Perrierite-(Ce) Mineral Data + Say PERRIERITE-(CE)

General Perrierite-(Ce) Information
Help on Chemical Formula: Chemical Formula: (Ce,La,Ca)4(Fe++,Mg)2(Ti,Fe+++)3Si4O22
Help on Composition: Composition: Molecular Weight = 1,201.74 gm
   Sodium            0.38 %  Na    0.52 % Na2O
   Strontium         0.73 %  Sr    0.86 % SrO
   Calcium           3.00 %  Ca    4.20 % CaO
   Lanthanum        17.34 %  La   20.33 % La2O3
   Cerium           15.16 %  Ce   17.75 % Ce2O3
   La,Ce,Pr,Nd,Sm,   4.79 %  RE    5.59 % REE2O3
   Thorium           0.97 %  Th    1.10 % ThO2
   Magnesium         0.20 %  Mg    0.34 % MgO
   Titanium         11.16 %  Ti   18.61 % TiO2
   Manganese         1.37 %  Mn    1.77 % MnO
   Aluminum          0.22 %  Al    0.42 % Al2O3
   Iron              6.04 %  Fe    7.77 % FeO
   Silicon           9.35 %  Si   20.00 % SiO2
   Oxygen           29.29 %  O
                   ______        ______ 
                   100.00 %       99.27 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: La1.5Ce1.3Ca0.5REE0.4Na0.2Sr0.1Th0.05Ti2.8Fe2+1.3Ca0.4Mn2+0.3Mg0.1Al0.1Si4O22
Help on Environment: Environment: In sands derived from weathered tuffs and syenite pegmatites.
Help on IMA Status: IMA Status: Approved IMA 1987
Help on Locality: Locality: Nettuno, Lazio, and on Mt. Amiata, Tuscany, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Carlo Perier (1886-1948), Italian mineralogist.
Help on Synonym: Synonym: ICSD 33145
  PDF 19-302
 

Perrierite-(Ce) Image

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Perrierite-(Ce)   Pyrochlore   Zircon   Loparite-(Ce)

Comments: Reddish black perrierite crystal, with orange-brown pyrochlore crystal, yellow-brown zircon, and grayish-black loparite.
Location: Buer, Bjorkedalen, Langesundfjord, Telemark, Norway. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species
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Perrierite-(Ce)

Comments: Black, granular perrierite in white calcite.
Location: Buer, Bj?rkedalen, Porsgrunn, Telemark, Norway. Scale: Picture size 3 mm.
© Paul M. Schumacher

Perrierite-(Ce) Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =2.4217:1:2.0871
Help on Cell Dimensions: Cell Dimensions: a = 13.61, b = 5.62, c = 11.73, Z = 2; beta = 113.5° V = 822.79 Den(Calc)= 4.85
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 21/a
Click Here for Large Perrierite-(Ce) Structure Window Crystal Structure:

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Gottardi G , American Mineralogist , 45 (1960) p.1-14, The crystal structure of perrierite

 

Physical Properties of Perrierite-(Ce)

Help on Color: Color: Black, Brownish, Dark reddish brown.
Help on Density: Density: 4.29 - 4.45, Average = 4.37
Help on Diaphaniety: Diaphaniety: Opaque to translucent
Help on Fracture: Fracture: Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Habit: Habit: Metamict - Mineral originally crystalline, now amorphous due to radiation damage.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luster: Luster: Resinous
Help on Streak: Streak: brown
 

Optical Properties of Perrierite-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.079 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.027 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2045,KPDmeas= 0.2269,KC= 0.2102
Help on Optical Data: Optical Data: Biaxial (-), a=1.9-1.95, b=2.01, g=2.02-2.06, bire=0.1100-0.1200, 2V(Calc)=32-82, 2V(Meas)=60.
Help on Pleochroism (x): Pleochroism (x): yellow.
Help on Pleochroism (y): Pleochroism (y): opaque or dark red-violet.
Help on Pleochroism (z): Pleochroism (z): opaque or dark brown.
 

