Mineralogy Database

Aluminocerite-(Ce) Mineral Data

Search Webmineral :
  
Advertisment

General Aluminocerite-(Ce) Information

Help on Chemical  Formula: Chemical Formula: (Ce,REE,Ca)9(Al,Fe+++)(SiO4)3[SiO3(OH)]4(OH)3
Help on Composition: Composition: Molecular Weight = 1,725.28 gm
   Calcium         6.04 %  Ca    8.45 % CaO
   Lanthanum       6.44 %  La    7.55 % La2O3
   Cerium         20.22 %  Ce   23.69 % Ce2O3
   Praeseodymium   3.10 %  Pr    3.63 % Pr2O3
   Samarium        3.83 %  Sm    4.45 % Sm2O3
   Gadolinium      2.73 %  Gd    3.15 % Gd2O3
   Dysprosium      0.38 %  Dy    0.43 % Dy2O3
   Yttrium         1.34 %  Y     1.70 % Y2O3
   Ytterbium       0.10 %  Yb    0.11 % Yb2O3
   Aluminum        1.33 %  Al    2.51 % Al2O3
   Iron            0.32 %  Fe    0.46 % Fe2O3
   Silicon        11.40 %  Si   24.38 % SiO2
   Hydrogen        0.41 %  H     3.69 % H2O
   Neodymium      13.54 %  Nd   15.80 % Nd2O3
   Oxygen         28.80 %  O
                 ______        ______ 
                 100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2.6Ce2.49Nd1.62La0.8Sm0.44Pr0.38Gd0.3Y0.26Dy0.04Yb0.01Al0.85Fe3+0.1(SiO4)3 (SiO3)4(OH)4(OH)3.06
Help on Environment: Environment: Found in millimeter-sized secondary cavities hosted in aplite-pegmatite veins and pods within pink granite. Cerite group.
Help on IMA Status: IMA Status: Approved IMA 2007 (Dana # Added)
Help on Locality: Locality: Ratti quarry, Baveno, Verbania, Piemonte region, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the Al-dominant analog of cerite-(Ce).
Help on Synonym: Synonym: IMA2007-060
 

Aluminocerite-(Ce) Image

Click Here for Larger   Image in a New Browser Window Images:
Click Here for Larger   Image

  Aluminocerite-(Ce)

Comments: BSE image of the holotype of aluminocerite-(Ce) showing pseudo-octahedral to rombohedral crystals flattened on the c axis. (AmMin v94:488).
Location: Ratti quarry near Baveno, Italy.. Scale: See Image.
© American Mineralogist

Aluminocerite-(Ce) Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:3.58491
Help on Cell Dimensions: Cell Dimensions: a = 10.581, c = 37.932, Z = 6; V = 3,677.82 Den(Calc)= 4.67
Help on Crystal System: Crystal System: Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.914(1), 2.647(0.58), 1.732(0.46),2.198(0.4), 1.923(0.34), 3.405(0.27), 3.25(0.26), 1.826(0.24),
 

Physical Properties of Aluminocerite-(Ce)

Help on Cleavage: Cleavage: None
Help on Color: Color: Pale pink, Reddish pink.
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Pseudo Octohedral - Crystals show an octohedral outline.
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Aluminocerite-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI calc= -0.01 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1745,KC= 0.1729
Ncalc = 1.81
Help on Optical Data: Optical Data: Uniaxial (+), w=1.81-1.816, e=1.812-1.822, bire=0.0020-0.0060.
 

Calculated Properties of Aluminocerite-(Ce)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.27 gm/cc
note: Specific Gravity of Aluminocerite-(Ce) =4.67 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.06
Boson Index = 0.94
Help on Photoelectric: Photoelectric: PEAluminocerite-(Ce) = 277.84 barns/electron
U=PEAluminocerite-(Ce) x relectron=1,186.44 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 49,327.07 (Gamma Ray American Petroleum Institute Units)
Concentration of Aluminocerite-(Ce) per GRapi unit = 20.27 (PPM)

Aluminocerite-(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) 616.63 ±154.16 grams of pure Aluminocerite-(Ce) .

Estimated Radioactivity from Aluminocerite-(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 / 7.42 cm 1,132,852 3.06E-05 49,327.07 16.22
100 gm / 3.45 cm 113,285 3.06E-06 4,932.71 1.62
10 gm / 1.60 cm 11,329 3.06E-07 493.27 0.16
1 gm / 7.42 mm 1,133 3.06E-08 49.33 0.02
0.1 gm / 3.45 mm 113 3.06E-09 4.93 0.00
0.01 gm / 1.60 mm 11 3.06E-10 0.49 0.00
0.001 gm / 0.74 mm 1 3.06E-11 0.05 0.00

Weight of pure Aluminocerite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.67 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
Estimated Thorium Activity ( 2.52 % Th) From Sum REE Elements (50.36 % REE)
 

Aluminocerite-(Ce) Classification

Help on  Dana Class: Dana Class: 52.04.06.03 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
  (52.04)with cations in [6] and/or > [6] coordination
  (52.04.06)Cerite Group
 
52.04.06.01 Cerite-(Ce) Ce9Fe(SiO4)6[(SiO3)(OH)](OH)3 R 3c 3m
 
52.04.06.02 Cerite-(La)! (La,Ce,Ca)9(Mg,Fe)(SiO4)6[SiO3(OH)](OH)3 R 3c 3m
 
52.04.06.03 Aluminocerite-(Ce)! (Ce,REE,Ca)9(Al,Fe)(SiO4)3[SiO3(OH)]4(OH)3 R 3c 3m
Help on  Strunz Class: Strunz Class: 09.AG.20 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AG -Nesosilicates with additional anions; cations in > [6] � [6] coordination
 
09.AG.20 Cerite-(Ce) Ce9Fe(SiO4)6[(SiO3)(OH)](OH)3 R 3c 3m
 
09.AG.20 Cerite-(La)! (La,Ce,Ca)9(Mg,Fe)(SiO4)6[SiO3(OH)](OH)3 R 3c 3m
 
09.AG.20 Aluminocerite-(Ce)! (Ce,REE,Ca)9(Al,Fe)(SiO4)3[SiO3(OH)]4(OH)3 R 3c 3m
 

Other Aluminocerite-(Ce) Information

Help on References: References: NAME( AmMin, v94:487) PHYS. PROP.(AmMin, v94:487) OPTIC PROP.(AmMin, v94:487)
Help on See Also: See Also: Links to other databases for Aluminocerite-(Ce) :
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

Search for Aluminocerite-(Ce) using:

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

Visit our Advertisers for Aluminocerite-(Ce) :

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

Aluminocerite-(Ce)

(Ce,REE,Ca)9(Al,Fe+++)(SiO4)3[SiO3(OH)]4(OH)3
Dana No: 52.04.06.03 Strunz No: 09.AG.20
Locality:

 

Notes:

 

 
   
 


Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.