![]() |
Jeffreyite Mineral Data |
General Jeffreyite Information |
||
![]() |
(Ca,Na)2(Be,Al)Si2(O,OH)7 | |
![]() |
Molecular Weight = 255.30 gm | |
Sodium 4.50 % Na 6.07 % Na2O | ||
Calcium 23.55 % Ca 32.95 % CaO | ||
Beryllium 2.65 % Be 7.35 % BeO | ||
Aluminum 2.64 % Al 4.99 % Al2O3 | ||
Silicon 22.00 % Si 47.07 % SiO2 | ||
Hydrogen 0.79 % H 7.06 % H2O | ||
Oxygen 43.87 % O | ||
______ ______ | ||
100.00 % 105.48 % = TOTAL OXIDE | ||
![]() |
Ca1.5Na0.5Be0.75Al0.25Si2O5(OH)2 | |
![]() |
In a cavity in a highly calcium-metasomatized granite dike. | |
![]() |
Approved IMA 1984 | |
![]() |
Jeffrey mine, Asbestos, Quebec, Canada. Link to MinDat.org Location Data. | |
![]() |
Named for the locality. | |
![]() |
Jeffreyite + Pronunciation ![]() |
|
![]() |
IMA1982-075 | |
Jeffreyite Crystallography |
||
![]() |
a:b:c =1:1:2.712 | |
![]() |
a = 14.9, b = 14.9, c = 40.41, Z = 64; V = 8,971.42 Den(Calc)= 3.02 | |
![]() |
Orthorhombic - Disphenoidal H-M Symbol (2 2 2) Space Group: C 2221 | |
![]() |
By Intensity(I/Io): 2.774(1), 2.993(0.9), 2.541(0.7), | |
Physical Properties of Jeffreyite |
||
![]() |
{001} Perfect, {110} Perfect | |
![]() |
Colorless. | |
![]() |
2.99 | |
![]() |
Transparent | |
![]() |
Brittle - Generally displayed by glasses and most non-metallic minerals. | |
![]() |
5 - Apatite | |
![]() |
Vitreous (Glassy) | |
![]() |
white | |
Optical Properties of Jeffreyite |
||
![]() |
CI meas= 0.077 (Fair) - where the CI = (1-KPDmeas/KC) CI calc= 0.086 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2107,KPDmeas= 0.2128,KC= 0.2306 Ncalc = 1.69 - 1.7 |
|
![]() |
Biaxial (-), a=1.625, b=1.641, g=1.643, bire=0.0180, 2V(Calc)=38, 2V(Meas)=40. | |
Calculated Properties of Jeffreyite |
||
![]() |
Bulk Density (Electron Density)=2.99 gm/cc note: Specific Gravity of Jeffreyite =2.99 gm/cc. |
|
![]() |
Fermion Index = 0.03 Boson Index = 0.97 |
|
![]() |
PEJeffreyite = 3.89 barns/electron U=PEJeffreyite x rElectron Density= 11.64 barns/cc. |
|
![]() |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Jeffreyite is Not Radioactive |
|
Jeffreyite Classification |
||
![]() |
55.04.02.03 (55)Sorosilicate Si2O7 Groups, Generally with No Additional Anions | |
(55.04)with cations in [8] and lower coordination | ||
(55.04.02)Fresnoite group | ||
![]() |
09.BB.10 09 - SILICATES (Germanates) | |
09.B - Sorosilicates | ||
09.BB -Si2O7 groups, without non-tetrahedral anions; | ||
Other Jeffreyite Information |
||
![]() |
NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | |
![]() |
Links to other databases for Jeffreyite : 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 Search for Jeffreyite using: Visit our Advertisers for Jeffreyite : Ask about Jeffreyite here : Print or Cut-and-Paste your Jeffreyite Specimen Label here :
|
|
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.