[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 Eylettersite Information(Th,Pb)1-xAl3(PO4,SiO4)2(OH)6 (?) |
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 |
Th0.4Pb0.1Al3.6(PO4)1.3(SiO4)0.10.5(H4)0.5(O4)(OH)6.1 |
Alteration product of thorian crandallite in a phosphate-rich granite pegmatite. |
Approved IMA 1972 |
Kobokobo pegmatite, Lusungu River district, Kivu Province, Zaire. Link to MinDat.org Location Data. |
Named for Mme. Van Wambeke, wife of the discoverer. |
Eylettersite + Pronunciation |
| | Search for Eylettersite Images
|
|
| | Eylettersite Crystallographya:c = 1:2.38912 |
a = 6.99, c = 16.7, Z = 3; V = 706.65 Den(Calc)= 3.39 |
Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m |
By Intensity(I/Io): 2.95(1), 3.51(0.6), 5.7(0.55), |
| Physical Properties of EylettersiteNone |
Cream white. |
3.38 - 3.44, Average = 3.41 |
Transparent to Translucent |
Nodular - Tuberose forms having irregular protuberances over the surface. |
Pulverulent - Forms a loose, poorly-coherent powdery mass. |
3-4 - Calcite-Fluorite |
Fluorescent, Short UV=greenish yellow, Long UV=weak cream brown. |
Vitreous (Glassy) |
white |
| Optical Properties of EylettersiteCI 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 Uniaxial (-), e=1.615-1.66. |
| Calculated Properties of EylettersiteBulk Density (Electron Density)=3.24 gm/cc |
note: Specific Gravity of Eylettersite =3.39 gm/cc. Fermion Index = 0.01 |
Boson Index = 0.99 PEEylettersite = 495.53 barns/electron |
U=PEEylettersite x relectron=1,603.40 barns/cc. |
GRapi = 392,835.20 (Gamma Ray American Petroleum Institute Units)
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 .
Weight of pure Eylettersite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.39 gm/cc.* | Eylettersite Classification41.05.12.02 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen |
|
(41.05)where (A B)2 (XO4) Zq |
|
(41.05.12)Waylandite Group |
|
|
|
|
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 |
|
|
|
|
|
|
|
|
|
|
| Other Eylettersite InformationNAME( AntBidBlaNic4) PHYS. PROP.(AntBidBlaNic4) OPTIC PROP.(AntBidBlaNic4) |
Links to other databases for Eylettersite : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - Google Images 6 - Google Scholar 7 - Handbook of Mineralogy (MinSocAm) 8 - Handbook of Mineralogy (UofA) 9 - MinDAT 10 - MinMax(Deutsch) 11 - MinMax(English) 12 - Mineralienatlas (Deutsch) 13 - QUT Mineral Atlas 14 - Ruff.Info 15 - Uranium Minerals Search for Eylettersite using: Visit our Advertisers for Eylettersite : AA Mineral SpecimensB & L Fine Minerals Crystalarium.com Dan Weinrich Fine Minerals Dan Weinrich Auctions Dakota Matrix Desert Winds Gems and Minerals Excalibur Minerals Exceptional Minerals Fabre Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club Wrights Rock Shop Translate Eylettersite Mineral Data : Ask about Eylettersite here : Print or Cut-and-Paste your Eylettersite Specimen Label here :
| |
|
| | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||