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About CredneriteHide

Bright gray to iron black
Specific Gravity:
4.98 - 5.34
Crystal System:
After Karl Friedrich Heinrich Credner (13 March 1809 – 28 September 1876), German mining geologist and mineralogist who discovered the mineral.
This page provides mineralogical data about Crednerite.

Classification of CredneriteHide

Approved, 'Grandfathered' (first described prior to 1959)

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
A : Metal: Oxygen = 2:1 and 1:1
B : M:O = 1:1 (and up to 1:1.25); with small to medium-sized cations only

1 : ABX2

7 : Oxides and Hydroxides
3 : Oxides of Cu

Physical Properties of CredneriteHide

Bright gray to iron black
VHN100=231 - 297 kg/mm2 - Vickers
In the plane of the plate; along the striae and inclined about 76° to the plate - less perfect.
perfect {001}; also {100}, perfect, {111}, prominent, {111} and {212}, poor.
4.98 - 5.34 g/cm3 (Measured)    5.46 g/cm3 (Calculated)

Optical Data of CredneriteHide

Strong; pale yellow to brownish gray
Colour in reflected light:
cream white

Chemical Properties of CredneriteHide


Crystallography of CredneriteHide

Crystal System:
Class (H-M):
2/m - Prismatic
Space Group:
C1 2/m 1
Cell Parameters:
a = 5.58 Å, b = 2.87 Å, c = 5.87 Å
β = 104°
a:b:c = 1.944 : 1 : 2.045
Unit Cell V:
91.21 ų (Calculated from Unit Cell)
Occurs in thin six-sided plates; radiating, hemispherical or spherulitic aggregates. Earthy coatings.
Three-fold set of striae intersecting on the plate at about 60° may represent twin lamellae. Polysynthetic twinning noted in polished sections at times.
on synthetic material

X-Ray Powder DiffractionHide

Powder Diffraction Data:
2.85 Å(6)
2.71 Å(10)
2.43 Å(10)
2.24 Å(5b)
1.764 Å(3)
1.613 Å(4)
1.560 Å(4)

Geological EnvironmentHide

Geological Setting:
low-temperature secondary mineral

Type Occurrence of CredneriteHide

Synonyms of CredneriteHide

Other Language Names for CredneriteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
11 photos of Crednerite associated with MendipitePb3Cl2O2
9 photos of Crednerite associated with ChloroxiphitePb3CuO2Cl2(OH)2
8 photos of Crednerite associated with CerussitePbCO3
7 photos of Crednerite associated with MereheaditePb47Cl25(OH)13O24(CO3)(BO3)2
5 photos of Crednerite associated with CalciteCaCO3
1 photo of Crednerite associated with BaryteBaSO4
1 photo of Crednerite associated with MalachiteCu2(CO3)(OH)2
1 photo of Crednerite associated with Manganoan Calcite(Ca,Mn)CO3
1 photo of Crednerite associated with DiaboleitePb2CuCl2(OH)4
1 photo of Crednerite associated with QuartzSiO2

Related Minerals - Nickel-Strunz GroupingHide

4.AB.Carbon Monoxide IceCO
4.AB.10TenoriteCuOMon. 2/m : B2/b
4.AB.15DelafossiteCuFeO2Trig. 3m (3 2/m)
4.AB.20BromelliteBeOHex. 6mm : P63mc
4.AB.20ZinciteZnOHex. 6mm : P63mc
4.AB.25BunseniteNiOIso. m3m (4/m 3 2/m) : Fm3m
4.AB.25LimeCaOIso. m3m (4/m 3 2/m)
4.AB.25ManganositeMnOIso. m3m (4/m 3 2/m) : Fm3m
4.AB.25MonteponiteCdOIso. m3m (4/m 3 2/m) : Fm3m
4.AB.25PericlaseMgOIso. m3m (4/m 3 2/m) : Fm3m
4.AB.25WüstiteFeOIso. m3m (4/m 3 2/m) : Fm3m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

7.3.1CupriteCu2OIso. m3m (4/m 3 2/m) : Pn3m
7.3.2TenoriteCuOMon. 2/m : B2/b
7.3.3ParamelaconiteCu1+2Cu2+2O3Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
7.3.6DelafossiteCuFeO2Trig. 3m (3 2/m)

Fluorescence of CredneriteHide

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for CredneriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Credner (1847) Jb. Min.: 5 (as Kupferhaltige Manganerz).
Hausmann (1847) 1582 (as Mangankupferoxyd).
Rammelsberg C (1849) Ueber das mangankupfererz von Friedrichsrode, Zusatz zu der vorhergehenden abhandlung. Annalen der Physik und Chemie 74, 559-562.
Spencer and Mountain (1923) Mineralogical Magazine: 20: 87.
Wherry E T (1924) Redefinition of species. American Mineralogist 9, 97-98.
Orcel and Pavlovitch (1932) Bull. soc. min.: 54: 108.
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: 722-723.
Töpfer, J., Trari, M., Gravereau, P., Chaminade, J.P., and Coumerc, J.P. (1995) Crystal growth and reinvestigation of the crystal structure of crednerite, CuMnO2. Zeitschrift für Kristallographie: 210: 184-187.

Internet Links for CredneriteHide

Localities for CredneriteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • North Rhine-Westphalia
    • Arnsberg
      • Siegen-Wittgenstein
        • Hilchenbach
          • Müsen
Der Aufschluss 2000(2), 71-123
    • Cologne
      • Rheinisch-Bergischer Kreis
        • Engelskirchen
          • Loope
Habel, B. & Linder, R. (2009): Die Grube "Castor" bei Loope und ihre Mineralien. Mineralien-Welt 20 (3), 10-23
    • Niederberg area
      • Wülfrath
        • Rohdenhaus
Heckman H, Brandstätter F, Der Kalksteinbruch Rohdenhaus bei Wülfrath und seine Mineralien. Mineralien Welt 6/2005
  • Thuringia
    • Gotha
      • Friedrichroda
        • Gottlob Hill
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 817; Mineralogical Journal 17 (1994), 21; Clark, 1993 - "Hey's Mineral Index".
  • Liguria
    • Genoa
      • Ne
[MinRec 32:356]
        • Reppia
          • Monte Copello
Palenzona A. (1987) - La Crednerite di Gambatesa (Val Graveglia) - Rivista Min. Italiana, Milano, fasc. 2, pp. 80-81
    • La Spezia Province
      • Rocchetta di Vara
EDX probed by AMI-SIUK. March/08/2013
  • Lombardy
    • Sondrio Province
      • Torre di Santa Maria
AA. VV., 1996. Collezionare minerali. Hobby & Work.
      • Val Masino
AA. VV., 1996. Collezionare minerali. Hobby & Work.
  • Ehime Prefecture
    • Nishiuwa District
      • Ikata (Sadamisaki Peninsula)
  • Fukushima Prefecture
    • Iwaki City
Matsubara, S., Kato, A., Hashimoto, E., Sekiuchi, K. (1994) Crednerite from the Gozaisho mine, Iwaki City, Fukushima Prefecture, Japan. Mineralogical Journal 17, 21-27; Matsubara, S., Kato, A., Shimizu, M., Sekiuchi, K., and Suzuki, M. (1996) Romeite from the Gozaisho mine, Iwaki, Japan. Mineralogical Journal 18, 155-160; Matsubara, S., Miyawaki, R., Kato, A., Matsuyama, F., Mouri, T. and Suzuki, Y. (2001) Arseniopleite from the Gozaisho mine, Fukushima Prefecture, Japan. Bull. Natn. Sci. Mus., Tokyo, Ser. C, 27, 51-62;
  • Baja California Sur
    • Mulegé Municipality
      • Santa Rosalía
[MinRec 29:43]; Copper Handbook 1911
  • Béni Mellal-Khénifra Region
    • Azilal Province
Gaudefroy, C., Dietrich, J., Permingeat, F., and Picot, P. (1966): Bull. Soc. Franc Mineral. 89, 80-88
  • Drâa-Tafilalet Region
    • Zagora Province
FAVREAU G. & DIETRICH J.E. (2006) Tachgagalt (Maroc), Le Cahier des Micromonteurs, 93, 37-71. (in French)
  • Otjozondjupa Region
    • Grootfontein
      • Kombat
Dunn, P.J. (1991), Rare minerals of the Kombat Mine, Mineralogical Record: 22(6): 421-425. American Mineralogist, Volume 73, pages 888-893, 1988
  • Suceava
    • Suceava district
      • Iacobeni (Jakobeny; Jacobeny; Jakabfalva)
  • Central Serbia
    • Bor District
      • Bor
Pačevski, A., Cvetković, V., Šarić, K.,Banješević, M., Hoefer, H.E., Kremenović, A. (2016): Manganese mineralization in andesites of Brestovačka Banja, Serbia: evidence of sea-floor exhalations in the Timok Magmatic Complex. Mineralogy and Petrology: 110: 491-502; http://forum.amiminerals.it/viewtopic.php?f=5&t=12922&sid=9b89d03bd5ce87f39ba8564967753056 (2016)
  • Catalonia
    • Girona (Gerona)
      • Ripollès
        • Camprodon
          • Rocabruna
Joan Rosell
  • Värmland County
    • Filipstad
Nysten, P., Holtstam, D. and Jonsson, E. (1999) The Långban minerals. In Långban - The mines,their minerals, geology and explorers (D. Holtstam and J. Langhof, eds.), Swedish Museum of Natural History and Raster Förlag, Stockholm & Chr. Weise Verlag, Munich, pp. 89-183.
      • Nordmark District
        • Jakobsberg ore field
GFF 113, 159
  • Valais
    • Leuk
      • Turtmann-Unterems
        • Turtmann Valley
          • Pipjitälli
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): Mineralienlexikon der Schweiz. Wepf (Basel), p. 124.; Ansermet, S. (2012): Mines et minéraux du Valais - II. Anniviers et Tourtemagne. With contributions by N. Meisser, Ed. Porte-plumes (Ayer)
  • England
    • Bristol
      • Westbury on Trym
BMS Database
    • Somerset
      • Mendip
        • Cranmore
Turner, R.W. (2005) A note on Crednerite from Merehead Quarry. Russell Soc Newsletter, No. 47, September 2005; Turner, R.W., (2006) A Mechanism for the formation of the Mineralised Mn Deposits at Merehead Quarry, Cranmore, Somerset, England. Mineralogical Magazine vol. 70, no. 6, pp 629 - 653; Turner, R.W. and Rumsey, M.S. (2010): Mineral Relationships in the Mendip Hills. Journal of the Russell Society, vol 13, pp 3-46.
        • Nunney
BMS Database
        • Priddy
[Clark, 1993 - "Hey's Mineral Index"] [MinRec 27:253]
  • Arizona
    • Cochise County
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 192; Graeme, R. (1993), Bisbee revisited, Min.Rec.: 24: 421-436.
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 192; Graeme, R. (1993), Bisbee revisited, Min.Rec.: 24: 421-436
      • Turquoise Mining District (Courtland-Gleeson Mining District)
R.O. Meyer collection
  • California
    • Napa Co.
      • Calistoga Mining District (Silverado Mining District)
Dana 7:722
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 162.
  • Michigan
    • Ontonagon Co.
      • Mass City
Mineralogy of Michigan (2004) Heinrich & Robinson
  • New Mexico
    • Grant Co.
Minerals of New Mexico 3rd ed.
        • Deadman Canyon-California Gulch-Whitewater Canyon Area
NMBMMR Bull 83 Mineral Deposits of Western Grant County, New Mexico
        • Tyrone Area
NMBMMR Bull 83 Mineral Deposits of Western Grant County, New Mexico
    • Santa Fe Co.
      • La Bajada District
Northrop, Minerals of New Mexico, 3rd rev. ed., 1996
  • Pennsylvania
    • Lebanon Co.
      • Cornwall Borough (Cornwall)
Lapham & Geyer, 1965. Mineral Collecting in Pennsylvania
  • Texas
    • Hudspeth Co.
      • Quitman Mountains
R&M 66:3 pp 196-224
  • Utah
UGMS Bull 117 Minerals and Mineral Localities of Utah
  • Washington
    • Clallam Co.
      • Lake Crescent
Cannon, B. (1975): Minerals of Washington, p.79
Mineral and/or Locality  
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