Retzian-(La) Mineral Data

[Current Minerals] [Order Status] [Policies] [e-Bay Items]
B & L Minerals, Fine Mineral specimens for sale for collectors of all levels

General Retzian-(La) Information

Chemical Formula:

(Mn,Mg)2(La,Ce,Nd)(AsO4)(OH)4

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

Empirical Formula:

Mn²⁺_1.5Mg_0.5La_0.6Ce_0.3Nd_0.1(AsO₄)(OH)₄

Environment:

Overgrowth crystals and embedded in light brown rhodochrosite in the willemite-franlinite ore.

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-(La)

Search for Retzian-(La) Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Retzian-(La) Crystallography

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

By Intensity(I/I_o): 2.715(1), 3.51(0.8), 1.84(0.5),

Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above

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

Warning: this large pop-up is very compute intensive and may not work well with some computers.

Physical Properties of Retzian-(La)

Color:

Reddish brown.

Optical Properties of Retzian-(La)

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)

Electron Density:

Bulk Density (Electron Density)=4.05 gm/cc
note: Specific Gravity of Retzian-(La) =4.42 gm/cc.

Fermion Index:

Fermion Index = 0.0097580777
Boson Index = 0.9902419223

Photoelectric:

PE_Retzian-(La)= 172.48 barns/electron
U=PE_Retzian-(La) x r_electron= 698.26 barns/cc.

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

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

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

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 - Google Images
6 - Google Scholar
7 - MinDAT
8 - MinMax(Deutsch)
9 - MinMax(English)
10 - Mineralienatlas (Deutsch)
11 - QUT Mineral Atlas
12 - Ruff.Info

Search for Retzian-(La) using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Retzian-(La) :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Retzian-(La) Mineral Data :

Ask about Retzian-(La) here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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: