Monazite-(Sm)  Mineral Data

Monazite-(Sm) Mineral Data

Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images Share
      News Help About

Advertisment
For more than thirty (30) years, Excalibur Mineral Corp. has been providing private collectors, researchers, major universities and museums throughout the world with reliably identified, rare and unusual mineral samples for science an
John Betts - Fine Minerals, New York. Dealers of Fine Minerals and Natural Crystal Clusters since 1989. We buy rock collections, we buy gem collections, we buy mineral collections.
Our Mission is Simple: RMS will be the go-to portal for all mineral, gem and rock shows in the USA
Exceptional Minerals features excellent, high quality mineral specimens for sale. We also have a weekly Best Offer Mineral Auction.

General Monazite-(Sm) Information

Help on Chemical  Formula: Chemical Formula: SmPO4
Help on Composition: Composition: Molecular Weight = 221.25 gm
   Calcium      1.81 %  Ca    2.53 % CaO
   Cerium       9.50 %  Ce   11.13 % Ce2O3
   Samarium    13.59 %  Sm   15.76 % Sm2O3
   Gadolinium  14.21 %  Gd   16.38 % Gd2O3
   Thorium     15.73 %  Th   17.90 % ThO2
   Phosphorus  12.60 %  P    28.87 % P2O5
   Neodymium    6.52 %  Nd    7.60 % Nd2O3
   Oxygen      26.03 %  O
              ______        ______ 
              100.00 %      100.18 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Sm0.2Gd0.2Th0.15Ce0.15Ca0.1Nd0.1(PO4)0.9
Help on Environment: Environment: Lepidolite-subtype granitic pegmatite within the Greer Lake intrusion of pegmatitic leucogranite. Monazite group, structure
Help on IMA Status: IMA Status: Approved IMA 2002 (Dana # Added)
Help on Locality: Locality: Anne Claim #3, 1.2 km northwest of Greer Lake, southeatern Mintoba, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the Sm-dominant member of the monazite series.
Help on Name Pronunciation: Name Pronunciation: Monazite-(Sm) Say MONAZITE-(SM)
Help on Synonym: Synonym: ICSD 79751
  IMA2001-001
  PDF 46-1329
 

Monazite-(Sm) Image

Click Here for Larger Monazite-(Sm) Image in a New Browser Window Images:
Click Here for Larger Monazite-(Sm) Image

Monazite-(Sm)

Comments: Back-scattered electron image of the main aggregate of monazite-(Sm) and manganocolumbite (C) embedded in quartz (black). Variations in brightness of the monazite-(Sm) are controlled by the Th content, whereas the ratio Nb/Ta affects manganotantalite.
Location: Annie Claim #3 pod, Greer Lake intrusion, Archean Bird River Subprovince of the Superior Province, Southeastern Manitoba, Canada. Scale: Grain size 0.8 mm.
© Canadian Mineralogist

Monazite-(Sm) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9695:1:0.9296
Help on Cell Dimensions: Cell Dimensions: a = 6.725, b = 6.936, c = 6.448, Z = 4; beta = 104.02° V = 291.80 Den(Calc)= 5.04
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.065(1)(120), 2.857(0.9)(112,012), 4.162(0.8)(111),3.264(0.7)(200), 4.647(0.5)(011), 3.492(0.4)(111,020), 5.19(0.4),
Click Here for Large Monazite-(Sm) Structure Window Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate

Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above


Ni Y , Hughes J M , Mariano A N , American Mineralogist , 80 (1995) p.21-26, Crystal chemistry of the monazite and xenotime structures, Sm(PO4)

 

Physical Properties of Monazite-(Sm)

Help on Cleavage: Cleavage: {???} Good
Help on Color: Color: Yellowish.
Help on Diaphaneity: Diaphaneity: Translucent to transparent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Subhedral Crystals - Occurs as crystals which tend to exhibit a recognizable crystal shape.
Help on Luster: Luster: Vitreous - Greasy
Help on Streak: Streak: white
 

Optical Properties of Monazite-(Sm)

Help on Gladstone-Dale: Gladstone-Dale: CI calc= -0.005 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1559,KC= 0.1551
Ncalc = 1.78
Help on Optical Data: Optical Data: Biaxial (+), a=1.768, b=1.771, g=1.818, bire=0.0500
 

Calculated Properties of Monazite-(Sm)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.45 gm/cc
note: Specific Gravity of Monazite-(Sm) =5.04 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.15
Boson Index = 0.85
Help on Photoelectric: Photoelectric: PEMonazite-(Sm) = 658.05 barns/electron
U=PEMonazite-(Sm) x relectron=2,929.09 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 297,115.85 (Gamma Ray American Petroleum Institute Units)
Concentration of Monazite-(Sm) per GRapi unit = 3.37 (PPM)

Monazite-(Sm) 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) 102.37 ± 25.59 grams of pure Monazite-(Sm) .

