Mineralogy Database

Coronadite Mineral Data

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General Coronadite Information

Help on Chemical  Formula: Chemical Formula: Pb(Mn++++,Mn++)8O16
Help on Composition: Composition: Molecular Weight = 933.55 gm
   Barium      1.47 %  Ba    1.64 % BaO
   Manganese  45.31 %  Mn    3.80 % MnO / 67.05 % MnO2
   Aluminum    0.29 %  Al    0.55 % Al2O3
   Vanadium    1.09 %  V     1.95 % V2O5
   Lead       24.41 %  Pb   26.30 % PbO
   Oxygen     27.42 %  O
             ______        ______ 
             100.00 %      101.29 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb1.1Ba0.1Mn4+7.2Mn2+0.5V5+0.2Al0.1O16
Help on Environment: Environment: Primary mineral in hydrothermal veins or from hot springs, secondary origin in oxidized zones above Mn deposits and bedded sedimentary rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1904
Help on Locality: Locality: Coronado vein, Clifton-Morenci district, Greenlee County, Arizona. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Francisco Vasquez de Coronado (ca 1500-1554), first Spanish explorer of the American southwest.

Coronadite Image

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  Coronadite   Crocoite

Comments: Black coronadite with red crocoite on matrix.
Location: Callenberg North (no. 1) open cut, Callenberg, Glauchau, Saxony, Germany. Scale: Specimen size 7 cm.
© Thomas Witzke / Abraxas-Verlag

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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

Coronadite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =3.4653:1:3.4291
Help on Cell Dimensions: Cell Dimensions: a = 9.938, b = 2.8678, c = 9.834, Z = 1; beta = 90.39° V = 280.26 Den(Calc)= 5.53
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: I2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.104(1), 3.466(0.6), 1.542(0.5),

Physical Properties of Coronadite

Help on Color: Color: Grayish black, Dark gray, Black.
Help on Density: Density: 5.44
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Botryoidal - "Grape-like" rounded forms (e.g.. malachite).
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Hardness: Hardness: 4.5-5 - Near Apatite
Help on Luster: Luster: Sub Metallic
Help on Streak: Streak: brownish black

Optical Properties of Coronadite

Help on Optical Data: Optical Data: Biaxial (?)
  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
Help on Pleochroism (x): Pleochroism (x): strong dark brown.
Help on Pleochroism (y): Pleochroism (y): strong dark brown.
Help on Pleochroism (z): Pleochroism (z): gray.

Calculated Properties of Coronadite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.00 gm/cc
note: Specific Gravity of Coronadite =5.53 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PECoronadite = 433.51 barns/electron
U=PECoronadite x rElectron Density=2,168.35 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Coronadite is Not Radioactive

Coronadite Classification

Help on  Dana Class: Dana Class: (07)Multiple Oxides
  (07.09)Dana Type
  (07.09.01)Cryptomelane Group (Hard black, fine-grained) Hollandite Ba(Mn,Mn)8O16 I2/m 2/m Cryptomelane K(Mn,Mn)8O16 I2/m 2/m Manjiroite (Na,K)(Mn,Mn)8O16•n(H2O) I 4/m 4/m Coronadite Pb(Mn,Mn)8O16 I2/m 2/m Strontiomelane! SrMn6Mn2O16 P 21/m 2/m Henrymeyerite! BaFeTi7O16 I 4/m 4/m
Help on  Strunz Class: Strunz Class: 04.DK.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.D - Metal:Oxygen = 1:2 and similar
  04.DK -With large (� medium-sized) cations; tunnel structures
04.DK.05 Akaganeite Fe(O,OH,Cl) I2/m 2/m
04.DK.05 Ankangite Ba(Ti,V,Cr)8O16 I 4/m 4/m
04.DK.05 Coronadite Pb(Mn,Mn)8O16 I2/m 2/m
04.DK.05 Hollandite Ba(Mn,Mn)8O16 I2/m 2/m
04.DK.05 Manjiroite (Na,K)(Mn,Mn)8O16•n(H2O) I 4/m 4/m
04.DK.05 Mannardite BaTi6V2O16•(H2O) I 41/a 4/m
04.DK.05 Redledgeite BaTi6Cr2O16•(H2O) I 41/a 4/m
04.DK.05 Priderite (K,Ba)(Ti,Fe)8O16 I 4/m 4/m
04.DK.05 Henrymeyerite! BaFeTi7O16 I 4/m 4/m

Other Coronadite Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: 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
16 - YupRocks

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Dana No: Strunz No: 04.DK.05





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