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Coronadite Mineral Data
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General Coronadite Information
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 Chemical Formula: |
Pb(Mn++++,Mn++)8O16 |
| Composition: |
Molecular Weight = 933.55 gm |
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Barium 1.47 % Ba 1.64 % BaO |
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Manganese 45.31 % Mn 3.80 % MnO / 67.05 % MnO2 |
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Aluminum 0.29 % Al 0.55 % Al2O3 |
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Vanadium 1.09 % V 1.95 % V2O5 |
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Lead 24.41 % Pb 26.30 % PbO |
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Oxygen 27.42 % O |
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______ ______ |
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100.00 % 101.29 % = TOTAL OXIDE |
| Empirical Formula: |
Pb1.1Ba0.1Mn4+7.2Mn2+0.5V5+0.2Al0.1O16 |
| Environment: |
Primary mineral in hydrothermal veins or from hot springs, secondary origin in oxidized zones above Mn deposits and bedded sedimentary rocks. |
| IMA Status: |
Valid Species (Pre-IMA) 1904 |
| Locality: |
Coronado vein, Clifton-Morenci district, Greenlee County, Arizona. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Francisco Vasquez de Coronado (ca 1500-1554), first Spanish explorer of the American southwest. |
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Coronadite Image |
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Images:
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Images:
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Coronadite Iodargyrite
Comments: Dark, fine-grained massive coronadite with yellowish octahedral iodargyrite crystals.
Location: Broken Hill, New South Wales, Australia.
Scale: Picture size 3x2 cm.
© Dave Barthelmy |
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Coronadite Crystallography
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| Axial Ratios: |
a:b:c =3.4653:1:3.4291 |
| Cell Dimensions: |
a = 9.938, b = 2.8678, c = 9.834, Z = 1; beta = 90.39° V = 280.26 Den(Calc)= 5.53 |
| Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: I2/m |
| X Ray Diffraction: |
By Intensity(I/Io): 3.104(1), 3.466(0.6), 1.542(0.5), |
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Physical Properties of Coronadite
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| Color: |
Grayish black, Dark gray, Black. |
| Density: |
5.44 |
| Diaphaneity: |
Opaque |
| Habit: |
Botryoidal - "Grape-like" rounded forms (e.g.. malachite). |
| Habit: |
Fibrous - Crystals made up of fibers. |
| Hardness: |
4.5-5 - Near Apatite |
| Luster: |
Sub Metallic |
| Streak: |
brownish black |
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Optical Properties of Coronadite
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| Optical Data: |
Biaxial (?) |
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NCalc= 2.75 - from Gladstone-Dale relationship (KC = 0.3165) where Ncalc=Dcalc*KC+1
NCalc= 2.72 - from Gladstone-Dale relationship (KC = 0.3165) where Ncalc=Dmeas*KC+1
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| Pleochroism (x): |
strong dark brown. |
| Pleochroism (y): |
strong dark brown. |
| Pleochroism (z): |
gray. |
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Calculated Properties of Coronadite
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| Electron Density: |
Bulk Density (Electron Density)=5.00 gm/cc
note: Specific Gravity of Coronadite =5.53 gm/cc.
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| Fermion Index: |
Fermion Index = 0.05
Boson Index = 0.95 |
| Photoelectric: |
PECoronadite = 433.51 barns/electron
U=PECoronadite x rElectron Density=2,168.35 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Coronadite is Not Radioactive |
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Coronadite Classification
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| Dana Class: |
07.09.01.04 (07)Multiple Oxides |
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(07.09)Dana Type |
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(07.09.01)Cryptomelane Group (Hard black, fine-grained) |
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07.09.01.01 Hollandite Ba(Mn,Mn)8O16 I2/m 2/m |
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07.09.01.02 Cryptomelane K(Mn,Mn)8O16 I2/m 2/m |
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07.09.01.03 Manjiroite (Na,K)(Mn,Mn)8O16•n(H2O) I 4/m 4/m |
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07.09.01.04 Coronadite Pb(Mn,Mn)8O16 I2/m 2/m |
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07.09.01.05 Strontiomelane! SrMn6Mn2O16 P 21/m 2/m |
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07.09.01.06 Henrymeyerite! BaFeTi7O16 I 4/m 4/m |
| Strunz Class: |
04.DK.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.D - Metal:Oxygen = 1:2 and similar |
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04.DK -With large (� medium-sized) cations; tunnel structures |
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04.DK.05 Akaganeite Fe(O,OH,Cl) I2/m 2/m |
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04.DK.05 Ankangite Ba(Ti,V,Cr)8O16 I 4/m 4/m |
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04.DK.05 Coronadite Pb(Mn,Mn)8O16 I2/m 2/m |
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04.DK.05 Hollandite Ba(Mn,Mn)8O16 I2/m 2/m |
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04.DK.05 Manjiroite (Na,K)(Mn,Mn)8O16•n(H2O) I 4/m 4/m |
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04.DK.05 Mannardite BaTi6V2O16•(H2O) I 41/a 4/m |
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04.DK.05 Redledgeite BaTi6Cr2O16•(H2O) I 41/a 4/m |
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04.DK.05 Priderite (K,Ba)(Ti,Fe)8O16 I 4/m 4/m |
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04.DK.05 Henrymeyerite! BaFeTi7O16 I 4/m 4/m |
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Other Coronadite Information
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| References: |
NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3) |
| See Also: |
Links to other databases for Coronadite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST
16 - YupRocks
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Coronadite
Pb(Mn++++,Mn++)8O16
Dana No: 07.09.01.04 Strunz No: 04.DK.05
Locality:
Notes:
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