Eylettersite Mineral Data

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



[Content and History] [Recent Issues] [Back Issues] [Subscriptions] [Contacts]
See Also: [Diamond Crystals] [Excalibur Minerals] [Hudson Institute] [Minerals on CDROM]
Mineral News was founded some twenty years ago and has developed a following of
avid mineral collectors seeking timely information about new finds and other items
of interest to the collector community. Articles are solicited from collector and scientific authors.


General Eylettersite Information

Help on Chemical Formula: Chemical Formula: (Th,Pb)1-xAl3(PO4,SiO4)2(OH)6 (?)
Help on Composition: Composition: Molecular Weight = 481.10 gm
   Thorium     19.29 %  Th   21.95 % ThO2
   Aluminum    20.19 %  Al   38.15 % Al2O3
   Silicon      0.58 %  Si    1.25 % SiO2
   Phosphorus   8.37 %  P    19.18 % P2O5
   Hydrogen     1.70 %  H    15.17 % H2O
   Lead         4.31 %  Pb    4.64 % PbO
   Oxygen      45.56 %  O
              ______        ______ 
              100.00 %      100.33 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Th0.4Pb0.1Al3.6(PO4)1.3(SiO4)0.10.5(H4)0.5(O4)(OH)6.1
Help on Environment: Environment: Alteration product of thorian crandallite in a phosphate-rich granite pegmatite.
Help on IMA Status: IMA Status: Approved IMA 1972
Help on Locality: Locality: Kobokobo pegmatite, Lusungu River district, Kivu Province, Zaire. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Mme. Van Wambeke, wife of the discoverer.
Help on Name Pronunciation: Name Pronunciation: Eylettersite + Pronunciation Say EYLETTERSITE
 

Search for Eylettersite Images

Click Here To Search Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.
  

Eylettersite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:2.38912
Help on Cell Dimensions: Cell Dimensions: a = 6.99, c = 16.7, Z = 3; V = 706.65 Den(Calc)= 3.39
Help on Crystal System: Crystal System: Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.95(1), 3.51(0.6), 5.7(0.55),
 

Physical Properties of Eylettersite

Help on Cleavage: Cleavage: None
Help on Color: Color: Cream white.
Help on Density: Density: 3.38 - 3.44, Average = 3.41
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Nodular - Tuberose forms having irregular protuberances over the surface.
Help on Habit: Habit: Pulverulent - Forms a loose, poorly-coherent powdery mass.
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luminescence: Luminescence: Fluorescent, Short UV=greenish yellow, Long UV=weak cream brown.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Eylettersite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.114 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.109 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1881,KPDmeas= 0.187,KC= 0.2111
Ncalc = 1.71 - 1.73
Help on Optical Data: Optical Data: Uniaxial (-), e=1.615-1.66.
 

Calculated Properties of Eylettersite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.24 gm/cc
note: Specific Gravity of Eylettersite =3.39 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEEylettersite = 495.53 barns/electron
U=PEEylettersite x relectron=1,603.40 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 392,835.20 (Gamma Ray American Petroleum Institute Units)
Concentration of Eylettersite per GRapi unit = 2.55 (PPM)

Eylettersite 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) 77.43 ± 19.36 grams of pure Eylettersite .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 7742.9 ±1935.7 grams of pure Eylettersite .

Estimated Radioactivity from Eylettersite - 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 / 8.26 cm 8,642,961 2.34E-04 392,835.20 129.15
100 gm / 3.83 cm 864,296 2.34E-05 39,283.52 12.92
10 gm / 1.78 cm 86,430 2.34E-06 3,928.35 1.29
1 gm / 8.26 mm 8,643 2.34E-07 392.84 0.13
0.1 gm / 3.83 mm 864 2.34E-08 39.28 0.01
0.01 gm / 1.78 mm 86 2.34E-09 3.93 0.00
0.001 gm / 0.83 mm 9 2.34E-10 0.39 0.00

Weight of pure Eylettersite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.39 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
 

Eylettersite Classification
Help on Dana Class: Dana Class: 41.05.12.02 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.05)where (A B)2 (XO4) Zq
  (41.05.12)Waylandite Group
 
41.05.12.01 Waylandite BiAl3(PO4)2(OH)6 R 3m 3 2/m
 
41.05.12.02 Eylettersite (Th,Pb)1-xAl3(PO4,SiO4)2(OH)6(?) R 3m 3 2/m
 
41.05.12.03 Zairite Bi(Fe,Al)3(PO4)2(OH)6 R 3m 3 2/m
 
41.05.12.04 Arsenogorceixite! BaAl3AsO3(OH)(AsO4,PO4)(OH,F)6 R 3m 3 2/m
Help on Strunz Class: Strunz Class: 08.BL.13 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BL -With medium-sized and large cations, (OH, etc.):RO4 = 3:1
 
08.BL.13 Arsenoflorencite-(Ce) (Ce,La)Al3(AsO4)2(OH)6 R 3m 3 2/m
 
08.BL.13 Eylettersite (Th,Pb)1-xAl3(PO4,SiO4)2(OH)6(?) R 3m 3 2/m
 
08.BL.13 Arsenoflorencite-(La)* (La,Sr)Al3(AsO4,SO4,PO4)2(OH)6 R 3m 3m
 
08.BL.13 Arsenoflorencite-(Nd)* (Nd,La,Ce,Ba)(Al,Fe)3(AsO4,PO4)2(OH)6 R 3m 3m
 
08.BL.13 Florencite-(Ce) CeAl3(PO4)2(OH)6 R 3m 3 2/m
 
08.BL.13 Florencite-(La) (La,Ce)Al3(PO4)2(OH)6 R 3m 3 2/m
 
08.BL.13 Florencite-(Nd) (Nd,Ce)Al3(PO4)2(OH)6 R 3m 3 2/m
 
08.BL.13 Graulichite-(Ce)! CeFe3(AsO4)2(OH)6 R 3m 3 2/m
 
08.BL.13 Waylandite BiAl3(PO4)2(OH)6 R 3m 3 2/m
 
08.BL.13 Zairite Bi(Fe,Al)3(PO4)2(OH)6 R 3m 3 2/m
 

Other Eylettersite Information
Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(AntBidBlaNic4) OPTIC PROP.(AntBidBlaNic4)
Help on See Also: See Also: Links to other databases for Eylettersite :
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 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - Uranium Minerals

Search for Eylettersite using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [bing] [GeoScienceWorld] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Eylettersite :

B & L Fine Minerals

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Excalibur Minerals

Exceptional Minerals

Fabre Minerals

John Betts Fine Minerals

Lapis Mineral Journal

Mineral News

UV Tools

Wrights Rock Shop

Translate Eylettersite Mineral Data :

Ask about Eylettersite 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 Eylettersite Specimen Label here :

Eylettersite

(Th,Pb)1-xAl3(PO4,SiO4)2(OH)6 (?)
Dana No: 41.05.12.02 Strunz No: 08.BL.13
Locality:

 

Notes: