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Plancheite

Formula:
Cu
 
8
[(OH)
 
4
|Si
 
8
O
 
22
] · H
 
2
O
System:OrthorhombicColour:Blue, greenish blue
Hardness:6
Name:For a Mr. Planché.


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 Mine, Mindouli, Pool Region, 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
[(OH)
 
4
|Si
 
8
O
 
22
] · H
 
2
O
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
[(OH)
 
4
|Si
 
2
O
 
6
]
 
2
9.DB.05Carpholite
Mn
2+
 
Al
 
2
[(OH)
 
4
|Si
 
2
O
 
6
]
9.DB.05Ferrocarpholite
(Fe
2+
 
,Mg)Al
 
2
[(OH)
 
4
|Si
 
2
O
 
6
]
9.DB.05Magnesiocarpholite
(Mg,Fe
2+
 
)Al
 
2
[(OH)
 
4
|Si
 
2
O
 
6
]
9.DB.05Potassiccarpholite
(K,[])(Li,Mn
2+
 
)
 
2
Al
 
4
[(OH)
 
4
׀ (F,OH)
 
4
׀ (Si
 
2
O
 
6
)
 
2
]
9.DB.05Vanadiocarpholite
Mn
2+
 
V
3+
 
Al[(OH)
 
4
|Si
 
2
O
 
6
]
9.DB.10Lorenzenite
Na
 
2
Ti
 
2
[O
 
3
|Si
 
2
O
 
6
]
9.DB.15Lintisite
LiNa
 
3
Ti
 
2
[O|Si
 
2
O
 
6
]
 
2
· 2H
 
2
O
9.DB.20Kukisvumite
Na
 
6
ZnTi
 
4
Si
 
8
O
 
28
·4H
 
2
O
9.DB.20Manganokukisvumite
Na
 
6
MnTi
 
4
Si
 
8
O
 
28
·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
[(OH)
 
4
|AlSi
 
3
O
 
10
|(Si
 
2
O
 
6
)
 
2
] · H
 
2
O
9.DB.30Nchwaningite
Mn
2+
2
[(OH)
 
2
|SiO
 
3
] · H
 
2
O
9.DB.40Shattuckite
Cu
 
5
[(OH)
 
2
|(SiO
 
3
)
 
4
]
9.DB.40UM2005-31-SiO:CuH
Cu
 
11
(SiO
 
4
)(OH)
 
18
·9H
 
2
O ?
9.DB.45Aerinite
Ca
 
5
(Fe
3+
 
,Al,Fe
2+
 
,Mg)(Al,Mg)
 
6
[HSi
 
12
O
 
36
(OH)
 
12
][(CO
 
3
)
 
1.2
(H
 
2
O)
 
12
]
Related Minerals - Hey's Index Grouping:

- +
14.2.1Dioptase
Cu
 
6
(Si
 
6
O
 
18
)·6H
 
2
O
14.2.2Shattuckite
Cu
 
5
[(OH)
 
2
|(SiO
 
3
)
 
4
]
14.2.4Gilalite
Cu
 
5
Si
 
6
O
 
17
·7H
 
2
O
14.2.5Chrysocolla
(Cu,Al)
 
2
H
 
2
Si
 
2
O
 
5
(OH)
 
4
·nH
 
2
O
14.2.6Litidionite
CuNaKSi
 
4
O
 
10
14.2.7Reinhardbraunsite
Ca
 
5
[(OH,F)
 
2
|(SiO
 
4
)
 
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:Evans, H.T. & M.E. Mrose (1977), The crystal chemistry of the hydrous copper silicates, shattuckite and plancheite, American Mineralogist: 62: 491-502.

Internet Links for Plancheite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Plancheite in the Natural History Museum (London) online catalogue
  • Planchéite details from Handbook of Mineralogy (PDF)
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    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.
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    (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.
    Argentina
     
    • Córdoba
      • Dumesnil
    Alfredo Petrov collection
    Democratic Republic of Congo (Zaïre)
     
    • Katanga (Shaba)
      • Katanga Copper Crescent
        • Central area
          • Kambove
    Lapis 17(3), 13-40 (1992)
            • Kamoya
    Van King
    Lapis 17(3), 13-40 (1992)
    Lapis 17(3), 13-40 (1992)
          • Shinkolobwe
    Lapis 17(3), 13-40 (1992)
          • Swambo
    Lapis 17(3), 13-40 (1992)
        • Western area
          • Kolwezi
            • Kamoto
    No reference listed
    No reference listed
    Rob Lavinsky specimen
    France
     
    • Rhône-Alpes
      • Rhône
    [Le Cahier des Micromonteurs 1988, 4, p.6-46]
    Germany
     
    • Rhineland-Palatinate
      • Kirchheimbolanden
        • Imsbach
    Wittern: "Mineralfundorte in Deutschland", 2001
    Italy
     
    • Sardinia
      • Carbonia-Iglesias Province
        • 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 Cananea
        • 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
     
    • Khomas Region
      • Windhoek District
    Am Min (1959) 44:682-685
    • Kunene Region
      • Damaraland District
        • Khorixas
          • Copper Valley
    Gerhard Niedermayr: Mesopotamia 504 - die Typlokalität des Namibit
      • Kaokoveld Plateau
    Niedermayr, G., Schnaitmann, E. A., Brandstätter, F. (2008): Das Dioptas-Shattuckit-Vorkommen Kandesei im Kakokoland [sic]. Mineralien-Welt 19, 76-93 (in German).
    Palfi, A. (2005): Spessartin- und Dioptas-Mineralisationen im Kaokoland, Namibia. Mineralien-Welt 16 (4), 49-61 (in German).
    • Otjikoto (Oshikoto) Region
      • Tsumeb
    No reference listed
    • Otjozondjupa Region
      • Grootfontein District
    [MinRecord 28:124]
      • Otavi
    [MinRecord 28:125]
    Norway
     
    • Sør-Trøndelag
      • Oppdal
    No reference listed
    No reference listed
    Republic of Congo (Brazzaville)
     
    • Brazzaville Region (Renéville Region)
    • Pool Region
      • Mindouli
    American Mineralogist (1977), 62, pp. 491-502
    South Africa
     
    • Limpopo Province
      • Messina District
        • Messina mine
    Minerals of South Africa
    • Northern Cape Province
      • Namaqualand
    Minerals of South Africa
    UK
     
    • England
      • Cheshire
        • Alderley Edge
    No reference listed
      • Cornwall
        • St Austell District
          • Luxulyan Area (Luxulian Area)
            • Hensbarrow Downs
              • Stenalees
    [Golley & Williams, 1995, 48 - "Cornish Mineral Reference Manual"]
      • Cumbria
        • North and Western Region (Cumberland)
          • Caldbeck Fells
    No reference listed
    USA
     
    • Arizona
      • Cochise Co.
        • Mule Mts
          • Warren District
    No reference listed
      • La Paz Co.
        • 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.
      • 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.
        • Silver Reef Mts
          • Casa Grande
    Collected by and in the collection of Brent Thorne
    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
              • Whipsaw Gulch (Whipsaw Creek)
    Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 330.
    • 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
          • 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
     
    • Central Province
      • Mkushi
    No reference listed
    • North-Western Province
      • Solwezi
    personal visits and collecting in 1996 and 1997
    Mineral and/or Locality
    Google
     
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