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Redledgeite

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Formula:
Ba(Ti
4+
6
Cr
3+
2
)O
 
16
Formerly defined as Bax([Cr,Fe,V]3+2xTi8-2x)O16.
System:TetragonalColour:Green, yellow, black
Hardness:6 - 7
Member of:Priderite Group > Hollandite Supergroup
Name:Named after its discovery locality.

Classification of Redledgeite

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

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(Ti
4+
6
Cr
3+
2
)O
 
16


Formerly defined as Bax([Cr,Fe,V]3+2xTi8-2x)O16.
Simplified for copy/paste:Ba(Ti4+6Cr3+2)O16
Essential elements:Ba, Cr, O, Ti
All elements listed in formula:Ba, Cr, O, Ti

Relationship of Redledgeite to other Species

Member of:Priderite Group > Hollandite Supergroup
Other Members of Group:

- +
Henrymeyerite
Ba(Ti
4+
7
Fe
2+
 
)O
 
16
Mannardite
Ba(Ti
4+
6
V
3+
2
)O
 
16
Priderite
K(Ti
4+
7
Fe
3+
 
)O
 
16
Related Minerals - Nickel-Strunz Grouping):

- +
4.DK.05Akaganeite
β-Fe
3+
 
O(OH,Cl)
4.DK.05aCoronadite
Pb(Mn
4+
6
Mn
3+
2
)O
 
16
4.DK.05aCryptomelane
K(Mn
4+
7
Mn
3+
 
)O
 
16
4.DK.05aHollandite
Ba(Mn
4+
6
Mn
3+
2
)O
 
16
4.DK.05aManjiroite
Na(Mn
4+
7
Mn
3+
 
)O
 
16
4.DK.05bMannardite
Ba(Ti
4+
6
V
3+
2
)O
 
16
4.DK.05bPriderite
K(Ti
4+
7
Fe
3+
 
)O
 
16
4.DK.05bHenrymeyerite
Ba(Ti
4+
7
Fe
2+
 
)O
 
16
4.DK.05aStrontiomelane
Sr(Mn
4+
6
Mn
3+
2
)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
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, Ba, Sr)(Zr, Fe)(Mg,Fe)
 
2
(Ti,Cr,Fe)
 
18
O
 
38
7.14.7Mcconnellite
CuCrO
 
2
7.14.9Hawthorneite
Ba(MgTi
 
3
Cr
 
4
Fe
 
4
)O
 
19
7.14.10Zincochromite
ZnCr
 
2
O
 
4
7.14.11Wattersite
(Hg
+
2
)
 
2
Hg
2+
 
(CrO
 
4
)O
 
2
7.14.12Chromite
Fe
2+
 
Cr
3+
2
O
 
4
7.14.13Magnesiochromite
Mg(Cr,Al,Fe)
 
2
O
 
4

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.

Internet Links for Redledgeite

Search Engines:
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  • External Links:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Redledgeite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
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  • Localities for Redledgeite

    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.
    Italy
     
    • Lombardy
      • Sondrio Province
        • Valtellina
    Lapis, 19 (10), 15-21+86.
            • Lanterna Valley
              • Lanzada
                • Mt. Motta
    Bedognè, F. (2011). Microminerali della Valmalenco. Nuove segnalazioni e aggiornamenti. Rivista Mineralogica Italiana, 1/2011, 40-45
    Russia
     
    • Urals Region
      • Middle Urals
        • Permskaya Oblast'
          • Gornozavodskii area
    P.M. Kartashov data
    USA
     
    • California
      • Nevada Co.
        • Washington District (Omega District)
          • Washington
    Gordon, Samuel G. & E.V. Shannon (1928), Chromrutile a new mineral from California: American Mineralogist: 13: 69; Bradley, W.W. (1940), Thirty-sixth report of the State Mineralogist: California Division Mines Report 36: 69; Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Seventh edition, Volume I, John Wiley & Sons, New York: 560; Strunz, Hugo (1961), “Chromrutil” von der Red Ledge mine ist kein rutil. Redledgeite: Neues Jahrb. Mineral., Monatsh.: 107; Strunz, Hugo (1963), Redledgeite, eine TiO2-einlagerungestruktur analog kryptomelan: Neues. Jahrb. Min. mh. 5: 116; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 174.
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    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. 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 thousands 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.
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