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Népouite

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Formula:
(Ni,Mg)
 
3
(Si
 
2
O
 
5
)(OH)
 
4
System:OrthorhombicColour:Pale green
Hardness:2 - 2½
Member of:Kaolinite-Serpentine Group
Name:Named after type locality

Classification of Népouite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:8/H.27-150
Nickel-Strunz 10th (pending) edition ID:9.ED.15

9 : SILICATES (Germanates)
E : Phyllosilicates
D : Phyllosilicates with kaolinite layers composed of tetrahedral and octahedral nets
Dana 8th edition ID:71.1.2b.3

71 : PHYLLOSILICATES Sheets of Six-Membered Rings
1 : Sheets of 6-membered rings with 1:1 layers
Hey's CIM Ref.:14.26.3

14 : Silicates not Containing Aluminum
26 : Silicates of Ni
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Type Occurrence of Népouite

Type Locality:Népoui Mine, Poya North Commune, Northern Province, New Caledonia

Physical Properties of Népouite

Lustre:Vitreous, Pearly
Colour:Pale green
Streak:Greenish white
Hardness (Mohs):2 - 2½

Crystallography of Népouite

Crystal System:Orthorhombic
X-Ray Powder Diffraction:
d-spacingIntensity
7.31 (100)
4.55 (50b)
3.63 (90)
2.894 (60)
2.501 (70)
2.321 (40)
1.530 (60)

Optical Data of Népouite

Type:Biaxial (-)
RI values: nα = 1.600 - 1.630 nγ = 1.635 - 1.650
Maximum Birefringence:δ = 0.035

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r > v medium

Chemical Properties of Népouite

Formula:
(Ni,Mg)
 
3
(Si
 
2
O
 
5
)(OH)
 
4
Simplified for copy/paste:(Ni,Mg)3(Si2O5)(OH)4
Essential elements:H, Ni, O, Si
All elements listed in formula:H, Mg, Ni, O, Si

Relationship of Népouite to other Species

Series:Forms a series with Lizardite (see here)
Member of:Kaolinite-Serpentine Group
Other Members of Group:

- +
Amesite
Mg
 
2
Al(AlSiO
 
5
)(OH)
 
4
Antigorite
Mg
 
3
(Si
 
2
O
 
5
)(OH)
 
4
Baumite
(Mg,Al,Mn,Zn,Fe)
 
3
(Si,Al)
 
2
O
 
5
(OH)
 
4
Berthierine
(Fe
2+
 
,Fe
3+
 
,AlMg)
 
2-3
((Si,Al)
 
2
O
 
5
)(OH)
 
4
Brindleyite
(Ni,Al)
 
3
(Si,Al)
 
2
O
 
5
(OH)
 
4
Caryopilite
(Mn,Mg)
 
3
(Si
 
2
O
 
5
)(OH)
 
4
Chrysotile
Mg
 
3
(Si
 
2
O
 
5
)(OH)
 
4
Clinochrysotile
Cronstedtite
Fe
2+
2
Fe
3+
 
((Si,Fe
3+
 
)
 
2
O
 
5
)(OH)
 
4
Dickite
Al
 
2
(Si
 
2
O
 
5
)(OH)
 
4
Fraipontite
(Zn,Al)
 
3
((Si,Al)
 
2
O
 
5
)(OH)
 
4
Greenalite
Fe
 
2-3
(Si
 
2
O
 
5
)(OH)
 
4
Halloysite
Al
 
2
(Si
 
2
O
 
5
)(OH)
 
4
Kaolinite
Al
 
2
(Si
 
2
O
 
5
)(OH)
 
4
Kellyite
Mn
2+
2
Al(AlSiO
 
5
)(OH)
 
4
Lizardite
Mg
 
3
(Si
 
2
O
 
5
)(OH)
 
4
Manandonite
Li
 
2
Al
 
4
(Si
 
2
AlB)O
 
10
(OH)
 
8
Nacrite
Al
 
2
(Si
 
2
O
 
5
)(OH)
 
4
Odinite
(Fe,Mg,Al,Fe,Ti,Mn)
 
2.4
((Si,Al)
 
2
O
 
5
)(OH)
 
4
Orthochrysotile
Parachrysotile
Pecoraite
Ni
 
3
(Si
 
2
O
 
5
)(OH)
 
4
Related Minerals - Nickel-Strunz Grouping):

- +
9.ED.05Dickite
Al
 
2
(Si
 
2
O
 
5
)(OH)
 
4
9.ED.05Kaolinite
Al
 
2
(Si
 
2
O
 
5
)(OH)
 
4
9.ED.05Nacrite
Al
 
2
(Si
 
2
O
 
5
)(OH)
 
4
9.ED.05Odinite
(Fe,Mg,Al,Fe,Ti,Mn)
 
2.4
((Si,Al)
 
2
O
 
5
)(OH)
 
4
9.ED.10Halloysite
Al
 
2
(Si
 
2
O
 
5
)(OH)
 
4
9.ED.10Hisingerite
Fe
3+
2
(Si
 
2
O
 
5
)(OH)
 
4
· 2H
 
2
O
9.ED.10Halloysite-7Å
Al
 
2
(Si
 
2
O
 
5
)(OH)
 
4
9.ED.15Amesite
Mg
 
2
Al(AlSiO
 
5
)(OH)
 
4
9.ED.15Antigorite
Mg
 
3
(Si
 
2
O
 
5
)(OH)
 
4
9.ED.15Berthierine
(Fe
2+
 
,Fe
3+
 
,AlMg)
 
2-3
((Si,Al)
 
2
O
 
5
)(OH)
 
4
9.ED.15Brindleyite
(Ni,Al)
 
3
(Si,Al)
 
2
O
 
5
(OH)
 
4
9.ED.15Caryopilite
(Mn,Mg)
 
3
(Si
 
2
O
 
5
)(OH)
 
4
9.ED.15Chrysotile
Mg
 
3
(Si
 
2
O
 
5
)(OH)
 
4
9.ED.15Cronstedtite
Fe
2+
2
Fe
3+
 
((Si,Fe
3+
 
)
 
2
O
 
5
)(OH)
 
4
9.ED.15Fraipontite
(Zn,Al)
 
3
((Si,Al)
 
2
O
 
5
)(OH)
 
4
9.ED.15Greenalite
Fe
 
2-3
(Si
 
2
O
 
5
)(OH)
 
4
9.ED.15Kellyite
Mn
2+
2
Al(AlSiO
 
5
)(OH)
 
4
9.ED.15Lizardite
Mg
 
3
(Si
 
2
O
 
5
)(OH)
 
4
9.ED.15Manandonite
Li
 
2
Al
 
4
(Si
 
2
AlB)O
 
10
(OH)
 
8
9.ED.15Pecoraite
Ni
 
3
(Si
 
2
O
 
5
)(OH)
 
4
9.ED.15Guidottiite
Mn
 
2
Fe
3+
 
(Fe
3+
 
SiO
 
5
)(OH)
 
4
9.ED.20Allophane
(Al
 
2
O
 
3
)(SiO
 
2
)
 
1.3-2
· 2.5-3H
 
2
O
9.ED.20Chrysocolla
Cu
 
2-x
Al
 
x
(H
 
2-x
Si
 
2
O
 
5
)(OH)
 
4
· nH
 
2
O (x < 1)
9.ED.20Imogolite
Al
 
2
SiO
 
3
(OH)
 
4
9.ED.20Neotocite
(Mn,Fe,Mg)SiO
 
3
· H
 
2
O
9.ED.25Bismutoferrite
Fe
3+
2
Bi(SiO
 
4
)
 
2
(OH)
9.ED.25Chapmanite
Fe
3+
2
Sb
3+
 
(SiO
 
4
)
 
2
(OH)
Related Minerals - Hey's Index Grouping:

- +
14.26.1Liebenbergite
(Ni,Mg)
 
2
SiO
 
4
14.26.2Pecoraite
Ni
 
3
(Si
 
2
O
 
5
)(OH)
 
4
14.26.4Willemseite
(Ni,Mg)
 
3
(Si
 
4
O
 
10
)(OH)
 
2
14.26.5Karpinskite
(Ni,Mg)
 
2
Si
 
2
O
 
5
(OH)
 
2
(?)
14.26.6Falcondoite
(Ni,Mg)
 
4
Si
 
6
O
 
15
(OH)
 
2
· 6H
 
2
O

Other Names for Népouite

Synonyms:
Lizardite-Ni
Other Languages:
German:Népouit
Simplified Chinese:镍绿泥石
Spanish:Népouita

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 Népouite

Reference List:

- +
American Mineralogist (1975): 60: 863-871.

Mineralogical Magazine (1981): 44: 153.

Internet Links for Népouite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Népouite details from Handbook of Mineralogy (PDF)
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  • Localities for Népouite

    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.
    Australia
     
    • Tasmania
      • Heazlewood district
    RRUFF Project Specimen ID: R050268
    • Western Australia
      • Coolgardie Shire
        • Kambalda
          • Kambalda Nickel mines
            • Otter Juan mine
    Eardleyite as a Product of the Supergene Alteration of Nickel Sulphides in Western Australia; E Nickel, C Davis, M Bussell, P Bridge, J Dunn, R Macdonald; American Mineralogist, Vol 62, pp 449-457, 1977
        • Widgiemooltha
    No reference listed
      • Wiluna Shire
        • Mount Keith
    Grguric, B.A. (2003) Minerals of the MKD5 nickel deposit, Mount Keith, Western Australia. Australian Journal of Mineralogy, Vol. 9, No. 2 , pg. 55-71.
    Austria
     
    • Carinthia
      • Hohe Tauern
        • Reißeck group
          • Gmünd
    G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
            • Radlgraben
    G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
    Burundi
     
    • Rutana Province
    The Royal Museum for Central Africa (RMCA), sample # 13204; http://metafro.be/mineralogy/browse_hierarchical_geo?country=Burundi
    Canada
     
    • Newfoundland and Labrador
      • Newfoundland
        • Baie Verte Peninsula
          • Baie Verte
            • Advocate Ophiolite complex
    Escayola, M., Garuti, G., Zaccarini, F., Proenza, J.A., Bédard, J.H. & Van Staal, C. (2011) Chromitite and platinum-group-element mineralization at Middle Arm Brook, Advocate Ophiolite complex, Baie Verte Peninsula, Newfoundland, Canada. Canadian Mineralogist 49, 1523-1547.
    China
     
    • Yunnan Province
      • Wenshan Autonomous Prefecture
        • Malipo Co.
    Kaiji Yu (1981): Geology and Prospecting 17(1), 19-25 (in Chinese).
    Czech Republic
     
    • Moravia (Mähren; Maehren)
      • South Moravia Region
    No reference listed
      • Vysočina Region
        • Bystřice nad Pernštejnem
    Pelíšek, J.: Ni-nerosty v serpentinitu západní Moravy. Časopis pro mineralogii a geologii, 1987, roč. 32, č. 2, s. 207.
    Democratic Republic of Congo (Zaïre)
     
    • Katanga (Shaba)
      • Katanga Copper Crescent
        • Shinkolobwe
    MinRec 20:287-288
    Dominican Republic
     
    • Monseñor Nouel Province
      • Bonao
    Rob Lavinsky
    Germany
     
    • Bavaria
      • Franconia
        • Maroldsweisach
    Wittern: "Mineralfundorte in Deutschland", 2001
    • Saxony
      • Glauchau
        • Callenberg
    XRD and SEM-EDX analysis (T. Witzke)
    Greece
     
    • Attikí Prefecture (Attica; Attika)
      • Lavrion District (Laurion; Laurium)
        • Lavrion District Mines
          • Lavrion (Laurion; Laurium)
    No reference listed
    Indonesia
     
    • Moluccas Islands
      • Maluku Province (Moluccas Province)
    Taixu Luo (2008): Geology and Prospecting 52(4), 45-49
    • Sulawesi Island (Celebes Island)
      • Sulawesi Tengah Province (Central Sulawesi Province)
        • Petasia
    Wei Fu, Yongzhang Zhou, Yuanrong Chen, Yunhu Hu, Nanchun Chen, Hujie Niu, Zhiwei Zhang, and Xiaolong Li (2010): Earth Science Frontiers 17(2), 127-139
    Italy
     
    • Piedmont
      • Cuneo Province
        • Po Valley
          • Crissolo
            • Pian Melzé (Pian della Regina)
    Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
      • Torino Province
    Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
        • Susa Valley
          • Almese
    Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
    Japan
     
    • Honshu Island
      • Kinki region
        • Mie Prefecture
          • Toba City
    Minakawa et al (1989) Sanko-Gakkai Kou'en-Youshi, 27.
      • Tohoku Region
        • Fukushima Prefecture
    Matsubara (1996) Memoirs of the National Science Museum, 29, 33-40.
    Morocco
     
    • Souss-Massa-Draâ Region
      • Ouarzazate Province
        • Tazenakht
          • Bou Azer District (Bou Azzer District)
            • Aït Ahmane
    Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
    New Caledonia
    Brindley, G.W. & Hsien Ming Wan. (1975): Compositions, structures, and thermal behavior of nickel-containing minerals in the lizardite-nepouite series. American Mineralogist. 60, 863-871
    • Northern Province
      • Canala Commune
    Dana 6:A2:75.
      • Houaïlou Commune
    Berger, V.I., Singer, D.A., Bliss, J.D., and Moring, B.C., 2011, Ni-Co laterite deposits of the world; database and grade and tonnage models: U.S. Geological Survey Open-File Report 2011-1058.
      • Kouaoua Commune
    Dana 6:A2:75.
      • Kua River
    Dana 6:A2:75.
      • Poya North Commune
        • Népoui
    Dana 6:A2:75.
    C.R.Acad.Sci.Paris (1906) 143, 1173; Bull.Soc.fr.Min.(1907) 30, 17-28
    • Southern Province
      • Comboui River
    Dana 6:A2:75.
      • Yaté Commune
    Wells, Martin A.; Ramanaidou, Erick R.; Verrall, Michael; Tessarolo, Christian (2009): Mineralogy and crystal chemistry of "garnierites" in the Goro lateritic nickel deposit, New Caledonia. European Journal of Mineralogy 21, 467-483. ; Wells, M. A., Ramanaidou, E. R., Verrall, M., & Tessarolo, C. (2009). Mineralogy and crystal chemistry of “garnierites” in the Goro lateritic nickel deposit, New Caledonia. European Journal of Mineralogy, 21(2), 467-483.; Berger, V.I., Singer, D.A., Bliss, J.D., and Moring, B.C., 2011, Ni-Co laterite deposits of the world; database and grade and tonnage models: U.S. Geological Survey Open-File Report 2011-1058.
    Poland
     
    • Lower Silesia (Dolnośląskie)
      • Ząbkowice District
        • Ząbkowice (Frankenstein)
    Spangenberg, K., and Müller, M. (1949): Contributions to Mineralogy and Petrology 1(5/6), 560-572.
    Spangenberg, K., and Müller, M. (1949): Die lateritische Zersetzung des Peridotits bei der Bildung der Nickelerzlagerstätte von Frankenstein in Schlesien. Contributions to Mineralogy and Petrology 1(5/6), 560-572
    Portugal
     
    • Aveiro District
      • Albergaria-a-Velha
        • Branca
    Marques de Sá, J. & Leal Gomes, C. (2010): Les mines de cuivre et nickel de Palhal et Telhadela, Albergaria-a-Velha, Aveiro, Portugal. Le Règne Minéral, 92, 36-47.
    Russia
     
    • Urals Region
      • Middle Urals
        • Sverdlovskaya Oblast'
          • Serov District
            • Kola massif
    Mikhailov, B.M. (2000): Lithology and Mineral Resources 35(4), 351-364.
      • Southern Urals
        • Chelyabinsk Oblast'
          • Ufaley District (Ufalei District)
    Talovina, I.V., Lazarenkov, V.G., Ryzhkova, S.O., Ugol'kov, V.L., and Vorontsova, N.I. (2008): Lithology and Mineral Resources 43(6), 588-595.; Berger, V.I., Singer, D.A., Bliss, J.D., and Moring, B.C., 2011, Ni-Co laterite deposits of the world; database and grade and tonnage models: U.S. Geological Survey Open-File Report 2011-1058.
    South Africa
     
    • Limpopo Province
      • Vhembe District
    Cairncross, B. and Dixon, R., (1995) Minerals of South Africa. The Geological Society of South Africa, 227 pp.
    • Mpumalanga Province
      • Ehlanzeni District
        • Barberton
          • Bon Accord
    Am. Min. 61, 502 (1976)
    South Korea
     
    • Gyeonggi-do (Kyonggi-do)
      • Gwancheon city (Kwancheon)
    Song, Y., Moon, H. S., & Chon, H. T. (1995). New occurrence and characterization of Niserpentines in the Kwangcheon area, Korea. Clay Minerals, 30(3), 211-224.
    Spain
     
    • Andalusia
      • Málaga
        • Carratraca
    Romero Silva, JC (2003) Minerales y Rocas de la provincia de Malaga. Published by the Malaga County Council CEDMA. 318pp. 1 map
          • Los Jarales
    Romero Silva JC (2003) Minerales y Rocas de la provincia de Malaga España. Edita CEDMA County council
    Romero Silva JC (2003). Minerales y Rocas de la Provincia de Málaga. CEDMA edition County council. Málaga 318pp
        • Estepona
    Romero Silva, JC (2003). Minerales y Rocas de la provincia de Málaga. Edited by Cedma. Malaga County Council 318 pg. 1 map
        • Ojén
          • Ojén lherzolite massif
    Romero Silva JC (2003) Minerales y Rocas de la provincia de Malaga España. Edita CEDMA County council
        • Ronda Massif
    Romero Silva, JC (2003). Minerales y Rocas de la provincia de Málaga. Edited by Cedma. Malaga County Council 318 pg. 1 map
    • Catalonia
      • Tarragona
        • Priorat
          • Falset
    Joan Abella i Creus specimens; XRD by Dr. Felicià Plana and Josep Elvira, Consejo Superior de Investigaciones Científicas en Barcelona.
    USA
     
    • California
      • Del Norte Co.
        • Klamath Mts
          • Diamond Creek District
            • Rockland
    Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 197; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 422.
          • Gasquet
    Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 422.
          • Rocky Saddle
    Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 422.
      • El Dorado Co.
        • Flagstaff Hill area
          • Pilliken
            • Salmon Falls
    Clark, Wm. B. & D.W. Carlson (1956), Mines and mineral resources of El Dorado County, California: California Journal of Mines and Geology: 52(4): 387, 438; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 197; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 422.
    Montoya, J.W. & Gretta S. Baur (1963), Nickeliferous serpentines, chlorites, and related minerals found in two lateritic ores: American Mineralogist: 48: 1227, 1228.
      • Imperial Co.
        • Coyote Mts
          • Coyote Wells
    Pemberton, H Earl " Minerals of California" Van Nostrand Reinholt Press
            • Coyote Mountain
    Morton, P.K. (1977) Mines and mineral resources of Imperial County, California. California Division of Mines and Geology County Report 7, 104 pp.: 77; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 422.
      • Mariposa Co.
        • Mother Lode Belt
          • Bagby-Mariposa-Mount Bullion-Whitlock District
            • Bagby
              • Pacific Mining Co. group
    Bradley, W.W. (1941), Thirty-seventh report of the State Mineralogist: California Division Mines Report 37: 491; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 422.
      • San Benito Co.
        • Diablo Range
          • New Idria District
            • Idria (New Idria)
    Bradley, W.W. (1938), Thirty-fourth report of the State Mineralogist: California Division Mines Report 34: 608; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 197; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 423.
      • Santa Cruz Co.
        • Santa Cruz
    Mineralogical Record: 17:315
      • Tulare Co.
        • Ivanhoe
          • Venice Hills
    Goodwin, Joseph Grant (1958), Mines and mineral resources of Tulare County, California: California Journal of Mines and Geology (Report 54): 54(3): 344; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 424.
    • New Mexico
      • Luna Co.
    Excalibur Mineral Corporation - Rare Species K-N
    Genth,F.A,1891,The Minerals of North Carolina,pg.63 and pg.88
      • Jackson Co.
        • Webster-Balsam
    Conley,J.F,1958,Mineral Localities of North Carolina,pg 39,32,64
      • Macon Co.
        • Cowee Valley
          • Ellijay District
            • Franklin
              • Corundum Hill
    Genth,F.A,1891,The Minerals of North Carolina,pg63 and pg.103
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