Cheralite-(Ce) Mineral Data


[Newest Minerals] [Minerals for Sale] [Educational Articles] [About Us] [Image Gallery]
John Betts - Fine Minerals
Classic minerals, out-of-print books & magazines, plus informative articles for collectors

General Cheralite-(Ce) Information
Help on Chemical Formula: Chemical Formula: (Ce,Ca,Th)(P,Si)O4
Help on Composition: Composition: Molecular Weight = 239.85 gm
   Calcium           5.01 %  Ca    7.01 % CaO
   Lanthanum         5.79 %  La    6.79 % La2O3
   Cerium           11.68 %  Ce   13.68 % Ce2O3
   La,Ce,Pr,Nd,Sm,   3.00 %  RE    3.50 % REE2O3
   Thorium          29.02 %  Th   33.02 % ThO2
   Silicon           1.17 %  Si    2.51 % SiO2
   Phosphorus       11.62 %  P    26.63 % P2O5
   Neodymium         6.01 %  Nd    7.01 % Nd2O3
   Oxygen           26.68 %  O
                   ______        ______ 
                   100.00 %      100.17 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Th0.3Ca0.3Ce0.2Nd0.1La0.1REE0.05(PO4)0.9(SiO4)0.1
Help on Environment: Environment: Disseminated in a kaolinitized pegmatite dike.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1953
Help on Locality: Locality: From Kuttankuli (Kuttakuzhi), about 42 km east-southeast of Trivandrum, Kerala State, India. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For Chera (Kerala), an ancient Dravidian kingdom predating Travancor (now Kerala State), India.
Help on Synonym: Synonym: ICSD 81115
  PDF 33-1095
 

Cheralite-(Ce) Image

Click Here for Larger Cheralite-(Ce) Image in a New Browser Window Images:
Click Here for Larger Cheralite-(Ce) Image

Cheralite-(Ce)

Comments: Brown to tan, massive cheralite-(Ce) showing cleavage traces.
Location: Uranium King Mine, Trent Creek, Encampment Copper District, Sierra Madre Mts., Carbon Co., Wyoming, USA. Scale: Picture size 1.4 cm.
© Paul M. Schumacher

Cheralite-(Ce) Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.9706:1:0.9297
Help on Cell Dimensions: Cell Dimensions: a = 6.717, b = 6.92, c = 6.434, Z = 4; beta = 103.833° V = 290.39 Den(Calc)= 5.49
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): 3.07(1), 2.86(0.9), 3.26(0.9),
 

Physical Properties of Cheralite-(Ce)

Help on Cleavage: Cleavage: [010] Distinct, [100] Poor, [001] Parting
Help on Color: Color: Brown, Light green, Dark green.
Help on Density: Density: 5.3
Help on Diaphaniety: Diaphaniety: Transparent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Anhedral Grains - Granular minerals without the expression of crystal shapes
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous - Resinous
Help on Streak: Streak: white
 

Optical Properties of Cheralite-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.109 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.14 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1443,KPDmeas= 0.1494,KC= 0.1678
Help on Optical Data: Optical Data: Biaxial (+), a=1.779, b=1.78, g=1.817, bire=0.0380, 2V(Calc)=20, 2V(Meas)=17-20.
Help on Pleochroism (x): Pleochroism (x): green.
Help on Pleochroism (y): Pleochroism (y): green.
Help on Pleochroism (z): Pleochroism (z): yellowish green.
 

Calculated Properties of Cheralite-(Ce)

Help on Electron Density: Electron Density:

relectron=4.70 gm/cc
note: rCheralite-(Ce) =5.30 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.01869
Boson Index = 0.98131
Help on Photoelectric: Photoelectric:

PECheralite-(Ce) = 834.18 barns/electron
U=PECheralite-(Ce) x relectron=3,916.92 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 548,540.57 (Gamma Ray American Petroleum Institute Units)

Cheralite-(Ce) 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) 55.45 ± 13.86 grams of pure Cheralite-(Ce) .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 5545.0 ±1386.3 grams of pure Cheralite-(Ce) .

Estimated Radioactivity from Cheralite-(Ce) - 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 / 7.12 cm 13,002,232 3.51E-04 548,540.57 180.34
100 gm / 3.30 cm 1,300,223 3.51E-05 54,854.06 18.03
10 gm / 1.53 cm 130,022 3.51E-06 5,485.41 1.80
1 gm / 7.12 mm 13,002 3.51E-07 548.54 0.18
0.1 gm / 3.30 mm 1,300 3.51E-08 54.85 0.02
0.01 gm / 1.53 mm 130 3.51E-09 5.49 0.00
0.001 gm / 0.71 mm 13 3.51E-10 0.55 0.00

Weight of pure Cheralite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.30 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
 

Cheralite-(Ce) Classification
Help on Dana Class: Dana Class: 38.4.3.3 (38)Anhydrous Phosphates, etc
  (38.4)A+ XO4
  (38.4.3)Monazite Group (Monoclinic: P21/n)
 
38.4.3.1 Monazite-(Ce) (Ce,La,Nd,Th)PO4 P 21/n 2/m
 
38.4.3.2 Monazite-(La) (La,Ce,Nd)PO4 P 21/n 2/m
 
38.4.3.3 Cheralite-(Ce) (Ce,Ca,Th)(P,Si)O4 P 21/n 2/m
 
38.4.3.4 Brabantite CaTh(PO4)2 P 21 2
 
38.4.3.5 Monazite-(Nd) (Nd,Ce,La)(P,Si)O4 P 21/n 2/m
 
38.4.3.6 Gasparite-(Ce) CeAsO4 P 21/n 2/m
 
38.4.3.7 Monazite-(Sm)! SmPO4 P 21/n 2/m
Help on Strunz Class: Strunz Class: VII/A.15-40 VII - Phosphates, Arsenates and Vanadates
  VII/A - Waterfree phosphates [PO4]3- without unfamiliar anions, cations of very big size: Ca, Na and andre
  VII/A.15 - Monazite group
 
VII/A.15-10 Monazite-(La) (La,Ce,Nd)PO4 P 21/n 2/m
 
VII/A.15-20 Monazite-(Ce) (Ce,La,Nd,Th)PO4 P 21/n 2/m
 
VII/A.15-30 Monazite-(Nd) (Nd,Ce,La)(P,Si)O4 P 21/n 2/m
 
VII/A.15-35 Monazite-(Sm)! SmPO4 P 21/n 2/m
 
VII/A.15-40 Cheralite-(Ce) (Ce,Ca,Th)(P,Si)O4 P 21/n 2/m
 
VII/A.15-50 Brabantite CaTh(PO4)2 P 21 2
 

Other Cheralite-(Ce) Information
Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic4)
Help on See Also: See Also: Links to other databases for Cheralite-(Ce) :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 - Scandinavian mineral gallery

Search for Cheralite-(Ce) 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 Cheralite-(Ce) :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Cheralite-(Ce) Mineral Data :

Ask about Cheralite-(Ce) 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 Cheralite-(Ce) Specimen Label here :

Cheralite-(Ce)

(Ce,Ca,Th)(P,Si)O4
Dana No: 38.4.3.3 Strunz No: VII/A.15-40
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