Iowaite Mineral Data + Say IOWAITE

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
A-Rocks Auction
Adams Minerals
B and L Minerals
Dakota Matrix
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
Minernet.it
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