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Plancheite

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Formula:
Cu
 
8
(Si
 
8
O
 
22
)(OH)
 
4
· H
 
2
O
System:OrthorhombicColour:Blue, greenish blue
Hardness:6
Name: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

IMA status:Approved
Strunz 8th edition ID:8/F.05-10
Nickel-Strunz 10th (pending) edition ID:9.DB.35

9 : SILICATES (Germanates)
D : Inosilicates
B : Inosilicates with 2-periodic single chains, Si2O6; Pyroxene-related minerals
Dana 8th edition ID:66.2.1.1

66 : INOSILICATES Double-Width,Unbranched Chains,(W=2)
2 : Amphiboles - Ca subgroup
Hey's CIM Ref.:14.2.3

14 : Silicates not Containing Aluminum
2 : Silicates of Cu
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Type Occurrence of Plancheite

Type Locality:Sanda carriere (Sanda quarry; Sanda Mine), Mindouli, Mindouli District, Pool Department, Republic of Congo (Brazzaville)
Year of Discovery:1908

Occurrences of Plancheite

Geological Setting:Secondary mineral in copper deposits

Physical Properties of Plancheite

Lustre:Silky
Diaphaneity (Transparency):Translucent
Colour:Blue, greenish blue
Hardness (Mohs):6
Density (measured):3.65 - 3.8 g/cm3
Density (calculated):3.85 g/cm3

Crystallography of Plancheite

Crystal System:Orthorhombic
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
Ratio:a:b:c = 0.946 : 1 : 0.262
Unit Cell Volume:V 2,019.69 ų (Calculated from Unit Cell)
Z:4
Morphology:Fibrous

Optical Data of Plancheite

Type:Biaxial (+)
RI values: nα = 1.645 nβ = 1.660 nγ = 1.715
Maximum Birefringence:δ = 0.070

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:relatively strong
Pleochroism:Visible
Comments:X= pale blue
Y=Z= blue

Chemical Properties of Plancheite

Formula:
Cu
 
8
(Si
 
8
O
 
22
)(OH)
 
4
· H
 
2
O
Simplified for copy/paste:Cu8(Si8O22)(OH)4·H2O
Essential elements:Cu, H, O, Si
All elements listed in formula:Cu, H, O, Si

Relationship of Plancheite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.DB.05Balipholite
BaLiMg
 
2
Al
 
3
(Si
 
2
O
 
6
)
 
2
(OH)
 
4
9.DB.05Carpholite
Mn
2+
 
Al
 
2
(Si
 
2
O
 
6
)(OH)
 
4
9.DB.05Ferrocarpholite
(Fe
2+
 
,Mg)Al
 
2
(Si
 
2
O
 
6
)(OH)
 
4
9.DB.05Magnesiocarpholite
(Mg,Fe
2+
 
)Al
 
2
(Si
 
2
O
 
6
)(OH)
 
4
9.DB.05Potassiccarpholite
(K,☐)(Li,Mn
2+
 
)
 
2
Al
 
4
(Si
 
2
O
 
6
)
 
2
(OH,F)
 
8
9.DB.05Vanadiocarpholite
Mn
2+
 
V
3+
 
Al(Si
 
2
O
 
6
)(OH)
 
4
9.DB.10Lorenzenite
Na
 
2
Ti
 
2
(Si
 
2
O
 
6
)O
 
3
9.DB.15Lintisite
LiNa
 
3
Ti
 
2
(Si
 
2
O
 
6
)
 
2
O
 
2
· 2H
 
2
O
9.DB.15Punkaruaivite
LiTi
 
2
(HSi
 
4
O
 
12
)(OH)
 
2
· H
 
2
O
9.DB.17Eliseevite
LiNa
 
1.5
Ti
 
2
(H
 
1.5
Si
 
4
O
 
12
)O
 
2
· 2H
 
2
O
9.DB.20Kukisvumite
Na
 
6
ZnTi
 
4
(Si
 
8
O
 
24
)O
 
4
· 4H
 
2
O
9.DB.20Manganokukisvumite
Na
 
6
MnTi
 
4
(Si
 
8
O
 
24
)O
 
4
· 4H
 
2
O
9.DB.25Vinogradovite
(Na,Ca,K)
 
4
Ti
 
4
AlSi
 
6
O
 
23
(OH) · 2H
 
2
O
9.DB.25Paravinogradovite
Na
 
1-2
(Ti,Fe
3+
 
)
 
4
(Si
 
2
O
 
6
)
 
2
(AlSi
 
3
O
 
10
)(OH)
 
4
· H
 
2
O
9.DB.30Nchwaningite
Mn
2+
2
(SiO
 
3
)(OH)
 
2
· H
 
2
O
9.DB.40Shattuckite
Cu
 
5
(Si
 
2
O
 
6
)
 
2
(OH)
 
2
9.DB.40UM2005-31-SiO:CuH
Cu
 
11
(SiO
 
4
)(OH)
 
18
· 9H
 
2
O ?
9.DB.45Aerinite
(Ca
 
5.1
Na
 
0.5
)(Fe
3+
 
,Al,Fe
2+
 
,Mg)
 
