![]() |
Downeyite Mineral Data |
General Downeyite Information |
||
![]() |
SeO2 | |
![]() |
Molecular Weight = 110.96 gm | |
Selenium 71.16 % Se 100.00 % SeO2 | ||
Oxygen 28.84 % O | ||
______ ______ | ||
100.00 % 100.00 % = TOTAL OXIDE | ||
![]() |
SeO2 | |
![]() |
Sublimation product of gases escaping through vents in actively burning culm banks in anthracite coal deposits; forms at about 200 deg C near the vents. | |
![]() |
Approved IMA 1977 | |
![]() |
Glen Lyon, Luzerne Co.,Pennsylvania, USA Link to MinDat.org Location Data. | |
![]() |
Named for Wayne F. Downey, Jr., of Harrisburg, Pennsylvania, USA, who first collected the mineral. | |
![]() |
Downeyite + Pronunciation ![]() |
|
![]() |
ICSD 72366 | |
PDF 22-1314 | ||
Downeyite Crystallography |
||
![]() |
a:c = 1:0.60645 | |
![]() |
a = 8.36, c = 5.07, Z = 8; V = 354.34 Den(Calc)= 4.16 | |
![]() |
Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: P 4/mbc | |
![]() |
By Intensity(I/Io): 3.36(1), 4.64(0.85), 5.28(0.75), | |
Physical Properties of Downeyite |
||
![]() |
Colorless. | |
![]() |
4.146 | |
![]() |
Transparent | |
![]() |
Adamantine | |
![]() |
white | |
Optical Properties of Downeyite |
||
![]() |
NCalc= 1.81 - from Gladstone-Dale relationship (KC = 0.195) where Ncalc=Dcalc*KC+1 NCalc= 1.81 - from Gladstone-Dale relationship (KC = 0.195) where Ncalc=Dmeas*KC+1 |
|
Calculated Properties of Downeyite |
||
![]() |
Bulk Density (Electron Density)=3.75 gm/cc note: Specific Gravity of Downeyite =4.16 gm/cc. |
|
![]() |
Fermion Index = 0.05 Boson Index = 0.95 |
|
![]() |
PEDowneyite = 55.58 barns/electron U=PEDowneyite x rElectron Density= 208.36 barns/cc. |
|
![]() |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Downeyite is Not Radioactive |
|
Downeyite Classification |
||
![]() |
04.04.03.01 (04)Simple Oxides | |
(04.04)with a cation charge of 4+ (A++++ O2) | ||
(04.04.03)Dana Group | ||
![]() |
04.DE.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate | |
04.D - Metal:Oxygen = 1:2 and similar | ||
04.DE -With medium-sized cations; with various polyhedra | ||
Other Downeyite Information |
||
![]() |
NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) | |
![]() |
Links to other databases for Downeyite : 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 - WWW-MINCRYST Search for Downeyite using: Visit our Advertisers for Downeyite : Ask about Downeyite here : Print or Cut-and-Paste your Downeyite 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.