Allanite-(Y)  Mineral Data

Allanite-(Y) Mineral Data

Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images Share
      News Help About

Advertisment
McDougall Minerals sells high-quality mineral specimens from all over the world to collectors of all levels, from beginners to connoisseurs
Exceptional Minerals features excellent, high quality mineral specimens for sale. We also have a weekly Best Offer Mineral Auction.
A Bijoux.com is an online store specialized in the sale on the internet of precious stones , gems , minerals and jewels for individuals and professionals
For more than thirty (30) years, Excalibur Mineral Corp. has been providing private collectors, researchers, major universities and museums throughout the world with reliably identified, rare and unusual mineral samples for science an

General Allanite-(Y) Information

Help on Chemical  Formula: Chemical Formula: (Y,Ce,Ca)2(Al,Fe+++)3(SiO4)3(OH)
Help on Composition: Composition: Molecular Weight = 598.63 gm
   Calcium    2.01 %  Ca    2.81 % CaO
   Cerium    14.04 %  Ce   16.45 % Ce2O3
   Yttrium   17.82 %  Y    22.63 % Y2O3
   Aluminum  10.14 %  Al   19.16 % Al2O3
   Iron       7.00 %  Fe   10.00 % Fe2O3
   Silicon   14.07 %  Si   30.11 % SiO2
   Hydrogen   0.17 %  H     1.50 % H2O
   Oxygen    34.74 %  O
            ______        ______ 
            100.00 %      102.67 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Y1.2Ce0.6Ca0.3Al2.25Fe3+0.75(SiO4)3(OH)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1949 - Dana Number Modified from 58.2.1a.3
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the Scottish mineralogist, T. Allan (1777-1833).
Help on Name Pronunciation: Name Pronunciation: Allanite-(Y) Say ALLANITE-(Y)
Help on Synonym: Synonym: Orthite
 

Allanite-(Y) Image

Click Here for Larger Allanite-(Y) Image in a New Browser Window Images:
Click Here for Larger Allanite-(Y) Image

Allanite-(Y)

Comments: Dark brown allanite-(Y) in matrix.
Location: Boden, Marienberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 10 mm.
© Thomas Witzke / Abraxas-Verlag

Allanite-(Y) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.5617:1:1.7791
Help on Cell Dimensions: Cell Dimensions: a = 8.98, b = 5.75, c = 10.23, Z = 2; beta = 115° V = 478.74 Den(Calc)= 4.15
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/m
 

Physical Properties of Allanite-(Y)

Help on Cleavage: Cleavage: {001} Imperfect, {100} Imperfect
Help on Color: Color: Brown, Black.
Help on Density: Density: 3.3 - 4.2, Average = 3.75
Help on Diaphaneity: Diaphaneity: Translucent to opaque
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Disseminated - Occurs in small, distinct particles dispersed in matrix.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Greasy
Help on Streak: Streak: grayish brown
 

Optical Properties of Allanite-(Y)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.014 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.109 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1845,KPDmeas= 0.2042,KC= 0.207
Ncalc = 1.68 - 1.87
Help on Optical Data: Optical Data: Biaxial (-), a=1.715-1.791, b=1.718-1.815, g=1.733-1.822, bire=0.0180-0.0310, 2V(Calc)=50-56, 2V(Meas)=40-80. Dispersion distinct to strong, r > v.
Help on Pleochroism (x): Pleochroism (x): colorless, pale yellow, yellowish brown, pink, or greenish yellow.
Help on Pleochroism (y): Pleochroism (y): yellowish brown, reddish brown, brownish green, dark reddish brown, or greenish brown.
Help on Pleochroism (z): Pleochroism (z): pale yellow, brownish yellow, brownish green, green, or brown.
 

Calculated Properties of Allanite-(Y)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.55 gm/cc
note: Specific Gravity of Allanite-(Y) =3.75 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0082504498
Boson Index = 0.9917495502
Help on Photoelectric: Photoelectric: PEAllanite-(Y) = 93.85 barns/electron
U=PEAllanite-(Y) x relectron= 333.18 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 14,180.81 (Gamma Ray American Petroleum Institute Units)
Concentration of Allanite-(Y) per GRapi unit = 70.52 (PPM)

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

Estimated Radioactivity from Allanite-(Y) - weak
Specimen
Size
Weight/Volume
(Sphere)
*
Calculated
Activity
Becquerels
(Bq)
Calculated
Activity
Curies (Ci)
Estimated
Activity
GR(api)
Estimated
Exposure
(mRem**)/hr
If Held in Hand
For One Hour
1000 gm / 7.99 cm 314,576 8.50E-06 14,180.81 4.66
100 gm / 3.71 cm 31,458 8.50E-07 1,418.08 0.47
10 gm / 1.72 cm 3,146 8.50E-08 141.81 0.05
1 gm / 7.99 mm 315 8.50E-09 14.18 0.00
0.1 gm / 3.71 mm 31 8.50E-10 1.42 0.00
0.01 gm / 1.72 mm 3 8.50E-11 0.14 0.00
0.001 gm / 0.80 mm 0 8.50E-12 0.01 0.00

Weight of pure Allanite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.75 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 ( 0.70 % Th) From Sum REE Elements (14.04 % REE)
 

