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Redledgeite

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Red Ledge Mine, Washington, Washington District (Omega District), Nevada Co., California, USA
© Knut Eldjarn

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Formula:
Ba
 
x
([Cr,Fe,V]
3+
2x
Ti
 
8-2x
)O
 
16
System:TetragonalColour:Green, yellow, black
Hardness:6 - 7
Name:Named after its discovery locality.


Cryptomelane Group.

Classification of Redledgeite

IMA status:Approved
Strunz 8th edition ID:4/D.08-50
Nickel-Strunz 10th (pending) edition ID:4.DK.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
K : With large (+- medium-sized) cations; tunnel structures
Dana 8th edition ID:7.9.5.2

7 : MULTIPLE OXIDES
9 : AB8X16
Hey's CIM Ref.:7.14.8

7 : Oxides and Hydroxides
14 : Oxides of Cr
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Type Occurrence of Redledgeite

Type Locality:Red Ledge Mine, Washington, Washington District (Omega District), Nevada Co., California, USA
Year of Discovery:1961

Physical Properties of Redledgeite

Lustre:Adamantine
Colour:Green, yellow, black
Streak:White, grey
Hardness (Mohs):6 - 7

Crystallography of Redledgeite

Crystal System:Tetragonal
Cell Parameters:a = 20.33Å, c = 5.88Å
Ratio:a:c = 1 : 0.289
Unit Cell Volume:V 2,430.26 ų (Calculated from Unit Cell)

Chemical Properties of Redledgeite

Formula:
Ba
 
x
([Cr,Fe,V]
3+
2x
Ti
 
8-2x
)O
 
16
Essential elements:Ba, Cr, O
All elements listed in formula:Ba, Cr, Fe, O, Ti, V

Relationship of Redledgeite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.DK.05Akaganeite
β-Fe
3+
 
O(OH,Cl)
4.DK.05Ankangite
Ba(Ti,V
3+
 
,Cr)
 
8
O
 
16
4.DK.05Coronadite
Pb(Mn
4+
 
,Mn
3+
 
)
 
8
O
 
16
4.DK.05Hollandite
Ba(Mn
4+
 
,Mn
2+
 
)
 
8
O
 
16
4.DK.05Manjiroite
(Na,K)Mn
 
8
O
 
16
·nH
 
2
O
4.DK.05Mannardite
Ba
 
x
Ti
 
8-2x
V
 
2x
O
 
16
·2-xH
 
2
O
4.DK.05Priderite
(K,Ba)(Ti,Fe)
 
8
O
 
16
4.DK.05Henrymeyerite
BaFe
2+
 
Ti
 
7
O
 
16
4.DK.10Cryptomelane
K(Mn
4+
 
,Mn
2+
 
)
 
8
O
 
16
4.DK.10Romanèchite
(Ba,H
 
2
O)
 
2
Mn
 
5
O
 
10
4.DK.10Todorokite
(Ca,K,Na,Mg,Ba,Mn)(Mn,Mg,Al)
 
6
O
 
12
·3H
 
2
O
4.DK.10Strontiomelane
SrMn
4+
6
Mn
3+
2
O
 
16
Related Minerals - Hey's Index Grouping:

- +
7.14.1Eskolaite
Cr
 
2
O
 
3
7.14.2Bracewellite
CrO(OH)
7.14.3Grimaldiite
CrO(OH)
7.14.4Guyanaite
CrO(OH)
7.14.5Yimengite
K(Cr,Ti,Fe,Mg)
 
12
O
 
19
7.14.6Mathiasite
K(Ti,Cr,Fe,Mg,Zr)
 
21
O
 
38
7.14.7Mcconnellite
CuCrO
 
2
7.14.9Hawthorneite
BaMgTi
 
3
Cr
 
4
Fe
 
4
O
 
19
7.14.10Zincochromite
ZnCr
 
2
O
 
4
7.14.11Wattersite
(Hg-Hg)
2+
2
Hg
2+
 
[O
 
2
|CrO
 
4
]
7.14.12Chromite
FeCr
 
2
O
 
4
7.14.13Magnesiochromite
MgCr
 
2
O
 
4
7.14.14 Donathite

Other Names for Redledgeite

Synonyms:
Chromrutile
Other Languages:
German:Chromrutil
Redledgeit
Russian:Редледжеит
Spanish:Redledgeita

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 Redledgeite

Reference List:Gordon, Samuel G. & E.V. Shannon (1928), Chromrutile a new mineral from California: American Mineralogist: 13: 69.

Strunz, Hugo (1961), “Chromrutil” von der Red Ledge mine ist kein rutil. Redledgeite: Neues Jahrb. Mineral., Monatsh.: 107-111.

American Mineralogist (1961): 46: 1201.

Strunz, Hugo (1963), Redledgeite, eine TiO2-einlagerungestruktur analog kryptomelan: Neues. Jahrb. Mineral. Monatsh. 5: 116-119.

Canadian Mineralogist (1986): 24: 55-66.

American Mineralogist (1988): 73: 198.

Canadian Mineralogist (1997): 35: 1531-1534.

Mineralogical Magazine: 5: 709-715.

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    Localities for Redledgeite

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