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Cu8(Si4O11)2(OH)4 · H2O
Blue, greenish blue
First described by A. Lacroix (1908) from Mindouli. Named after a French explorer, Mr. Planche, who supplied the samples to Lacroix.
A rare secondary copper silicate.
May be confused with Shattuckite.

Classification of Plancheite

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

9 : SILICATES (Germanates)
D : Inosilicates
B : Inosilicates with 2-periodic single chains, Si2O6; Pyroxene-related minerals

66 : INOSILICATES Double-Width,Unbranched Chains,(W=2)
2 : Amphiboles - Ca subgroup

14 : Silicates not Containing Aluminum
2 : Silicates of Cu

Physical Properties of Plancheite

Diaphaneity (Transparency):
Blue, greenish blue
Hardness (Mohs):
3.65 - 3.8 g/cm3 (Measured)    3.85 g/cm3 (Calculated)

Optical Data of Plancheite

Biaxial (+)
RI values:
nα = 1.645 nβ = 1.660 nγ = 1.715
Max Birefringence:
δ = 0.070
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
relatively strong
X= pale blue
Y=Z= blue

Chemical Properties of Plancheite

IMA Formula:
Cu8(Si4O11)2(OH)4 · H2O
Elements listed in formula:

Crystallography of Plancheite

Crystal System:
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:
a = 19.043(3) Å, b = 20.129(5) Å, c = 5.269(1) Å
a:b:c = 0.946 : 1 : 0.262
Unit Cell Volume:
V 2,019.69 ų (Calculated from Unit Cell)

Occurrences of Plancheite

Type Occurrence of Plancheite

Relationship of Plancheite to other Species

9.DB.15LintisiteNa3LiTi2O2(SiO3)4 · 2H2O
9.DB.15PunkaruaiviteLiTi2Si4O11(OH)3 · H2O
9.DB.17Eliseevite Na1.5Li[Ti2O2(Si4O10.5(OH)1.5)] · 2H2O
9.DB.20KukisvumiteNa6ZnTi4O4(SiO3)8 · 4H2O
9.DB.20ManganokukisvumiteNa6MnTi4Si8O28 · 4H2O
9.DB.25VinogradoviteNa4Ti4(Si2O6)2[(Si,Al)4O10]O4 · (H2O,Na,K)3
9.DB.25Paravinogradovite(Na,◻)2(Ti4+,Fe3+)4(Si2O6)2(Si3AlO10)(OH)4 · H2O
9.DB.30NchwaningiteMn2SiO3(OH)2 · H2O
9.DB.40UM2005-31-SiO:CuHCu11(SiO4)(OH)18 · 9H2O ?
9.DB.45Aerinite(Ca,Na)6(Fe3+,Fe2+,Mg,Al)4(Al,Mg)6[Si12O36(OH)12](CO3) · 12H2O
14.2.1DioptaseCuSiO3 · H2O
14.2.4GilaliteCu5Si6O17 · 7H2O
14.2.5Chrysocolla(Cu2-xAlx)H2-xSi2O5(OH)4 · nH2O
14.2.9KinoiteCa2Cu2Si3O10 · 2H2O
14.2.10StringhamiteCaCuSiO4 · H2O
14.2.11ApachiteCu92+Si10O29 · 11H2O

Other Names for Plancheite

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.

References for Plancheite

Reference List:
Lacroix, A. (1908): Sur une nouvelle espècie minérale, provenant du Congo francaise. Compte rendu Acad. Sci., 146, 722-725

Schaller, W. T. (1919): Plancheite and shattuckite, copper silicates, are not the same mineral. J. Wash. Acad. Sci. 9, 131-134.

Evans, H. T., Jr. & Mrose, M. E. (1966): Shattuckite and plancheite: a crystal chemical study. Science 154, 506-507.

Dell'Anna, L. & Garavelli, C. L. (1967): Plancheite of Capo Calamita, Elba Island. Period. Mineral. 36, 125-146 (in Italian).

Van Oosterwyck-Gastuche, M. C. (1968): Nomenclature of some Katangan copper silicates. Plancheite-shattuckite-bisbeeite-Katangite minerals. Ann. Soc. Géol. Belg. 91, 401-422 (in French).

Kawamura, K., Kawahara, A., Henmi, K. (1976): Hydrothermal synthesis and x-ray study of copper silicate hydrate minerals. Kobutsugaku Zasshi 12, 403-414 (in Japanese).

Evans, H.T. & Mrose, M.E. (1977): The crystal chemistry of the hydrous copper silicates, shattuckite and plancheite. American Mineralogist 62, 491-502.

Frost, R. L. & Xi, F. (2012): A vibrational spectroscopic study of planchéite Cu8Si8O22(OH)4•H2O. Spectrochimica Acta, A91, 314-318.

Internet Links for Plancheite URL:
Please feel free to link to this page.
The following Plancheite specimens are currently listed for sale on

Localities for Plancheite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
  • Western Antarctica
    • Antarctic Peninsula
      • Palmer Land
Vennum, W.R.; Nishi, J.M. (1981) New Antarctic mineral occurrences. Antarctic Journal of the U.S., 16(5), 14-15.
  • Córdoba
    • Colón Department
      • Dumesnil
Colombo, F., Lira, R., Ripley, E. M., & del Tanago, J. G. (2011). Geology, mineralogy and possible origin of the copper mineralization in marble near Saldan, Cordoba (Argentina). Journal of GEOsciences, 56(3), 299-316.
      • Unquillo
Minerals acquired from Nelson Valenzuela
Democratic Republic of Congo (Zaïre)
  • Katanga (Shaba)
    • Katanga Copper Crescent
      • Kambove District
Arliguie M photo
Lapis 17(3), 13-40 (1992)
        • Kamoya
Van King
Van King
Lapis 17(3), 13-40 (1992)
Lapis 17(3), 13-40 (1992)
      • Kolwezi District
        • Kamoto
No reference listed
        • Kolwezi
Rob Lavinsky specimen
No reference listed
        • Mutoshi (Ruwe)
Deliens, M. L (1989) Agardite-(y) De Mutoshi, Shaba, Zaire. Annales de la Societe Geolique de Belgique 112:207-213
      • Lubumbashi (Elizabethville)
Van King
      • Shinkolobwe
Lapis 17(3), 13-40 (1992); Vochten, R., Janssens, J. & Blaton, N. (2005): Reinvestigation of Dioptase-Planchéite Pseudomorphs after Calcite from the Tantara Copper Deposit Katanga, Republique du Congo. Mineralogical Record. 36, 521-524
      • Swambo
Lapis 17(3), 13-40 (1992)
  • Auvergne-Rhône-Alpes
    • Rhône
      • Le Bois d'Oingt
        • Chessy-les-Mines
[Le Cahier des Micromonteurs 1988, 4, p.6-46]
  • Rhineland-Palatinate
    • Palatinate
      • Winnweiler
        • Imsbach
Wittern: "Mineralfundorte in Deutschland", 2001
  • Southern District (HaDarom District)
    • Eilat
Shlomovitch, N., Bar-Matthews, M., & Matthews, A. (1999). Sedimentary and epigenetic copper mineral assemblages in the Cambrian Timna Formation, southern Israel. Israel Journal of Earth Sciences, 48(140), 195-208.
Bartura, Y., & Würzburger, U. (1974). The Timna copper deposit. Annales de la Société géologique de Belgique. p277-285
  • Sardinia
    • Carbonia-Iglesias Province
      • Domusnovas
Moldovan, C., Călugăr, M. I., Onac, B. P., de Waele, J., Naseddu, A., & Fornós, J. J. (2013) A CONTRIBUTION TO THE MINERALOGY OF MONTE GUISI CAVE (SW SARDINIA, ITALY) Cave Mineralogy – poster 2013 ICS Proceedings
        • Oridda
Stara P., Rizzo R. and Tanca G. (1996): Iglesiente e Arburese. Miniere e minerali. E.M.Sa. Ed., pagg. 105-106.
      • Fluminimaggiore
        • Oridda Valley
Pelloux A. (1930): Plancheite di Arenas (Sardegna). p. 154. Periodico di Mineralogia - Roma and Mariani P., Scaini G.: "I minerali d'Italia" - Rizzoli, 1978 and A. Del Caldo, C. Del Moro, C.M. Gramaccioli, M. Boscardin M. "Guida ai Minerali" Fabbri ed. Milano, 1981 and De Michele V. (1975) – Guida Mineralogica d’Italia – Ist. Geogr. De Agostini, Novara
  • Trentino-Alto Adige (Trentino-Südtirol)
    • Trento Province
      • Valsugana
        • Vignola-Falesina
Paolo Gasparetto, Erica Bittarello, Andrea Canal, Lara Casagrande, Marco E. Ciriotti, Bruno Fassina, Paolo Ferretti, Sergio Pegoraro, Fabio Tosato, Paolo Zammatteo (2014): I lavori minerari del Rio Ricet, Vignola, Falesina, Trento. Micro, 12, 50-123.
  • Tuscany
    • Livorno Province
      • Elba Island
        • Capoliveri
          • Cape Calamita Mine (Calamita Mine)
L. Dell'Anna, C.L. Garavelli (1967) - Plancheite di Capo Calamita (Isola d'Elba) - Per. Min., 36: 126-146.
  • Honshu Island
    • Tohoku Region
      • Akita Prefecture
Akira Kato (1973) Sakurai Koubutsu Hyohon, 63. (Sakurai collection); Ohnishi, M., & Shimobayashi, N. (2011). Tsumebite from the Kisamori mine, Akita Prefecture, Japan. Journal of Mineralogical and Petrological Sciences, 106(1), 51-56.
  • Sonora
    • Mun. de Santa Cruz
      • Cuitaca
Moore, T. and M. Origlieri (2008) Famous Mineral Localities: The Milpillas Mine, Cananea District, Sonora, Mexico. Mineralogical Record 39:6 pp 25-34
  • Hardap Region
    • Maltahöhe District
Bezing, L. von, Bode, R. & Jahn, S. (2008): Namibia Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag GmbH, Haltern, 382 pp. (in English)
  • Kunene Region
    • Kaokoveld Plateau
Brandstetter, R. (2012): Dioptas aus Namibia: Sensationelle Neufunde aus der Christoph Mine im Kaokoland. Lapis. 37 (1):13-15
Niedermayr, G., Schnaitmann, E. A., Brandstätter, F. (2008): Das Dioptas-Shattuckit-Vorkommen Kandesei im Kakokoland [sic]. Mineralien-Welt 19, 76-93 (in German).; Bowell, R J et al (2013) Minerals of the Kaokoveld District, Kunene Region, Namibia. Mineralogical Record 44:485-504
Palfi, A. (2005): Spessartin- und Dioptas-Mineralisationen im Kaokoland, Namibia. Mineralien-Welt 16 (4), 49-61 (in German). ; Bowell, R J et al (2013) Minerals of the Kaokoveld District, Kunene Region, Namibia. Mineralogical Record 44:485-504
- Brandstätter, F.; Niedermayr, G.; Schnaitmann,E. A.; Walter F. (2011): Neue Fundstelle in Namibia: Die Van-der-Plas-Mine im Kaokoland. Mineralien Welt 22 (5), 66-75.
    • Khorixas District
      • Mesopotamia Copper Valley
Gerhard Niedermayr: Mesopotamia 504 - die Typlokalität des Namibit; Niedermayr, G.(2001): Mesopotamia 504 - die Typlokalität des Namibit. In: S. Jahn, O. Medenbach, G. Niedermayr, G. Schneider: Namibia - Zauberwelt edler Steine und Kristalle (1 Edition, in German), 97-99
  • Otjikoto Region (Oshikoto)
    • Tsumeb
Gebhard, G. (1999): Tsumeb II. A Unique Mineral Locality. GG Publishing, Grossenseifen, Germany
  • Otjozondjupa Region
    • Grootfontein District
[Mineralogical Record 28:124]
Am Min (1959) 44:682-685
    • Otavi
      • Finsterbergen Farm 469
[Mineralogical Record 28:125]
Bezing, L. von, Bode, R. & Jahn, S. (2007): Namibia. Mineralien und Fundstellen. Edition Schloss Freudenstein, Bode Verlag, Haltern. (in German)
  • Sør-Trøndelag
    • Oppdal
Witsø, T. (1995): Mineraler i Oppdal med beskrivelse. Driva Kro og Steinsenter. Unpublished paper.
Witsø, T. (1995): Mineraler i Oppdal med beskrivelse. Driva Kro og steinsenter. Unpublished paper.
Republic of Congo (Brazzaville)
  • Pool Department
    • Kindanba District
      • Renéville
        • Renéville Mine (Djoué Mines)
Demetrius Pohl,
    • Mindouli District
Rob Lavinsky photo
      • Mindouli
American Mineralogist (1977), 62, pp. 491-502
South Africa
  • Limpopo Province
    • Vhembe District
      • Musina (Messina)
Minerals of South Africa
  • Northern Cape Province
    • Namakwa District (Namaqualand)
Minerals of South Africa
  • Andalusia
    • Huelva
      • Zufre
Calvo, M. (2016). Minerales y Minas de España. Vol VIII.Cuarzo y otros minerales de la sílice. Escuela Técnica Superior de Ingenieros de Minas de Madrid. Fundación Gómez Pardo. 399 págs.
  • England
    • Cheshire
      • Alderley Edge
No reference listed
    • Cornwall
      • St Austell District
        • Treverbyn
          • Stenalees
[Golley & Williams, 1995, 48 - "Cornish Mineral Reference Manual"]
    • Cumbria
      • Caldbeck Fells
No reference listed
  • Arizona
    • Cochise Co.
      • Dragoon Mts
        • Dragoon District (Golden Rule District)
Rolf Luetcke
      • Mule Mts
        • Warren District
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.:69
    • La Paz Co.
      • Little Harquahala Mts
        • Little Harquahala District
          • Salome
            • Martin Peak
              • Bonanza and Golden Eagle Mine group
Ron Gyllenhammer Collection
      • New Water Mts
        • New Water District
          • Moore Mine group
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 330.
    • Maricopa Co.
      • Big Horn Mts
        • Big Horn District
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 330; Montoya, J. (1967), A new occurrence of planchéite in AZ, Rocks & Minerals: 277.
      • Vulture Mts
Eckhard D. Stuart
    • Pima Co.
      • Ajo District
        • Little Ajo Mts
          • Ajo
Thomas, W.J. & R.B. Gibbs (1983), Famous mineral localities: The New Cornelia mine, Ajo, AZ, Min.Rec.: 14: 283-298; Gilluly, J. (1937), AZ Bur. Mines Bull. 141: 68-75, 79-81.
      • Santa Rita Mts
        • Helvetia-Rosemont District
          • Helvetia
            • Monument Mountain
Rolf Luetcke
    • Pinal Co.
      • Galiuro Mts
        • Table Mountain District
          • Table Mountain area
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 183, 330, 421; Bideaux, R.A., et al (1960), Some new occurrences of minerals of Arizona, AZ Geol. Soc. Digest: 3: 53-56; Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 111.
      • Mammoth District
        • Tiger
          • St. Anthony deposit
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 330; Bideaux, R.A. (1980), Tiger, AZ, Min.Rec.: 11: 155-181.
      • San Manuel District
        • San Manuel
          • San Manuel Mine (Apex Lead & Vanadium Mining Corp Mine; Quarelli group)
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 330; Thomas, L.A. (1966), Geology of the San Manuel ore body, in S.R. Titley and C.L. Hicks (editors), Geology of the porphyry copper deposits, southwestern North America, Univ. AZ Press, Tucson: 133-142.
      • Tohono O'odham Indian Reservation
        • Silver Reef District
          • Tat Momoli Mts
            • Chuichu area
              • Silver Reef Mountains area
                • White Horse Pass area
Collected by and in the collection of Brent Thorne
            • Silver Reef Mountains
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 330.
      • Tortolita Mts
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 137, 183, 330; Bideaux, R.A., et al (1960), Some new occurrences of minerals of AZ, AZ Geol.Soc.Digest: 3: 53-56.
    • Yavapai Co.
      • Bradshaw Mts (Bradshaw Range)
        • Castle Creek District
          • Copperopolis
Rolf Luetcke
Rolf Luetcke
            • Whipsaw Gulch (Whipsaw Creek)
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 330.
  • California
    • Inyo Co.
      • Inyo Mts (Inyo Range)
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 515.
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 266, 290, 336.
  • Colorado
    • San Juan Co.
      • Elk Park
Minerals of Colorado (1997) E.B. Eckels
  • Michigan
    • Ontonagon Co.
      • Mass City
Rocks & Min.:58:112.
        • Mass Consolidated Mine
Mineralogy of Michigan (2004) Heinrich & Robinson
  • Nevada
    • Churchill Co.
      • Table Mountain District
        • Cottonwood Canyon
          • Bolivia
NBMG Spec. Pub. 31 Minerals of Nevada
  • New Mexico
    • Luna Co.
      • Cooks Peak District (Cooke's Peak District)
        • Old Hadley (Graphic) Mining District
Walstrom 2006 New Mexico Mineral Symposium abstracts
      • Victorio District
Jerry Cone Collection
  • Utah
    • Beaver Co.
      • Beaver Lake Mts
UGMS Bull 117 Minerals and Mineral Localities of Utah
  • Copperbelt Province
    • Kalulushi District
      • Chambishi
No reference listed
  • North-Western Province
    • Solwezi District
personal visits and collecting in 1996 and 1997
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