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Iowaite Mineral Data + |
General Iowaite Information |
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| 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. | |||
| ICSD 15202 | |||
| PDF 20-500 | |||
Iowaite Image | |||
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Iowaite Crystallography |
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| a:c = 1:7.86149 | |||
| a = 3.119, c = 24.52, Z = 0.6; V = 206.58 Den(Calc)= 1.90 | |||
| Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m | |||
| By Intensity(I/Io): 8.109(1), 4.047(0.4), 2.363(0.27), | |||
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Mouse |
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Physical Properties of Iowaite |
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| [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 |
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| 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 |
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| Uniaxial (-), e=1.533-1.543, w=1.543-1.561, bire=0.0100-0.0180. | |||
Calculated Properties of Iowaite |
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relectron=1.94 gm/cc |
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| Fermion Index = 0.02787 Boson Index = 0.97213 |
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PEIowaite = 5.25 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Iowaite is Not Radioactive |
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Iowaite Classification |
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| 6.4.5.1 (6)Hydroxides and Oxides Containing Hydroxyl | |||
| (6.4)containing multiple cations | |||
| (6.4.5)Dana Group | |||
| IV/F.05-20 IV - Oxides | |||
| IV/F - Hydroxides and oxidic hydrates, water-bearing oxides with layered structure | |||
| IV/F.05 - Meixnerite - Muskoxite series | |||
Other Iowaite Information |
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| 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 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris Search for Iowaite using: Visit our Advertisers for Iowaite : Translate Iowaite Mineral Data : Ask about Iowaite here : Print or Cut-and-Paste your Iowaite Specimen Label here :
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