Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (2 online) Mindat Auctions

Nchwaningite

Big Photo

N'Chwaning II Mine, N'Chwaning Mines, Kuruman, Kalahari manganese fields, Northern Cape Province, South Africa
© Knut Eldjarn

Show Nchwaningite Photos (3)
Formula:
Mn
2+
2
[(OH)
 
2
|SiO
 
3
] · H
 
2
O
System:OrthorhombicColour:Light brown
Lustre:VitreousHardness:5½
This page provides mineralogical data about Nchwaningite.

Classification of Nchwaningite

IMA status:Approved
Strunz 8th edition ID:8/F.02-40
Nickel-Strunz 10th (pending) edition ID:9.DB.30

9 : SILICATES (Germanates)
D : Inosilicates
B : Inosilicates with 2-periodic single chains, Si2O6; Pyroxene-related minerals
Dana 8th edition ID:65.1.8.1

65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
1 : Single-Width Unbranched Chains, W=1 with chains P=2
mindat.org URL:http://www.mindat.org/min-2868.html
Please feel free to link to this page.

Type Occurrence of Nchwaningite

Type Locality:N'Chwaning II Mine, N'Chwaning Mines, Kuruman, Kalahari manganese fields, Northern Cape Province, South Africa
Year of Discovery:1995
Geological Setting of type material:vugs in Mn ore

Physical Properties of Nchwaningite

Lustre:Vitreous
Colour:Light brown
Streak:White
Hardness (Mohs):5½

Crystallography of Nchwaningite

Crystal System:Orthorhombic
Cell Parameters:a = 12.67Å, b = 7.21Å, c = 5.34Å
Ratio:a:b:c = 1.757 : 1 : 0.741
Unit Cell Volume:V 487.81 ų (Calculated from Unit Cell)

Optical Data of Nchwaningite

Type:Biaxial (-)
RI values: nα = 1.681 nβ = 1.688 nγ = 1.690
2V:Measured: 54° , Calculated: 56°
Maximum Birefringence:δ = 0.009

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

Chemical Properties of Nchwaningite

Formula:
Mn
2+
2
[(OH)
 
2
|SiO
 
3
] · H
 
2
O
Essential elements:H, Mn, O, Si
All elements listed in formula:H, Mn, O, Si
Common Impurities:Al,Fe,Mg,Ca

Relationship of Nchwaningite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.DB.05Balipholite
BaLiMg
 
2
Al
 
3
[(OH)
 
4
|Si
 
2
O
 
6
]
 
2
9.DB.05Carpholite
Mn
2+
 
Al
 
2
[(OH)
 
4
|Si
 
2
O
 
6
]
9.DB.05Ferrocarpholite
(Fe
2+
 
,Mg)Al
 
2
[(OH)
 
4
|Si
 
2
O
 
6
]
9.DB.05Magnesiocarpholite
(Mg,Fe
2+
 
)Al
 
2
[(OH)
 
4
|Si
 
2
O
 
6
]
9.DB.05Potassiccarpholite
(K,[])(Li,Mn
2+
 
)
 
2
Al
 
4
[(OH)
 
4
 ׀ (F,OH)
 
4
 ׀ (Si
 
2
O
 
6
)
 
2
]
9.DB.05Vanadiocarpholite
Mn
2+
 
V
3+
 
Al[(OH)
 
4
|Si
 
2
O
 
6
]
9.DB.10Lorenzenite
Na
 
2
Ti
 
2
[O
 
3
|Si
 
2
O
 
6
]
9.DB.15Lintisite
LiNa
 
3
Ti
 
2
[O|Si
 
2
O
 
6
]
 
2
 · 2H
 
2
O
9.DB.20Kukisvumite
Na
 
6
ZnTi
 
4
Si
 
8
O
 
28
·4H
 
2
O
9.DB.20Manganokukisvumite
Na
 
6
MnTi
 
4
Si
 
8
O
 
28
·4H
 
2
O
9.DB.25Vinogradovite
(Na,Ca,K)
 
4
Ti
 
4
AlSi
 
6
O
 
23
(OH)·2H
 
2
O
9.DB.25Paravinogradovite
Na
 
1-2
(Ti,Fe
3+
 
)
 
4
[(OH)
 
4
|AlSi
 
3
O
 
10
|(Si
 
2
O
 
6
)
 
2
] · H
 
2
O
9.DB.35Plancheite
Cu
 
8
[(OH)
 
4
|Si
 
8
O
 
22
] · H
 
2
O
9.DB.40Shattuckite
Cu
 
5
[(OH)
 
2
|(SiO
 
3
)
 
4
]
9.DB.40UM2005-31-SiO:CuH
Cu
 
11
(SiO
 
4
)(OH)
 
18
·9H
 
2
O ?
9.DB.45Aerinite
Ca
 
5
(Fe
3+
 
,Al,Fe
2+
 
,Mg)(Al,Mg)
 
6
[HSi
 
12
O
 
36
(OH)
 
12
][(CO
 
3
)
 
1.2
(H
 
2
O)
 
12
]

Other Names for Nchwaningite

Synonyms:
IMA1994-002
Other Languages:
German:Nchwaningit
Russian:Нчванингит
Spanish:Nchwaningita

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 Nchwaningite

Reference List:Mineralogical Record: 27: 203-204.

American Mineralogist (1995): 80: 377-386.

Internet Links for Nchwaningite

Search Engines:
  • Look for Nchwaningite on Google
  • Look for Nchwaningite images on Google
    • External Links:
  • Look for Nchwaningite on Webmineral
  • Look for Nchwaningite on Athena Mineralogy
  • Look for Nchwaningite on Wikipedia
  • Look for Nchwaningite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Nchwaningite in the Natural History Museum (London) online catalogue
    • Mineral Dealers:
  • Buy Fine Minerals from mineralsweb.com
  • The Arkenstone - Fine Minerals
  • SpiriferMinerals.com - high quality specimens
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • High-end worldwide specimens & outstanding customer service
  • Find Nchwaningite on www.crystalclassics.co.uk
  • Wilensky Fine Minerals
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Edwards Minerals - Fine Specimens
  • Lapis Mineral Magazin
  • rare and unusual minerals mainly crystallized
  • Search for - Nchwaningite - on e-Rocks Mineral Sales & Auctions
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to sponsor this page.

    Localities for Nchwaningite

    Hide Locality List
    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.
    (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.
    South Africa
     
    • Northern Cape Province
      • Kalahari manganese fields
        • Hotazel
    		No reference listed
        • Kuruman
          • N'Chwaning Mines
    		[Amer.Min.(1995) 80, 377-386; MinRec 27:203-204]
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon Ralph and Ida Chau 1993-2009. 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. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 12th Nov 2009 03:41:05