4
(Al,Mg)
 
6
[HSi
 
12
O
 
36
(OH)
 
12
][(CO
 
3
)
 
1.2
(H
 
2
O)
 
12
]
9.DB.50Capranicaite
KCaNaAl
 
4
B
 
4
Si
 
2
O
 
18
Related Minerals - Hey's Index Grouping:

- +
14.2.1Dioptase
CuSiO
 
3
· H
 
2
O
14.2.2Shattuckite
Cu
 
5
(Si
 
2
O
 
6
)
 
2
(OH)
 
2
14.2.4Gilalite
Cu
 
5
Si
 
6
O
 
17
· 7H
 
2
O
14.2.5Chrysocolla
Cu
 
2-x
Al
 
x
(H
 
2-x
Si
 
2
O
 
5
)(OH)
 
4
· nH
 
2
O (x < 1)
14.2.6Litidionite
CuNaKSi
 
4
O
 
10
14.2.7Reinhardbraunsite
Ca
 
5
(SiO
 
4
)
 
2
(OH,F)
 
2
14.2.8Cuprorivaite
CaCu[Si
 
4
O
 
10
]
14.2.9Kinoite
Ca
 
2
Cu
 
2
(H
 
2
O)
 
2
[Si
 
3
O
 
10
]
14.2.10Stringhamite
CaCu(SiO
 
4
) · H
 
2
O
14.2.11Apachite
Cu
 
9
Si
 
10
O
 
29
· 11H
 
2
O

Other Names for Plancheite

Synonyms:
KatangaiteKatangite
Other Languages:
German:Planchéit
Russian:Планшеит
Spanish:Planchéita

Other Information

Health Warning: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

Search Engines:
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  • External Links:
  • Look for Plancheite on Webmineral
  • Look for Plancheite on Athena Mineralogy
  • Look for Plancheite on Wikipedia
  • Look for Plancheite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Planchéite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
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  • Specimens:The following Plancheite specimens are currently listed for sale on minfind.com.

    Localities for Plancheite

    The 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. ? 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.
    Antarctica
     
    • 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.
    Argentina
     
    • 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)
    France
     
    • Rhône-Alpes
      • Rhône
        • Le Bois d'Oingt
          • Chessy-les-Mines
    [Le Cahier des Micromonteurs 1988, 4, p.6-46]
    Germany
     
    • Rhineland-Palatinate
      • Palatinate
        • Winnweiler
          • Imsbach
    Wittern: "Mineralfundorte in Deutschland", 2001
    Italy
     
    • 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
    • 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.
    Japan
     
    • Honshu Island
      • Tohoku Region
        • Akita Prefecture
    Akira Kato (1973) Sakurai Koubutsu Hyohon, 63. (Sakurai collection)
    Mexico
     
    • 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
    Namibia
     
    • 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
    [MinRecord 28:124]
    Am Min (1959) 44:682-685
      • Otavi
        • Finsterbergen Farm 469
    [MinRecord 28:125]
    Bezing, L. von, Bode, R. & Jahn, S. (2007): Namibia. Mineralien und Fundstellen. Edition Schloss Freudenstein, Bode Verlag, Haltern. (in German)
    Norway
     
    • Sør-Trøndelag
      • Oppdal
    Witsø, T. (1995): Mineraler i Oppdal med beskrivelse. Driva Kro og Steinsenter. Unpublished paper. http://vinstradalen.no/pdf/Mineraler.pdf
    Witsø, T. (1995): Mineraler i Oppdal med beskrivelse. Driva Kro og steinsenter. Unpublished paper. http://vinstradalen.no/pdf/Mineraler.pdf
    Republic of Congo (Brazzaville)
     
    • Pool Department
      • Kindanba District
        • Renéville
          • Renéville Mine (Djoué Mines)
    Demetrius Pohl, http://www.mindat.org/mesg-6-234115.html
      • Mindouli District
    Rob Lavinsky photo
        • Mindouli
    American Mineralogist (1977), 62, pp. 491-502
    South Africa
     
    • Limpopo Province
      • Vhembe District
        • Messina
    Minerals of South Africa
    • Northern Cape Province
      • Namakwa District (Namaqualand)
    Minerals of South Africa
    UK
     
    • England
      • Cheshire
        • Alderley Edge
    No reference listed
      • Cornwall
        • St Austell District
          • Treverbyn
            • Stenalees
    [Golley & Williams, 1995, 48 - "Cornish Mineral Reference Manual"]
      • Cumbria
        • North and Western Region (Cumberland)
          • Caldbeck Fells
    No reference listed
    USA
     
    • 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.
      • 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
    • Utah
      • Beaver Co.
        • Beaver Lake Mts
    UGMS Bull 117 Minerals and Mineral Localities of Utah
    Zambia
     
    • Copperbelt Province
      • Kalulushi District
        • Chambishi
    No reference listed
    • North-Western Province
      • Solwezi District
    personal visits and collecting in 1996 and 1997
    Mineral and/or Locality  
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