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Pecoraite

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Big Photo

Nullagine, Western Australia, Australia
© Martin Patus

Show Pecoraite Photos (5)



Formula:
Ni
 
3
(Si
 
2
O
 
5
)(OH)
 
4
System:MonoclinicColour:Green, blue-green ...
Member of:Serpentine Group
Name:
For Dr. William Thomas Pecora (1913-1972) Director of USGS and student of nickel silicate deposits.
Dimorph of:Népouite


Kaolinite-Serpentine Group

Classification of Pecoraite

IMA status:Approved
Strunz 8th edition ID:8/H.27-160
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:71.1.2d.4

71 : PHYLLOSILICATES Sheets of Six-Membered Rings
1 : Sheets of 6-membered rings with 1:1 layers
Hey's CIM Ref.:14.26.2

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

Type Locality:Wolf Creek meteorite crater, Western Australia, Australia
Place of Conservation of Type Material:Smithsonian 128111
Year of Discovery:1969
Geological Setting of type material:Weathered meteorite

Occurrences of Pecoraite

Geological Setting:Shears in ultramafic rocks, weathering product of millerite in geodes.

Physical Properties of Pecoraite

Lustre:Waxy, Earthy
Diaphaneity (Transparency):Translucent
Colour:Green, blue-green yellow-green
Density (measured):3.084 g/cm3
Density (calculated):3.47 g/cm3
Comment:Measured with absorbed water

Crystallography of Pecoraite

Crystal System:Monoclinic
Cell Parameters:a = 5.26Å, b = 9.16Å, c = 14.7Å
β = 92°
Ratio:a:b:c = 0.574 : 1 : 1.605
Unit Cell Volume:V 707.84 ų (Calculated from Unit Cell)
Morphology:Curved plates, spirals, and tubes, granular, massive.

Optical Data of Pecoraite

Type:Biaxial (+/-)
RI values: nα = 1.565 nβ = 1.565 - 1.603 nγ = 1.565 - 1.603
Maximum Birefringence:δ = 0.000 - 0.038

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

Chemical Properties of Pecoraite

Formula:
Ni
 
3
(Si
 
2
O
 
5
)(OH)
 
4
Essential elements:H, Ni, O, Si
All elements listed in formula:H, Ni, O, Si
Common Impurities:Al,Fe,Mg,Ca,H2O

Relationship of Pecoraite to other Species

Member of:Serpentine Group
Other Members of Group:

- +
Amesite
Mg
 
2
Al(AlSiO
 
5
)(OH)
 
4
Antigorite
Mg
 
3
(Si
 
2
O
 
5
)(OH)
 
4
Berthierine
(Fe,Fe,Mg)
 
2-3
((Si,Al)
 
2
O
 
5
)(OH)
 
4
Brindleyite
(Ni,Mg,Fe)
 
2
(Al(Si,Al)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
LiAl
 
4
(BSi
 
3
O
 
10
)(OH)
 
6
Nacrite
Al
 
2
(Si
 
2
O
 
5
)(OH)
 
4
Népouite
(Ni,Mg)
 
3
(Si
 
2
O
 
5
)(OH)
 
4
Odinite
(Fe,Mg,Al,Fe,Ti,Mn)
 
2.4
((Si,Al)
 
2
O
 
5
)(OH)
 
4
Orthochrysotile
Parachrysotile
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,Fe,Mg)
 
2-3
((Si,Al)
 
2
O
 
5
)(OH)
 
4
9.ED.15Brindleyite
(Ni,Mg,Fe)
 
2
(Al(Si,Al)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
LiAl
 
4
(BSi
 
3
O
 
10
)(OH)
 
6
9.ED.15Népouite
(Ni,Mg)
 
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
14.26.3Népouite
(Ni,Mg)
 
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 Pecoraite

Synonyms:
IMA1969-005
Other Languages:
German:Pecorait
Spanish:Pecoraita

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 Pecoraite

Reference List:

- +
American Mineralogist (1969): 54: 1740.

Neues Jahrbuch für Mineralogie, Monatshefte (1983): 11: 513-523.

