Iowaite Mineral Data + Say IOWAITE


[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 Iowaite Information
Help on Chemical Formula: Chemical Formula: Mg4Fe+++(OH)8OCl·2-4(H2O)
Help on Composition: Composition: 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
Help on Empirical Formula: Empirical Formula: Mg4Fe3+(OH)8OCl·3(H2O)
Help on Environment: Environment: Veinlets in serpentinite.
Help on IMA Status: IMA Status: Approved IMA 1967
Help on Locality: Locality: Sioux County, Iowa. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Synonym: Synonym: ICSD 15202
  PDF 20-500
 

Iowaite Image

Click Here for Larger Iowaite Image in a New Browser Window Images:
Click Here for Larger Iowaite Image

Iowaite

Comments: Floater crystal of iowaite.
Location: Palabora Mine, Transvaal, South Africa. Scale: Crystal size 1.2 cm.
© John Veevaert

Iowaite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:7.86149
Help on Cell Dimensions: Cell Dimensions: a = 3.119, c = 24.52, Z = 0.6; V = 206.58 Den(Calc)= 1.90
Help on Crystal System: Crystal System: Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.109(1), 4.047(0.4), 2.363(0.27),
Click Here for Large Iowaite Structure Window Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
 Help on Above


Allmann R , Donnay J D H , American Mineralogist , 54 (1969) p.296-299, About the structure of iowaite

View Additional jPOWD Structure files for Iowaite
[1]
 

Physical Properties of Iowaite

Help on Cleavage: Cleavage: [0001] Perfect
Help on Color: Color: Bluish green, Greenish white, Honey yellow.
Help on Density: Density: 2.09 - 2.11, Average = 2.09
Help on Diaphaniety: Diaphaniety: Transparent
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 1.5 - Between Talc and Gypsum
Help on Luster: Luster: Greasy (Oily)
Help on Streak: Streak: white
 

Optical Properties of Iowaite

Help on Gladstone-Dale: Gladstone-Dale: 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
Help on Optical Data: Optical Data: Uniaxial (-), e=1.533-1.543, w=1.543-1.561, bire=0.0100-0.0180.
 

Calculated Properties of Iowaite

Help on Electron Density: Electron Density:

relectron=1.94 gm/cc
note: rIowaite =1.90 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.02787
Boson Index = 0.97213
Help on Photoelectric: Photoelectric:

PEIowaite = 5.25 barns/electron
U=PEIowaite x relectron= 10.17 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Iowaite is Not Radioactive
 

Iowaite Classification
Help on Dana Class: Dana Class: 6.4.5.1 (6)Hydroxides and Oxides Containing Hydroxyl
  (6.4)containing multiple cations
  (6.4.5)Dana Group
 
6.4.5.1 Iowaite Mg4Fe(OH)8OCl·2-4(H2O) R 3m 3 2/m
 
6.4.5.2 Woodallite! Mg6Cr2(OH)16Cl2·4(H2O) R 3m 3 2/m
Help on Strunz Class: Strunz Class: IV/F.05-20 IV - Oxides
  IV/F - Hydroxides and oxidic hydrates, water-bearing oxides with layered structure
  IV/F.05 - Meixnerite - Muskoxite series
 
IV/F.05-10 Meixnerite Mg6Al2(OH)18·4(H2O) R 3m 3 2/m
 
IV/F.05-15 Woodallite! Mg6Cr2(OH)16Cl2·4(H2O) R 3m 3 2/m
 
IV/F.05-20 Iowaite Mg4Fe(OH)8OCl·2-4(H2O) R 3m 3 2/m
 
IV/F.05-30 Muskoxite Mg7Fe4O13·10(H2O) Unk (pseudo HEX-R) Trig
 

Other Iowaite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: 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:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Iowaite :
AA Mineral Specimens
B and L Minerals
Crystal Vaults
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Iowaite Mineral Data :

Ask about Iowaite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Iowaite Specimen Label here :

Iowaite

Mg4Fe+++(OH)8OCl·2-4(H2O)
Dana No: 6.4.5.1 Strunz No: IV/F.05-20
Locality:

 

Notes:

 
 
   
 
Go To Webmineral Home Crystallography X-Ray D-Spacing Table Chemical Composition
Dana Classification Strunz Classification Table of Mineral Properties Alphabetical Listing of Minerals
Search Webmineral Photo Gallery of Mineral Images Help Files Links