Calculated Properties of Perrierite-(Ce)

Help on Electron Density: Electron Density:

relectron=4.45 gm/cc
note: rPerrierite-(Ce) =4.85 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.03003
Boson Index = 0.96997
Help on Photoelectric: Photoelectric:

PEPerrierite-(Ce) = 215.14 barns/electron
U=PEPerrierite-(Ce) x relectron= 957.15 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 18,909.90 (Gamma Ray American Petroleum Institute Units)

Perrierite-(Ce) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Radioactivity from Perrierite-(Ce) - 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 / 7.33 cm 432,894 1.17E-05 18,909.90 6.22
100 gm / 3.40 cm 43,289 1.17E-06 1,890.99 0.62
10 gm / 1.58 cm 4,329 1.17E-07 189.10 0.06
1 gm / 7.33 mm 433 1.17E-08 18.91 0.01
0.1 gm / 3.40 mm 43 1.17E-09 1.89 0.00
0.01 gm / 1.58 mm 4 1.17E-10 0.19 0.00
0.001 gm / 0.73 mm 0 1.17E-11 0.02 0.00

Weight of pure Perrierite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.85 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
 

Perrierite-(Ce) Classification
Help on Dana Class: Dana Class: 56.2.8.3 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O
  (56.2)with cations in [4] and/or >[4] coordination
  (56.2.8)Perierite - Chevkinite group
 
56.2.8.1 Chevkinite-(Ce) (Ce,La,Ca,Th)4(Fe,Mg)2(Ti,Fe)3Si4O22 C 2/m 2/m
 
56.2.8.2 Strontiochevkinite (Sr,REE)4Fe(Ti,Zr)2Ti2Si4O22 C 2/a 2/m
 
56.2.8.3 Perrierite-(Ce) (Ce,La,Ca)4(Fe,Mg)2(Ti,Fe)3Si4O22 C 21/a 2/m
 
56.2.8.4 Orthochevkinite* (Ce,La,Ca,Na,Th)4(Fe,Mg)2(Ti,Fe)3Si4O22 Unk Ortho
 
56.2.8.5 Rengeite! Sr4ZrTi4Si4O22 P 21/a 2/m
 
56.2.8.6 Matsubaraite! Sr4TiTi4Si4O22 P 21/a 2/m
 
56.2.8.7 Polyakovite-(Ce)! (Ce,La,Nd,Pr,Ca)4(Mg,Fe)(Cr,Fe)2(Ti,Nb)2Si4O22 C 2/m 2/m
 
56.2.8.8 IMA2003-017! (REE,Ca)4(Fe,Ti,Fe,[])(Ti,Fe,Fe,Nb)4Si4O22 C 2/m 2/m
Help on Strunz Class: Strunz Class: VIII/C.17-30 VIII - Silicates
  VIII/C - Sorosilicates with [Si2O7]6-, with anions unfamiliar to tetraheders [O,OH,F]
  VIII/C.17 - Fresnoite - Belkovite series
 
VIII/C.17-05 Matsubaraite! Sr4TiTi4Si4O22 P 21/a 2/m
 
VIII/C.17-15 Rengeite! Sr4ZrTi4Si4O22 P 21/a 2/m
 
VIII/C.17-25 Polyakovite-(Ce)! (Ce,La,Nd,Pr,Ca)4(Mg,Fe)(Cr,Fe)2(Ti,Nb)2Si4O22 C 2/m 2/m
 
VIII/C.17-30 Perrierite-(Ce) (Ce,La,Ca)4(Fe,Mg)2(Ti,Fe)3Si4O22 C 21/a 2/m
 

Other Perrierite-(Ce) Information
Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(AntBidBlaNic2)
Help on See Also: See Also: Links to other databases for Perrierite-(Ce) :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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Perrierite-(Ce)

(Ce,La,Ca)4(Fe++,Mg)2(Ti,Fe+++)3Si4O22
Dana No: 56.2.8.3 Strunz No: VIII/C.17-30
Locality:

 

Notes:

 
 
   
 
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