![]() |
Iowaite Mineral Data |
General Iowaite Information |
|||
![]() |
Mg4Fe+++(OH)8OCl•2-4(H2O) | ||
![]() |
Molecular Weight = 394.62 gm | ||
Magnesium 24.64 % Mg 40.85 % MgO | |||
Iron 14.15 % Fe 20.23 % Fe2O3 | |||
Hydrogen 3.58 % H 31.96 % H2O | |||
Chlorine 8.98 % Cl 8.98 % Cl | |||
- % Cl -2.03 % -O=Cl2 | |||
Oxygen 48.65 % O | |||
______ ______ | |||
100.00 % 100.00 % = TOTAL OXIDE | |||
![]() |
Mg4Fe3+(OH)8OCl•3(H2O) | ||
![]() |
Veinlets in serpentinite. | ||
![]() |
Approved IMA 1967 | ||
![]() |
Sioux County, Iowa. Link to MinDat.org Location Data. | ||
![]() |
Named for the locality. | ||
![]() |
Iowaite ![]() |
||
![]() |
ICSD 15202 | ||
PDF 20-500 | |||
Iowaite Image | |||
![]() |
|
||
Iowaite Crystallography |
|||
![]() |
a:c = 1:7.86149 | ||
![]() |
a = 3.119, c = 24.52, Z = 0.6; V = 206.58 Den(Calc)= 1.90 | ||
![]() |
Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m | ||
![]() |
By Intensity(I/Io): 8.109(1), 4.047(0.4), 2.363(0.27), | ||
Physical Properties of Iowaite |
|||
![]() |
{0001} Perfect | ||
![]() |
Bluish green, Greenish white, Honey yellow. | ||
![]() |
2.09 - 2.11, Average = 2.09 | ||
![]() |
Transparent | ||
![]() |
Platy - Sheet forms (e.g. micas). | ||
![]() |
1.5 - Between Talc and Gypsum | ||
![]() |
Greasy (Oily) | ||
![]() |
white | ||
Optical Properties of Iowaite |
|||
![]() |
CI meas= 0.081 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= -0.015 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2868,KPDmeas= 0.2595,KC= 0.2825 Ncalc = 1.54 - 1.6 |
||
![]() |
Uniaxial (-), e=1.533-1.543, w=1.543-1.561, bire=0.0100-0.0180. | ||
Calculated Properties of Iowaite |
|||
![]() |
Bulk Density (Electron Density)=1.94 gm/cc note: Specific Gravity of Iowaite =1.90 gm/cc. |
||
![]() |
Fermion Index = 0.02 Boson Index = 0.98 |
||
![]() |
PEIowaite = 5.25 barns/electron U=PEIowaite x rElectron Density= 10.17 barns/cc. |
||
![]() |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Iowaite is Not Radioactive |
||
Iowaite Classification |
|||
![]() |
06.04.05.01 (06)Hydroxides and Oxides Containing Hydroxyl | ||
(06.04)containing multiple cations | |||
(06.04.05)Dana Group | |||
![]() |
04.FL.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate | ||
04.F - Hydroxides (without V or U) | |||
04.FL -Hydroxides with H2O � (OH); sheets of edge-sharing octahedra | |||
Other Iowaite Information |
|||
![]() |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
![]() |
Links to other databases for Iowaite : 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 Iowaite using: Visit our Advertisers for Iowaite : Ask about Iowaite here : Print or Cut-and-Paste your Iowaite 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.