Monazite-(Sm) Mineral Data

Monazite-(Sm) Mineral Data
Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images       News Help About


Dakota Matrix
[Newest Minerals] [Rare Minerals] [Cabinet Specimens] [About Us] [Image Gallery]
Dakota Matrix Minerals
Updated weekly, for the collector, educator, and researcher since 1996
Extensive Inventory of very Rare Minerals. Visa and Mastercard are Welcome


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
Bequerols
(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
[ALTAVISTA] [AOL] [bing] [GeoScienceWorld] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Monazite-(Sm) :

B & L Fine Minerals

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Excalibur Minerals

Exceptional Minerals

Fabre Minerals

John Betts Fine Minerals

Lapis Mineral Journal

Mineral News

UV Tools

Wrights Rock Shop

Translate Monazite-(Sm) Mineral Data :

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: