Monazite-(Sm) Mineral Data (original) (raw)

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),

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| | 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

SpecimenSizeWeight/Volume(Sphere) * CalculatedActivityBecquerels(Bq) CalculatedActivityCuries (Ci) EstimatedActivityGR(api) EstimatedExposure(mRem**)/hrIf Held in HandFor 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

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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: