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Crednerite

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About CredneriteHide

Formula:
CuMnO2
Colour:
Bright gray to iron black
Lustre:
Metallic
Hardness:
4
Specific Gravity:
4.98 - 5.34
Crystal System:
Monoclinic
Name:
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.AB.05

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
7.1.2.1

7 : MULTIPLE OXIDES
1 : ABX2
7.3.5

7 : Oxides and Hydroxides
3 : Oxides of Cu

Physical Properties of CredneriteHide

Metallic
Transparency:
Opaque
Colour:
Bright gray to iron black
Streak:
Brownish-black
Hardness:
Hardness:
VHN100=231 - 297 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
Perfect
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.
Density:
4.98 - 5.34 g/cm3 (Measured)    5.46 g/cm3 (Calculated)

Optical Data of CredneriteHide

Type:
Anisotropic
Anisotropism:
strong
Bireflectance:
Strong; pale yellow to brownish gray
Colour in reflected light:
cream white

Chemical Properties of CredneriteHide

Formula:
CuMnO2

Crystallography of CredneriteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C1 2/m 1
Cell Parameters:
a = 5.58 Å, b = 2.87 Å, c = 5.87 Å
β = 104°
Ratio:
a:b:c = 1.944 : 1 : 2.045
Unit Cell V:
91.21 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Occurs in thin six-sided plates; radiating, hemispherical or spherulitic aggregates. Earthy coatings.
Twinning:
Three-fold set of striae intersecting on the plate at about 60° may represent twin lamellae. Polysynthetic twinning noted in polished sections at times.
Comment:
on synthetic material

X-Ray Powder DiffractionHide

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

Type Occurrence of CredneriteHide

Synonyms of CredneriteHide

Other Language Names for CredneriteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Mendipite11 photos of Crednerite associated with Mendipite on mindat.org.
Chloroxiphite9 photos of Crednerite associated with Chloroxiphite on mindat.org.
Cerussite8 photos of Crednerite associated with Cerussite on mindat.org.
Mereheadite7 photos of Crednerite associated with Mereheadite on mindat.org.
Calcite5 photos of Crednerite associated with Calcite on mindat.org.
Baryte1 photo of Crednerite associated with Baryte on mindat.org.
Malachite1 photo of Crednerite associated with Malachite on mindat.org.
Manganoan Calcite1 photo of Crednerite associated with Manganoan Calcite on mindat.org.
Diaboleite1 photo of Crednerite associated with Diaboleite on mindat.org.
Quartz1 photo of Crednerite associated with Quartz on mindat.org.

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.15McconnelliteCuCrO2Trig.
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
4.AB.30PalladinitePdOTet.

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
7.3.4SpertiniiteCu(OH)2Orth.
7.3.6DelafossiteCuFeO2Trig. 3m (3 2/m)
7.3.7CuprospinelCu2+Fe3+2O4Iso.

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

ⓘ - 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.
Germany
 
  • North Rhine-Westphalia
    • Bergisches Land
      • 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
    • Siegerland
      • Hilchenbach
        • Müsen
Der Aufschluss 2000(2), 71-123
  • Thuringia
    • Thuringian Forest
      • 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".
Italy
 
  • Liguria
    • Genova Province
      • Ne
        • Graveglia Valley
[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 Vara
EDX probed by AMI-SIUK. March/08/2013
  • Lombardy
    • Sondrio Province
      • Valtellina
        • Malenco Valley
          • Torre di Santa Maria
AA. VV., 1996. Collezionare minerali. Hobby & Work.
        • Masino Valley
AA. VV., 1996. Collezionare minerali. Hobby & Work.
Japan
 
  • Honshu Island
    • Tohoku Region
      • 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;
  • Shikoku Island
    • Ehime Prefecture
      • Ikata (Sadamisaki Peninsula)
http://www.issp.u-tokyo.ac.jp/labs/mdcl/lab/denken/wordpress/?page_id=803
Mexico
 
  • Baja California Sur (BC Sur)
    • Mun. de Mulegé
      • Santa Rosalía
[MinRec 29:43]; Copper Handbook 1911
Morocco
 
  • 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
    • Ouarzazate Province
FAVREAU G. & DIETRICH J.E. (2006) Tachgagalt (Maroc), Le Cahier des Micromonteurs, 93, 37-71. (in French)
Namibia
 
  • Otjozondjupa Region
    • Grootfontein District
      • 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
Romania
 
  • Suceava Co.
    • Suceava district
      • Iacobeni (Jakobeny; Jacobeny; Jakabfalva)
http://minerals-of-the-carpathians.eu
Serbia
 
  • Zaječar District
    • Bor area
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)
Spain
 
  • Catalonia
    • Girona (Gerona)
      • Ripollès
        • Camprodon
          • Rocabruna
Joan Rosell
Sweden
 
  • Värmland
    • 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
Switzerland
 
  • Wallis (Valais)
    • 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)
UK
 
  • England
    • Bristol
      • Westbury on Trym
BMS Database
    • Somerset
      • 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.
      • Mendip
        • Nunney
BMS Database
        • Priddy
[Clark, 1993 - "Hey's Mineral Index"] [MinRec 27:253]
USA
 
  • Arizona
    • Cochise Co.
      • Dragoon Mts
        • Turquoise District (Courtland-Gleeson District)
R.O. Meyer collection
      • Mule Mts
        • Warren District
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
  • California
    • Napa Co.
      • Mayacmas Mts (Mayacamas Mts)
        • Calistoga District (Silverado 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 Mts
R&M 66:3 pp 196-224
  • Utah
    • Utah Co.
      • East Tintic Mts
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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