Allanite-(Y) Classification

Help on  Dana Class: Dana Class: 58.02.01c.03 (58)Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups
  (58.02)with cations in [6] and higher coordination; single and double groups (n=1,2)
  (58.02.01c)Epidote group (Allanite subgroup)
 
58.02.01c.01 Allanite-(Ce) (Ce,Ca,Y)2(Al,Fe)3(SiO4)3(OH) P 21/m 2/m
 
58.02.01c.02 Allanite-(La)! Ca(REE,Ca)Al2(Fe,Fe)(SiO4)(Si2O7)O(OH) P 21/m 2/m
 
58.02.01c.03 Allanite-(Y) (Y,Ce,Ca)2(Al,Fe)3(SiO4)3(OH) P 21/m 2/m
 
58.02.01c.04 Dissakisite-(Ce) Ca(Ce,REE)(Mg,Fe)(Al,Fe)2Si3O12(OH) P 21/m 2/m
 
58.02.01c.05 Dissakisite-(La)! (Ca,Fe,Th,La)(La,REE,Ca)(Al,Cr,Ti)2(Mg,Fe,Al)Si3O12(OH,F)withLa>Ce P 21/m 2/m
 
58.02.01c.06 Manganiandrosite-(La)! (Mn,Ca)(La,Ce,Ca,Nd)AlMnMn(SiO4)(Si2O7)O(OH) P 21/m 2/m
 
58.02.01c.07 Ferriallanite-(Ce)! CaCe(Fe,Fe,Al)3[SiO4][Si2O7]O(OH) P 21/m 2/m
 
58.02.01c.08 Vastmanlandite-(Ce)! (Ce,La)3CaAl2Mg2[Si2O7][SiO4]3F(OH)2 P 21/m 2/m
 
58.02.01c.09 Manganiandrosite-(Ce)! (Mn,Ca)(Ce,REE)AlMnMn(Si2O7)(SiO4)O(OH) P 21/m 2/m
 
58.02.01c.10 Vanadoandrosite-(Ce)! (Mn,Ca)(REE)VAlMn(Si2O7)(SiO4)O(OH) P 21/m 2/m
Help on  Strunz Class: Strunz Class: 09.BG.05b 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BG -Sorosilicates with mixed SiO4 and Si2O7 groups;
 
09.BG.05b Allanite-(La)! Ca(REE,Ca)Al2(Fe,Fe)(SiO4)(Si2O7)O(OH) P 21/m 2/m
 
09.BG.05b Allanite-(Y) (Y,Ce,Ca)2(Al,Fe)3(SiO4)3(OH) P 21/m 2/m
 
09.BG.05b Allanite-(Ce) (Ce,Ca,Y)2(Al,Fe)3(SiO4)3(OH) P 21/m 2/m
 
09.BG.05b Manganiandrosite-(La)! (Mn,Ca)(La,Ce,Ca,Nd)AlMnMn(SiO4)(Si2O7)O(OH) P 21/m 2/m
 
09.BG.05b Dissakisite-(Ce) Ca(Ce,REE)(Mg,Fe)(Al,Fe)2Si3O12(OH) P 21/m 2/m
 
09.BG.05b Manganiandrosite-(Ce)! (Mn,Ca)(Ce,REE)AlMnMn(Si2O7)(SiO4)O(OH) P 21/m 2/m
 
09.BG.05b Vanadoandrosite-(Ce)! (Mn,Ca)(REE)VAlMn(Si2O7)(SiO4)O(OH) P 21/m 2/m
 
09.BG.05b Dissakisite-(La)! (Ca,Fe,Th,La)(La,REE,Ca)(Al,Cr,Ti)2(Mg,Fe,Al)Si3O12(OH,F)withLa>Ce P 21/m 2/m
 
09.BG.05b Ferriallanite-(Ce)! CaCe(Fe,Fe,Al)3[SiO4][Si2O7]O(OH) P 21/m 2/m
 
09.BG.05b Uedaite-(Ce)! MnCeAl2Fe(Si2O7)(SiO4)O(OH) P 21/m 2/m
 

Other Allanite-(Y) Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Mason68) OPTIC PROP.(Heinrich65)
Help on See Also: See Also: Links to other databases for Allanite-(Y) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

Search for Allanite-(Y) using:

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

Visit our Advertisers for Allanite-(Y) :

A Bijoux Google Search for Allanite-(Y)
Adam's Minerals Google Search for Allanite-(Y)
Cape Minerals Google Search for Allanite-(Y)
Dakota Matrix Minerals Google Search for Allanite-(Y)
Excalibur Mineral Corp. Google Search for Allanite-(Y)
Exceptional Minerals Google Search for Allanite-(Y)
John Betts Fine Minerals Search for Allanite-(Y)
McDougall Minerals Google Search for Allanite-(Y)
Mineral News Website Link
Rock and Mineral Shows Google Search for Allanite-(Y)
Weinrich Minerals, Inc. Google Search for Allanite-(Y)

Ask about Allanite-(Y) 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 Allanite-(Y) Specimen Label here :

Allanite-(Y)

(Y,Ce,Ca)2(Al,Fe+++)3(SiO4)3(OH)
Dana No: 58.02.01c.03 Strunz No: 09.BG.05b
Locality:

 

Notes: