Redledgeite
A valid IMA mineral species
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About Redledgeite
East side, Butterfly Adit
Red Ledge Mine, Washington, Washington Mining District, Nevada County, California, USA
Red Ledge Mine, Washington, Washington Mining District, Nevada County, California, USA
Formula:
Ba(Ti4+6Cr3+2)O16
Formerly defined as Bax([Cr,Fe,V]3+2xTi8-2x)O16.
Colour:
Green, yellow, black
Lustre:
Adamantine
Hardness:
6 - 7
Specific Gravity:
3.72
Crystal System:
Tetragonal
Member of:
Name:
Named after its discovery locality.
Unique Identifiers
Mindat ID:
3380
Long-form identifier:
mindat:1:1:3380:6
GUID
(UUID V4):
(UUID V4):
c56ee21a-0458-49c2-b212-45aa7c4d85bb
IMA Classification of Redledgeite
Approved
IMA Formula:
Ba(Ti6Cr3+2)O16
Classification of Redledgeite
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
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
7.9.5.2
7 : MULTIPLE OXIDES
9 : AB8X16
7 : MULTIPLE OXIDES
9 : AB8X16
7.14.8
7 : Oxides and Hydroxides
14 : Oxides of Cr
7 : Oxides and Hydroxides
14 : Oxides of Cr
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Red | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Redledgeite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Redledgeite
Adamantine
Transparency:
Opaque
Colour:
Green, yellow, black
Streak:
White, grey
Hardness:
6 - 7 on Mohs scale
Density:
3.72 g/cm3 (Measured) 4.413 g/cm3 (Calculated)
Chemistry of Redledgeite
Mindat Formula:
Ba(Ti4+6Cr3+2)O16
Formerly defined as Bax([Cr,Fe,V]3+2xTi8-2x)O16.
Formerly defined as Bax([Cr,Fe,V]3+2xTi8-2x)O16.
Elements listed:
Crystallography of Redledgeite
Crystal System:
Tetragonal
Cell Parameters:
a = 20.33 Å, c = 5.88 Å
Ratio:
a:c = 1 : 0.289
Unit Cell V:
2,430.26 ų (Calculated from Unit Cell)
Comment:
Tetragonal, or monoclinic, pseudotetragonal. Point Group: 4/m or 2/m.; : Space Group: I41/m, : I2/m, ; Space Group: I41/m, with a = 14.320(2) c = 5.893(1) Z = 4, or Space Group: I2/m, with a = 10.129(2) b = 2.951(1) c = 10.135(1) β = 90.05◦ Z=1
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0005537 | Redledgeite | Foley J A, Hughes J M, Drexler J W (1997) Redledgeite, Bax([Cr,Fe,V]2xTi8-2x)O16, the I4/m structure and elucidation of the sequence of tunnel Ba cations The Canadian Mineralogist 35 1531-1534 |  | 1997 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.195 Å | (100) |
| 2.470 Å | (60) |
| 1.583 Å | (60) |
| 3.570 Å | (50) |
| 1.885 Å | (50) |
| 1.393 Å | (50) |
| 2.217 Å | (40) |
Comments:
close to mannardite.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 3a: Earth’s earliest Hadean crust | >4.50 |
| 7 : Ultramafic igneous rocks |
Type Occurrence of Redledgeite
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, 95846; The Natural History Museum, London, England, 1928,336.
Associated Minerals at Type Locality:
Reference:
Strunz, H. (1961) “Chromrutil” von der Red Ledge mine ist kein rutil. Redledgeite. Neues Jahrbuch für Mineralogie, Monatshefte: 107-111.
Synonyms of Redledgeite
Other Language Names for Redledgeite
Relationship of Redledgeite to other Species
Member of:
Other Members of this group:
| Henrymeyerite | Ba(Ti4+7Fe2+)O16 | Tet. 4/m : I4/m |
| Mannardite | Ba(Ti4+6V3+2)O16 | Tet. 4/m : I41/a |
| Priderite | K(Ti4+7Fe3+)O16 | Tet. 4/m : I4/m |
| UM1994-09-O:CrKTi | K2Cr2Ti6O16 |
Common Associates
Associated Minerals Based on Photo Data:
| 6 photos of Redledgeite associated with Chromium-bearing Clinochlore | Mg5(Al,Cr)2Si3O10(OH)8 |
| 3 photos of Redledgeite associated with Chromite | Fe2+Cr3+2O4 |
| 2 photos of Redledgeite associated with Clinochlore | Mg5Al(AlSi3O10)(OH)8 |
| 2 photos of Redledgeite associated with Aluminian Chromite | Fe(Cr,Al)2O4 |
| 2 photos of Redledgeite associated with Uvarovite | Ca3Cr2(SiO4)3 |
| 1 photo of Redledgeite associated with Shuiskite-(Mg) | Ca2MgCr3+2[Si2O6OH][SiO4](OH)2(OH) |
| 1 photo of Redledgeite associated with Chromitite |
Related Minerals - Strunz-mindat Grouping
| 4.DK. | Ferrihollandite | Ba(Mn4+6Fe3+2)O16 |
| 4.DK.K | Thalliomelane | Tl(Mn4+7.5Cu2+0.5)O16 |
| 4.DK.4.DK. | Ferricoronadite | Pb(Mn4+6Fe3+2)O16 |
| 4.DK.05 | Akaganeite | (Fe3+,Ni2+)8(OH,O)16Cl1.25 · nH2O |
| 4.DK.05a | Coronadite | Pb(Mn4+6Mn3+2)O16 |
| 4.DK.05a | Cryptomelane | K(Mn4+7Mn3+)O16 |
| 4.DK.05a | Hollandite | Ba(Mn4+6Mn3+2)O16 |
| 4.DK.05a | Manjiroite | Na(Mn4+7Mn3+)O16 |
| 4.DK.05b | Mannardite | Ba(Ti4+6V3+2)O16 |
| 4.DK.05b | Priderite | K(Ti4+7Fe3+)O16 |
| 4.DK.05b | Henrymeyerite | Ba(Ti4+7Fe2+)O16 |
| 4.DK.05a | Strontiomelane | Sr(Mn4+6Mn3+2)O16 |
| 4.DK.10 | Romanèchite | (Ba,H2O)2(Mn4+,Mn3+)5O10 |
| 4.DK.10 | Todorokite | (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Redledgeite
mindat.org URL:
https://www.mindat.org/min-3380.html
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References for Redledgeite
Reference List:
IMA (1967) International Mineralogical Association: Commission on New Minerals and Mineral Names. Mineralogical Magazine and Journal of the Mineralogical Society, 36 (277) 131-136 doi:10.1180/minmag.1967.036.277.20
Scott, J. D., Peatfield, G. R. (1986) Mannardite [Ba·H2O](Ti6V3+2)O16, a new mineral species, and new data on redledgeite. The Canadian Mineralogist, 24 (1) 55-66
Localities for Redledgeite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Italy | |
| Bedognè (2011) |
| Lapis (10) | |
Russia | |
| Alekseev et al. (2003) +1 other reference |
| Pavel.M. Kartashov (n.d.) |
| EDS probe +1 other reference |
| Rezvukhin +3 other references |
USA (TL) | |
| Van Nostrand Reinholt Press: 174. +6 other references |
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Red Ledge Mine, Washington, Washington Mining District, Nevada County, California, USA