Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Mineral Chatroom The Mindat Store

Iowaite

This page is currently not sponsored. Click here to sponsor this page.
Big Photo

Palabora mine, Loolekop, Phalaborwa, Limpopo Province, South Africa
© Vincent Bourgoin

Show Iowaite Photos (12)



Formula:
Mg
 
6
Fe
3+
2
(OH)
 
16
Cl
 
2
 · 4H
 
2
O
System:TrigonalHardness:1½
Member of:Hydrotalcite Group


Hydrotalcite Group.

Bluish green, becoming pale green with a rusty red tint on exposure to air (alteration to pyroaurite).

Classification of Iowaite

IMA status:Approved
Strunz 8th edition ID:4/F.05-20
Nickel-Strunz 10th (pending) edition ID:4.FL.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
L : Hydroxides with H2O +- (OH); sheets of edge-sharing octahedra
Dana 8th edition ID:6.4.5.1

6 : HYDROXIDES AND OXIDES CONTAINING HYDROXYL
4 : Miscellaneous
Hey's CIM Ref.:8.11.8

8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
11 : Halides of Fe and Ni
mindat.org URL:http://www.mindat.org/min-2038.html
Please feel free to link to this page.

Type Occurrence of Iowaite

Type Locality:Unnamed drill core, Sioux Co., Iowa, USA
Year of Discovery:1967

Physical Properties of Iowaite

Hardness (Mohs):1½

Crystallography of Iowaite

Crystal System:Trigonal
Class (H-M):3m (3 2/m) - Hexagonal Scalenohedral
Space Group:R3m {R3 2/m}

Optical Data of Iowaite

Type:Uniaxial (-)
RI values: nω = 1.543 - 1.561 nε = 1.533 - 1.543
Maximum Birefringence:δ = 0.010 - 0.018

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low

Chemical Properties of Iowaite

Formula:
Mg
 
6
Fe
3+
2
(OH)
 
16
Cl
 
2
 · 4H
 
2
O
Essential elements:Cl, Fe, H, Mg, O
All elements listed in formula:Cl, Fe, H, Mg, O

Relationship of Iowaite to other Species

Member of:Hydrotalcite Group
Other Members of Group:

- +
Desautelsite
Mg
 
6
Mn
3+
2
(CO
 
3
)(OH)
 
16
 · 4H
 
2
O
Hydrotalcite
Mg
 
6
Al
 
2
(CO
 
3
)(OH)
 
16
 · 4H
 
2
O
Hydrowoodwardite
(Cu,Al)
 
9
(SO
 
4
)
 
2
(OH)
 
18
 · nH
 
2
O
Pyroaurite
Mg
 
6
Fe
3+
2
(CO
 
3
)(OH)
 
16
 · 4H
 
2
O
Stichtite
Mg
 
6
Cr
 
2
(CO
 
3
)(OH)
 
16
 · 4H
 
2
O
Takovite
Ni
 
6
Al
 
2
(CO
 
3
)(OH)
 
16
 · 4H
 
2
O
Wermlandite
Mg
 
7
(Ca,Mg)(Al,Fe)
 
2
(SO
 
4
)
 
2
(OH)
 
18
 · 12H
 
2
O
Woodwardite
Cu
 
4
Al
 
2
(SO
 
4
)(OH)
 
12
 · 2-4H
 
2
O
Zincowoodwardite
Zn
 
1-x
Al
 
x
(SO
 
4
)
 
x/2
(OH)
 
2
 · nH
 
2
O (x=0.32-0.50)
Related Minerals - Nickel-Strunz Grouping):

- +
4.FL.05Woodallite
Mg
 
6
Cr
 
2
(OH)
 
16
Cl
 
2
 · 4H
 
2
O
4.FL.05Jamborite
(Ni
2+
 
,Ni
3+
 
,Co,Fe)(OH)
 
2
(OH,S,H
 
2
O)
4.FL.05Meixnerite
Mg
 
6
Al
 
2
(OH)
 
18
 · 4H
 
2
O
4.FL.05Muskoxite
Mg
 
7
Fe
 
4
O
 
13
 · 10H
 
2
O
4.FL.05Fougèrite
(Fe
2+
 
,Mg)
 
6
Fe
3+
2
(OH)
 
18
 · 4H
 
2
O
4.FL.10Hydrocalumite
Ca
 
2
Al(OH)
 
7
 · 2H
 
2
O
4.FL.15Kuzelite
Ca
 
4
Al
 
2.4
(OH)
 
12.8
(SO
 
4
) · 6H
 
2
O
4.FL.20Aurorite
(Mn
2+
 
,Ag,Ca)Mn
4+
3
O
 
7
 · 3H
 
2
O
4.FL.20Chalcophanite
(Zn,Fe,Mn)Mn
 
3
O
 
7
 · 3H
 
2
O
4.FL.20Ernienickelite
NiMn
 
3
O
 
7
 · 3H
 
2
O
4.FL.20Jianshuiite
(Mg,Mn)Mn
 
3
O
 
7
 · 3H
 
2
O
4.FL.25Woodruffite
Zn(Mn
4+
 
,Mn
3+
 
)
 
5
O
 
10
·3½H
 
2
O
4.FL.30Asbolane
(Ni,Co)
 
2-x
Mn
4+
 
(O,OH)
 
4
 · nH
 
2
O
4.FL.35Buserite
Na
 
4
Mn
 
14
O
 
27
 · 21H
 
2
O
4.FL.40Ranciéite
(Ca,Mn)Mn
 
4
O
 
9
 · 3H
 
2
O
4.FL.40Takanelite
(Mn,Ca)Mn
 
4
O
 
9
 · H
 
2
O
4.FL.45Birnessite
(Na,Ca)
 
0.5
(Mn
4+
 
,Mn
3+
 
)
 
2
O
 
4
 · 1.5H
 
2
O
4.FL.55Cianciulliite
Mn(Mg,Mn)
 
2
Zn
 
2
(OH)
 
10
 · 2-4H
 
2
O
4.FL.60Jensenite
Cu
 
3
[TeO
 
6
] · 2H
 
2
O
4.FL.65Leisingite
Cu(Mg,Cu,Fe,Zn)
 
2
[TeO
 
6
] · 6H
 
2
O
4.FL.70Akdalaite
4Al
 
2
O
 
3
 · H
 
2
O
4.FL.75Cafetite
(Ca,Mg)(Fe,Al)
 
2
Ti
 
4
O
 
12
 · 4H
 
2
O
4.FL.80Mourite
UMo
 
5
O
 
12
(OH)
 
10
4.FL.85Deloryite
Cu
 
4
(UO
 
2
)(MoO
 
4
)
 
2
(OH)
 
6
Related Minerals - Hey's Index Grouping:

- +
8.11.1Molysite
FeCl
 
3
8.11.2Hydromolysite
FeCl
 
3
 · 6H
 
2
O
8.11.3Rokühnite
FeCl
 
2
 · 2H
 
2
O
8.11.4Douglasite
K
 
2
[Fe
2+
 
Cl
 
4
(OH
 
2
)
 
2
]
8.11.5Erythrosiderite
K
 
2
[Fe
3+
 
Cl
 
5
(OH
 
2
)]
8.11.6Rinneite
K
 
3
Na[FeCl
 
6
]
8.11.7Kremersite
(NH
 
4
,K)
 
2
[Fe
3+
 
Cl
 
5
(H
 
2
O)]
8.11.9Nickelbischofite
NiCl
 
2
 · 6H
 
2
O
8.11.10Lawrencite
(Fe
2+
 
,Ni)Cl
 
2

Other Names for Iowaite

Synonyms:
IMA1967-002
Other Languages:
German:Iowait
Russian:Айоваит
Spanish:Iowaita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Iowaite

Reference List:

- +
American Mineralogist: 79: 1014: 52: 1261-1271.

Mineralogical Magazine (1994): 58: 79-85.

Internet Links for Iowaite

Search Engines:
  • Look for Iowaite on Google
  • Look for Iowaite images on Google
    • External Links:
  • Look for Iowaite on Webmineral
  • Look for Iowaite on Athena Mineralogy[Link Broken?]
  • Look for Iowaite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Iowaite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Search for Iowaite from all mineral dealers at minfind.com
  • High-end worldwide specimens & outstanding customer service
  • Fine Minerals from Weinrich Minerals, Inc.
  • Buy RARE Minerals from Rocks of Africa
  • Fabre Minerals - search for Iowaite specimens
  • Top quality minerals from Kristalle of California
  • Rare and Unusual minerals at Mineralogical Research Company
  • The Arkenstone - Fine Minerals
  • Pricedownminerals.com - Reverse Auctions and Shop
  • Edwards Minerals - Fine Specimens
  • Buy fine minerals and gemstones from Pala International
  • SpiriferMinerals.com - high quality low prices
    • Jobs:
  • Mining & Geology Jobs

    • Localities for Iowaite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Australia
     
    • Western Australia
      • Wiluna Shire
        • Mount Keith
    		[AmMin 87:182]
    Canada
     
    • Québec
      • Estrie
        • Les Sources RCM
          • Asbestos
    		Horváth & Spertini (2008 & 2009)
    Pacific Ocean
     
    • Mariana forearc
    		Dietrich Heling and Alexander Schwarz (1992) IOWAITE IN SERPENTINITE MUDS AT SITES 778, 779, 780, AND 784: A POSSIBLE CAUSE FOR THE LOW CHLORINITY OF PORE WATERS. Proceedings of the Ocean Drilling Program, Scientific Results, Vol. 125
    Poland
     
    • Upper Silesia (Śląskie)
      • Zawiercie District
    		Koszowska E., Salata D. 2001: Minerals of the hydrotalcite group in metasomatically altered carbonate rocks from Zawiercie, S Poland. Mineralogia Polonica, vol. 32, no 1, 69-84
    Russia
     
    • Eastern-Siberian Region
      • Prebaikalia (Pribaikal'e)
        • Irkutskaya Oblast'
          • Zheleznogorsk
    		Mazurov, M.P., Grishina, S.N., Istomin, V.E., and Titov, A.T. (2007): Geology of Ore Deposits 49(4), 271-284.; Mazurov et al (2007) Geology of Ore Deposits, 49, 271–284.
      • Saha Republic (Sakha Republic; Yakutia)
        • Daldyn-Alakit kimberlite field
          • Daldyn
    		Pavel M. Kartashov data
      • Taymyrskiy Autonomous Okrug
        • Taimyr Peninsula
          • Putoran Plateau
            • Noril'sk
              • Talnakh Cu-Ni Deposit
    		Handbook of Mineralogy
    South Africa
     
    • Limpopo Province
      • Phalaborwa
        • Loolekop
    		Minerals of South Africa
    USA
     
    • Iowa
      • Sioux Co.
    		American Mineralogist: 52: 1261-1271.
    Uzbekistan
     
    • Tashkent (Toshkent) Viloyati
    		Handbook of Mineralogy
    Mineral and/or Locality
    Search Google
     
    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
    Current server date and time: 16th Dec 2011 13:55:17
    Mineral and Locality Search
    Mineral:
    and/or Locality:
    Options
    Fade toolbar when not in focusFix toolbar to bottom of page
    Hide Social Media Links
    Slideshow frame delay seconds