link to MinDat.org Location Data.

Name Origin:

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

Name Pronunciation:

Retzian-(Nd)

Synonym:

Retzian-(Y)

Retzian-(Nd) Image

Images:

Retzian-(Nd)

Comments: Small crystal fragment of brown-orange retzian-(Nd), mounted on paper.
Location: Sterling Mine, Sterling Hill, Ogdensburg, Sussex County, New Jersey, USA. Scale: Not Given.
© Jeff Weissman / Photographic Guide to Mineral Species

Retzian-(Nd) Crystallography

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

By Intensity(I/I_o): 2.726(1), 3.534(0.6), 4.89(0.3),

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

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Physical Properties of Retzian-(Nd)

Color:

Pink brown, Reddish brown.

Optical Properties of Retzian-(Nd)

Gladstone-Dale:

CI meas= 0.014 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.025 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1744,KPDmeas= 0.1763,KC= 0.1789
Ncalc = 1.8

Calculated Properties of Retzian-(Nd)

Electron Density:

Bulk Density (Electron Density)=4.07 gm/cc
note: Specific Gravity of Retzian-(Nd) =4.45 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_Retzian-(Nd)= 186.37 barns/electron
U=PE_Retzian-(Nd) x r_electron= 758.74 barns/cc.

Radioactivity:

GRapi = 30,270.82 (Gamma Ray American Petroleum Institute Units)
Concentration of Retzian-(Nd) per GRapi unit = 33.04 (PPM)

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

**Estimated Radioactivity from Retzian-(Nd)** - weak
Specimen Size Weight/Volume (Sphere) *	Calculated Activity Becquerels (Bq)	Calculated Activity Curies (Ci)	Estimated Activity GR(api)	Estimated Exposure (mRem**)/hr If Held in Hand For One Hour
1000 gm / 7.54 cm	694,829	1.88E-05	30,270.82	9.95
100 gm / 3.50 cm	69,483	1.88E-06	3,027.08	1.00
10 gm / 1.63 cm	6,948	1.88E-07	302.71	0.10
1 gm / 7.54 mm	695	1.88E-08	30.27	0.01
0.1 gm / 3.50 mm	69	1.88E-09	3.03	0.00
0.01 gm / 1.63 mm	7	1.88E-10	0.30	0.00
0.001 gm / 0.75 mm	1	1.88E-11	0.03	0.00

Weight of pure Retzian-(Nd) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.45 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 ( 1.55 % Th) From Sum REE Elements (31.02 % REE)

Retzian-(Nd) Classification

Dana Class:

41.03.04.02 (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-(Nd) Information

See Also:

Links to other databases for Retzian-(Nd) :
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-(Nd) Specimen Label here :

Retzian-(Nd)

Mn2(Nd,Ce,La)(AsO4)(OH)4
Dana No: 41.03.04.02 Strunz No: 08.BM.05
Locality:

Notes: