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Coronadite

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Francisco Vázquez de Coronado
Formula:
Pb(Mn64+Mn23+)O16
System:
Monoclinic
Colour:
Dark grey, black
Hardness:
4½ - 5
Name:
After Francisco Vasquez de Coronado (ca. 1500-1554), a famous Spanish explorer of the American southwest.
Chemically related to (the Pb-richer) cesàrolite.

Classification of Coronadite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
4.DK.05a

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
7.9.1.4

7 : MULTIPLE OXIDES
9 : AB8X16
7.11.28

7 : Oxides and Hydroxides
11 : Oxides of Sn and Pb
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Type Occurrence of Coronadite

Place of Conservation of Type Material:
Smithsonian R2012, 86040
Year of Discovery:
1904

Occurrences of Coronadite

Geological Setting:
In hydrothermal veins or hot springs, as a weathering product in manganese deposits, bedded sedimentary deposits.

Physical Properties of Coronadite

Sub-Metallic, Dull
Diaphaneity (Transparency):
Opaque
Colour:
Dark grey, black
Streak:
Brown-black
Hardness (Mohs):
4½ - 5
Density:
5.246 - 5.505 g/cm3 (Measured)    5.45 g/cm3 (Calculated)

Crystallography of Coronadite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 9.938(1) Å, b = 2.8678(5) Å, c = 9.834(2) Å
β = 90.39(2)°
Ratio:
a:b:c = 3.465 : 1 : 3.429
Unit Cell Volume:
V 280.26 ų (Calculated from Unit Cell)
Z:
1
Morphology:
Massive. Botryoidal crusts with a fibrous structure.
X-Ray Powder Diffraction Data:
d-spacingIntensity
3.466 (60)
3.104 (100)
2.400 (40)
2.205 (40)
2.155 (20)
1.836 (20)
1.542 (50)
Comments:
Very similar to cryptomelane.

Optical Data of Coronadite

Type:
Biaxial
Type:
Anisotropic
Anisotropism:
Strong
Dispersion:
r > v strong
Colour in reflected light:
Nearly galena-white
Pleochroism:
Strong
Comments:
Dark brown to gray

Chemical Properties of Coronadite

Formula:
Pb(Mn64+Mn23+)O16
Essential elements:
All elements listed in formula:
Common Impurities:
Fe,Al,H2O

Relationship of Coronadite to other Species

Other Members of Group:
CryptomelaneK(Mn74+Mn3+)O16
FerrihollanditeBa(Mn64+Fe23+)O16
HollanditeBa(Mn64+Mn23+)O16
ManjiroiteNa(Mn74+Mn3+)O16
StrontiomelaneSr(Mn64+Mn23+)O16
Common Associates:
4.DK.05Akaganeiteβ-Fe3+O(OH,Cl)
4.DK.05aCryptomelaneK(Mn74+Mn3+)O16
4.DK.05aHollanditeBa(Mn64+Mn23+)O16
4.DK.05aManjiroiteNa(Mn74+Mn3+)O16
4.DK.05bMannarditeBa(Ti64+V23+)O16
4.DK.05bPrideriteK(Ti74+Fe3+)O16
4.DK.05bRedledgeiteBa(Ti64+Cr23+)O16
4.DK.05bHenrymeyeriteBa(Ti74+Fe2+)O16
4.DK.05aStrontiomelaneSr(Mn64+Mn23+)O16
4.DK.10Romanèchite(Ba,H2O)2Mn5O10
4.DK.10Todorokite(Ca,K,Na,Mg,Ba,Mn)(Mn,Mg,Al)6O12 · 3H2O
7.11.1RomarchiteSnO
7.11.2CassiteriteSnO2
7.11.4SchoenfliesiteMg[Sn(OH)6]
7.11.5BurtiteCa[Sn(OH)6]
7.11.6VismirnoviteZn[Sn(OH)6]
7.11.7WickmaniteMn2+[Sn(OH)6]
7.11.8TetrawickmaniteMn2+[Sn4+(OH)6]
7.11.9Jeanbandyite(Fe2+,Mn2+)[Sn4+(OH)6]
7.11.10NataniteFe2+[Sn(OH)6]
7.11.11Mushistonite(Cu,Zn,Fe2+)[Sn(OH)6]
7.11.12Ferronigerite-2N1S(Al,Fe,Zn)2(Al,Sn)6O11(OH)
7.11.13Magnesionigerite
7.11.14ArgutiteGeO2
7.11.15BrunogeieriteFe22+Ge4+O4
7.11.16StottiteFe2+[Ge4+(OH)6]
7.11.17CarboiriteFeAl2(GeO4)O(OH)2
7.11.18OtjisumeitePbGe4O9
7.11.19BartelkeitePb(Fe2+Ge)[Ge2O7](OH)2 · H2O
7.11.20MassicotPbO
7.11.21LithargePbO
7.11.22MiniumPb3O4
7.11.23PlattneritePbO2
7.11.24Scrutinyiteα-PbO2
7.11.25MurdochitePbCu6O8-x(Cl,Br)2x where x<=0.5
7.11.26MacedonitePbTiO3
7.11.27CesàrolitePb(Mn4+)3O6(OH)2
7.11.29QuenselitePbMnO2(OH)
7.11.30PlumboferritePb2Fe3+11-xMnx2+O19-2x, x = 1/3
7.11.31Magnetoplumbite(Pb,Mn)(Fe,Mn)12O19
7.11.32SenaitePb(Ti,Fe,Mn)21O38

Other Names for Coronadite

Name in Other Languages:

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.
Industrial Uses:
Manganese ore

References for Coronadite

Reference List:
Lindgren and Hillebrand (1904), American Journal of Science: 1: 448.

Lindgren and Hillebrand (1905), USGS Bulletin 262: 42.

Lindgren and Hillebrand (1907), Zs. Kr.: 43: 380.

Lindgren (1933), American Mineralogist: 18: 548.

Frondel, C. and Heinrich (1942), American Mineralogist: 27: 48.

Palache, Charles, Harry Berman & Clifford Frondel (1944), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Volume I: Elements, Sulfides, Sulfosalts, Oxides. John Wiley and Sons, Inc., New York. 7th edition, revised and enlarged: 742-743.

Hewett, Donnel Foster (1971): Coronadite – modes of occurrence and origin: Economic Geology: 66: 164-177.

American Mineralogist (1989): 74: 913-917.

Internet Links for Coronadite

Specimens:
The following Coronadite specimens are currently listed for sale on minfind.com.

Localities for Coronadite

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.
Mineral and/or Locality  
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