Aeschynite-(Nd) Mineral Data + Say AESCHYNITE-(ND)

General Aeschynite-(Nd) Information
Help on Chemical Formula: Chemical Formula: (Nd,Ce)(Ti,Nb)2(O,OH)6
Help on Composition: Composition: Molecular Weight = 346.61 gm
   Cerium     16.17 %  Ce   18.94 % Ce2O3
   Titanium   24.17 %  Ti   40.33 % TiO2
   Niobium     6.70 %  Nb    9.59 % Nb2O5
   Hydrogen    0.29 %  H     2.60 % H2O
   Neodymium  24.97 %  Nd   29.12 % Nd2O3
   Oxygen     27.70 %  O
             ______        ______ 
             100.00 %      100.58 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Nd0.6Ce0.4Ti1.75Nb0.25O5(OH)
Help on IMA Status: IMA Status: Approved IMA 1982
Help on Locality: Locality: China, Inner Mongolia, Bayan Obo Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its composition and from the Greek for "shame," in allusion to the inability of chemists, at the time of its discovery, to separate some of its constituents.
Help on Synonym: Synonym: Eschynite
  ICSD 23509 (La)
  PDF 38-480
 

Search for Aeschynite-(Nd) Images

Click Here To Search 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.
  

Aeschynite-(Nd) Crystallography
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pmnb ?
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.93(1), 3(0.9), 1.575(0.7),
 

Physical Properties of Aeschynite-(Nd)

Help on Cleavage: Cleavage: None
Help on Color: Color: Brown.
Help on Density: Density: 4.6 - 5.04, Average = 4.82
Help on Diaphaniety: Diaphaniety: Subtranslucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Metamict - Mineral originally crystalline, now amorphous due to radiation damage.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 5-6 - Between Apatite and Orthoclase
Help on Luster: Luster: Adamantine
Help on Streak: Streak: brown
 

Optical Properties of Aeschynite-(Nd)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.037 (Excellent) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.2697,KC= 0.2602
Help on Optical Data: Optical Data: Isotropic, n=2.2-2.4.
 

Calculated Properties of Aeschynite-(Nd)

Help on Electron Density: Electron Density:

relectron=4.37 gm/cc
note: rAeschynite-(Nd) =4.82 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.08252
Boson Index = 0.91748
Help on Photoelectric: Photoelectric:

PEAeschynite-(Nd) = 241.66 barns/electron
U=PEAeschynite-(Nd) x relectron=1,054.85 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 39,739.68 (Gamma Ray American Petroleum Institute Units)

Aeschynite-(Nd) 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) 765.40 ±191.35 grams of pure Aeschynite-(Nd) .

Estimated Radioactivity from Aeschynite-(Nd) - 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 / 7.34 cm 921,499 2.49E-05 39,739.68 13.07
100 gm / 3.41 cm 92,150 2.49E-06 3,973.97 1.31
10 gm / 1.58 cm 9,215 2.49E-07 397.40 0.13
1 gm / 7.34 mm 921 2.49E-08 39.74 0.01
0.1 gm / 3.41 mm 92 2.49E-09 3.97 0.00
0.01 gm / 1.58 mm 9 2.49E-10 0.40 0.00
0.001 gm / 0.73 mm 1 2.49E-11 0.04 0.00

Weight of pure Aeschynite-(Nd) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.82 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 ( 2.06 % Th) From Sum REE Elements (41.14 % REE)
 

Aeschynite-(Nd) Classification
Help on Dana Class: Dana Class: 8.3.6.5 (8)Multiple Oxides with Nb, Ta, and Ti
  (8.3)where A (B2O6)
  (8.3.6)Dana Group
 
8.3.6.1 Aeschynite-(Ce) (Ce,Ca,Fe)(Ti,Nb)2(O,OH)6 Pmnb 2/m 2/m 2/m
 
8.3.6.2 Niobo-aeschynite-(Ce) (Ce,Ca)(Nb,Ti)2(O,OH)6 Pbnm 2/m 2/m 2/m
 
8.3.6.3 Aeschynite-(Y) (Y,Ca,Fe)(Ti,Nb)2(O,OH)6 Pbnm 2/m 2/m 2/m
 
8.3.6.4 Tantalaeschynite-(Y) (Y,Ce,Ca)(Ta,Ti,Nb)2O6 Pbnm 2/m 2/m 2/m
 
8.3.6.5 Aeschynite-(Nd) (Nd,Ce)(Ti,Nb)2(O,OH)6 Pmnb ? 2/m 2/m 2/m
 
8.3.6.6 Niobo-aeschynite-(Nd)! (Nd,Ce)(Nb,Ti)2(O,OH)6 Pbnm 2/m 2/m 2/m
Help on Strunz Class: Strunz Class: IV/D.21-30 IV - Oxides
  IV/D - Oxides with metal : oxygen = 1:2 (MO2 and related compounds)
  IV/D.21 - Aeschynite series
 
IV/D.21-10 Aeschynite-(Y) (Y,Ca,Fe)(Ti,Nb)2(O,OH)6 Pbnm 2/m 2/m 2/m
 
IV/D.21-20 Aeschynite-(Ce) (Ce,Ca,Fe)(Ti,Nb)2(O,OH)6 Pmnb 2/m 2/m 2/m
 
IV/D.21-30 Aeschynite-(Nd) (Nd,Ce)(Ti,Nb)2(O,OH)6 Pmnb ? 2/m 2/m 2/m
 
IV/D.21-40 Vigezzite (Ca,Ce)(Nb,Ta,Ti)2O6 Pmnb 2/m 2/m 2/m
 
IV/D.21-50 Niobo-aeschynite-(Ce) (Ce,Ca)(Nb,Ti)2(O,OH)6 Pbnm 2/m 2/m 2/m
 
IV/D.21-60 Niobo-aeschynite-(Nd)! (Nd,Ce)(Nb,Ti)2(O,OH)6 Pbnm 2/m 2/m 2/m
 
IV/D.21-70 Rynersonite Ca(Ta,Nb)2O6 Pmnb 2/m 2/m 2/m
 
IV/D.21-80 Tantalaeschynite-(Y) (Y,Ce,Ca)(Ta,Ti,Nb)2O6 Pbnm 2/m 2/m 2/m
 

Other Aeschynite-(Nd) Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Dana) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Aeschynite-(Nd) :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - Uranium Minerals 13 -École des Mines de Paris

Search for Aeschynite-(Nd) using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Aeschynite-(Nd) :
AA Mineral Specimens
A-Rocks Auction
Adams Minerals
B and L Minerals
Dakota Matrix
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Minernet.it
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Aeschynite-(Nd) Mineral Data :

Ask about Aeschynite-(Nd) 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 Aeschynite-(Nd) Specimen Label here :

Aeschynite-(Nd)

(Nd,Ce)(Ti,Nb)2(O,OH)6
Dana No: 8.3.6.5 Strunz No: IV/D.21-30
Locality:

 

Notes:

 
 
   
 
Go To Webmineral Home Crystallography X-Ray D-Spacing Table Chemical Composition
Dana Classification Strunz Classification Table of Mineral Properties Alphabetical Listing of Minerals
Search Webmineral Photo Gallery of Mineral Images Help Files Links