Estimated Radioactivity from Monazite-(Sm) - strong
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 / 7.24 cm 7,064,896 1.91E-04 297,115.85 97.68
100 gm / 3.36 cm 706,490 1.91E-05 29,711.58 9.77
10 gm / 1.56 cm 70,649 1.91E-06 2,971.16 0.98
1 gm / 7.24 mm 7,065 1.91E-07 297.12 0.10
0.1 gm / 3.36 mm 706 1.91E-08 29.71 0.01
0.01 gm / 1.56 mm 71 1.91E-09 2.97 0.00
0.001 gm / 0.72 mm 7 1.91E-10 0.30 0.00

Weight of pure Monazite-(Sm) in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.04 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
 

Monazite-(Sm) Classification

Help on  Dana Class: Dana Class: 38.04.03.07 (38)Anhydrous Phosphates, etc
  (38.04)A+ XO4
  (38.04.03)Monazite Group (Monoclinic: P21/n)
 
38.04.03.01 Monazite-(Ce) (Ce,La,Nd,Th)PO4 P 21/n 2/m
 
38.04.03.02 Monazite-(La) (La,Ce,Nd)PO4 P 21/n 2/m
 
38.04.03.03 Cheralite-(Ce)? (Ce,Ca,Th)(P,Si)O4 P 21/n 2/m
 
38.04.03.04 Brabantite? CaTh(PO4)2 P 21 2
 
38.04.03.05 Monazite-(Nd) (Nd,Ce,La)(P,Si)O4 P 21/n 2/m
 
38.04.03.06 Gasparite-(Ce) CeAsO4 P 21/n 2/m
 
38.04.03.07 Monazite-(Sm)! SmPO4 P 21/n 2/m
Help on  Strunz Class: Strunz Class: 08.AD.50 08 - PHOSPHATES, ARSENATES, VANADATES
  08.A - Phosphates, etc. without additional anions, without H2O
  08.AD -With only large cations
 
08.AD.50 Brabantite? CaTh(PO4)2 P 21 2
 
08.AD.50 Gasparite-(Ce) CeAsO4 P 21/n 2/m
 
08.AD.50 Monazite-(Ce) (Ce,La,Nd,Th)PO4 P 21/n 2/m
 
08.AD.50 Monazite-(La) (La,Ce,Nd)PO4 P 21/n 2/m
 
08.AD.50 Monazite-(Nd) (Nd,Ce,La)(P,Si)O4 P 21/n 2/m
 
08.AD.50 Rooseveltite BiAsO4 P 2/m 2/m
 
08.AD.50 Monazite-(Sm)! SmPO4 P 21/n 2/m
 

Other Monazite-(Sm) Information

Help on References: References: NAME( CanMin, v 41, p 820) PHYS. PROP.(CanMin, v 41, p 820) OPTIC PROP.(CanMin, v 41, p 820)
Help on See Also: See Also: Links to other databases for Monazite-(Sm) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
11 - Uranium Minerals

Search for Monazite-(Sm) using:

Google
 
Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Monazite-(Sm) :

A Bijoux Google Search for Monazite-(Sm)
Adam's Minerals Google Search for Monazite-(Sm)
Cape Minerals Google Search for Monazite-(Sm)
Dakota Matrix Minerals Google Search for Monazite-(Sm)
Excalibur Mineral Corp. Google Search for Monazite-(Sm)
Exceptional Minerals Google Search for Monazite-(Sm)
John Betts Fine Minerals Search for Monazite-(Sm)
McDougall Minerals Google Search for Monazite-(Sm)
Mineral News Website Link
Rock and Mineral Shows Google Search for Monazite-(Sm)
Weinrich Minerals, Inc. Google Search for Monazite-(Sm)

Ask about Monazite-(Sm) 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 Espaņol

Print or Cut-and-Paste your Monazite-(Sm) Specimen Label here :

Monazite-(Sm)

SmPO4
Dana No: 38.04.03.07 Strunz No: 08.AD.50
Locality:

 

Notes: