General Redledgeite Information
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Chemical Formula: |
BaTi6Cr+++2O16·(H2O) |
Composition: |
Molecular Weight = 802.60 gm |
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Barium 17.11 % Ba 19.10 % BaO |
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Titanium 35.79 % Ti 59.71 % TiO2 |
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Chromium 12.96 % Cr 18.94 % Cr2O3 |
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Hydrogen 0.25 % H 2.24 % H2O |
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Oxygen 33.89 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
Empirical Formula: |
BaTi6Cr2O16·(H2O) |
IMA Status: |
Approved IMA 1961 |
Locality: |
Red Ledge mine, south of Washington, Nevada Co., California. Link to MinDat.org Location Data. |
Name Origin: |
Named after it's locality. |
Synonym: |
ICSD 62114 |
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PDF 39-352 |
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Redledgeite Image |
Images:
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Redledgeite Crystallography
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Axial Ratios: |
a:c = 1:0.41152 |
Cell Dimensions: |
a = 14.32, c = 5.893, Z = 4; V = 1,208.43 Den(Calc)= 4.41 |
Crystal System: |
Tetragonal - DipyramidalH-M Symbol (4/m) Space Group: I 41/a |
X Ray Diffraction: |
By Intensity(I/Io): 3.19(1), 2.22(0.9), 2.46(0.9), |
Crystal Structure:
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Foley J A , Hughes J M , Drexler J W , The Canadian Mineralogist , 35 (1997) p.1531-1534, Redledgeite, Bax([Cr,Fe,V]2xTi8-2x)O16, the I4/m structure and elucidation, of the sequence of tunnel Ba cations
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Physical Properties of Redledgeite
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Cleavage: |
[???] Good |
Color: |
Yellow green, Black. |
Density: |
3.72 |
Diaphaniety: |
Opaque |
Hardness: |
6-7 - Orthoclase-Quartz |
Luster: |
Adamantine |
Streak: |
gray white |
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Optical Properties of Redledgeite
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Optical Data: |
NCalc= 2.42 - from Gladstone-Dale relationship (KC = 0.3217) where Ncalc=Dcalc*KC+1
NCalc= 2.2 - from Gladstone-Dale relationship (KC = 0.3217) where Ncalc=Dmeas*KC+1 |
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Calculated Properties of Redledgeite
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Electron Density: |
relectron=4.11 gm/cc note: rRedledgeite =4.41 gm/cc. |
Fermion Index |
Fermion Index = 0.08924 Boson Index = 0.91076 |
Photoelectric: |
PERedledgeite = 82.73 barns/electron U=PERedledgeite x relectron= 340.00 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Redledgeite is Not Radioactive |
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Redledgeite Classification
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Dana Class: |
7.9.5.2 (7)Multiple Oxides |
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(7.9)where A B (O)2 |
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(7.9.5)Dana Group |
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7.9.5.1 Mannardite BaTi6V2O16·(H2O) I 41/a 4/m |
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7.9.5.2 Redledgeite BaTi6Cr2O16·(H2O) I 41/a 4/m |
Strunz Class: |
IV/D.08-50 IV - Oxides |
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IV/D - Oxides with metal : oxygen = 1:2 (MO2 and related compounds) |
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IV/D.08 - Cryptomelane group |
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IV/D.08-10 Manjiroite (Na,K)(Mn,Mn)8O16·n(H2O) I 4/m 4/m |
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IV/D.08-20 Cryptomelane K(Mn,Mn)8O16 I2/m 2/m |
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IV/D.08-25 Strontiomelane! SrMn6Mn2O16 P 21/m 2/m |
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IV/D.08-30 Priderite (K,Ba)(Ti,Fe)8O16 I 4/m 4/m |
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IV/D.08-33 Henrymeyerite! BaFeTi7O16 I 4/m 4/m |
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IV/D.08-35 Ankangite Ba(Ti,V,Cr)8O16 I 4/m 4/m |
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IV/D.08-40 Mannardite BaTi6V2O16·(H2O) I 41/a 4/m |
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IV/D.08-50 Redledgeite BaTi6Cr2O16·(H2O) I 41/a 4/m |
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IV/D.08-60 Hollandite Ba(Mn,Mn)8O16 I2/m 2/m |
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IV/D.08-70 Coronadite Pb(Mn,Mn)8O16 I2/m 2/m |
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IV/D.08-80 Cesarolite PbH2Mn3O8 HEX-R Trig |
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Other Redledgeite Information
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References: |
NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) |
See Also: |
Links to other databases for Redledgeite :
1 -Am. Min. Crystal Structure Database
2 -Athena
3 - EUROmin Project
4 -Google Images
5 -Google Scholar
6 -Handbook of Mineralogy (UofA)
7 -MinDAT
8 -MinMax(Deutsch)
9 -MinMax(English)
10 -Mineralienatlas (Deutsch)
11 -QUT Mineral Atlas
12 - WWW-MINCRYST
13 -École des Mines de Paris
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Print or Cut-and-Paste your Redledgeite Specimen Label here :
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Redledgeite
BaTi6Cr+++2O16·(H2O)
Dana No: 7.9.5.2 Strunz No: IV/D.08-50
Locality:
Notes:
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