Internet Links for Pecoraite

Search Engines:
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    • External Links:
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  • Look for Pecoraite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Pecoraite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
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  • Find Pecoraite on www.crystalclassics.co.uk
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    • Localities for Pecoraite

    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.
    Hide Locality List
    (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
    		Anderson, P., Bottrill, R. & Davidson, P. (2002): Famous mineral localities: The Lord Brassey mine, Tasmania. Mineralogical Record 33, 321-332
    • Western Australia
      • Coolgardie Shire
        • Kambalda
          • Kambalda Nickel deposit
            • Otter Juan mine
    		Mineralogical Magazine 1981 44 : 333-337.
      • Goldfields-Esperance region
        • Kalgoorlie-Boulder City
          • Goongarrie
    		Mineralogical Magazine 1981 44 : 333-337.
      • Pilbara Region
        • East Pilbara Shire
          • Nullagine
    		Nickel, E. H.; Hallbert, J. A.; Halligan, R. (1979): Unusual nickel mineralization at Nullagine, Western Australia. Journal of the Geological Society of Australia 26, 61-71.
      • Widgiemooltha
    		No reference listed
    MM 44 (1981), 153; HB2/2 (1995)
    Canada
     
    • Québec
      • Estrie
        • Le Val-Saint-François RCM
          • St-Denis-de-Brompton
    		No reference listed
    Dominican Republic
     
    • Monseñor Nouel Province
      • Bonao
    		M.E. Ciriotti (Steffen Moeckel analysis) 06/09/2007
    France
     
    • Provence-Alpes-Côte d'Azur
      • Alpes-Maritimes
        • Guillaumes
          • Daluis
    		[MinRec 32:312]
    Germany
     
    • Saxony
      • Vogtland
        • Plauen
          • Jocketa-Neuensalz District
            • Jocketa
    		M Adelt collection
    Italy
     
    • Lombardy
      • Sondrio Province
    		Lapis, 19 (10), 15-21+86.
    Morocco
     
    • Souss-Massa-Draâ Region
      • Ouarzazate Province
        • Tazenakht
          • Bou Azer District (Bou Azzer District)
    		Gunnar Farber specimens (with nickeltalmessite)
    Russia
     
    www.minsocam.org/msa/Handbook/Pecoraite.PDF.
      • Middle Urals
        • Ekaterinburgskaya (Sverdlovskaya) Oblast'
          • Rezh District
    		P.M. Kartashov data
          • Serov District
            • Kola massif
    		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.
      • Southern Urals
        • Chelyabinsk Oblast'
          • Ufaley (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.
    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.
    Talovina, I.V., Lazarenkov, V.G., and Vorontsova, N.I. (2003): Lithology and Mineral Resources 38(5), 403-415.
    South Africa
     
    • Mpumalanga Province
      • Barberton District
        • Kaapsche Hoop (Kaapsehoop)
    		Minerals of South Africa
    South Korea
     
    • Gyeonggi-do (Kyonggi-do)
      • Gwancheon city (Kwancheon)
    		[AmMin 84:687]
    USA
     
    • Arizona
      • Cochise Co.
        • Dragoon Mts
          • Turquoise District (Courtland-Gleeson District)
    		Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 323.
    • California
      • San Benito Co.
        • Diablo Range
          • New Idria District
            • Idria (New Idria)
    		No reference listed
            • Picacho Peak
    		Mineralogical Record: 36(4): 337-363.
      • Sonoma Co.
        • Mayacmas Mts (Mayacamas Mts)
          • West Mayacmas District
            • Cloverdale
              • North Fork Little Sulphur Creek
    • Michigan
      • Marquette Co.
    		George W. Robinson and S.M. Carlson (2009) What's New in Michigan Minerals. Presentation at The 36th Rochester Mineralogical Symposium, April 23-26, 2009.
    • Missouri
    		www.gswweb.org/minutes/GSW1980.htm
    R&M 73:2 pp 98-117
    R&M 73:2 pp 98-117
    • New York
      • Jefferson Co.
        • Antwerp
    		George Robinson & Steven Chamberlain (2007) Gazetteer of major New York State mineral localities. Rocks & Minerals, 82, #6, 472-483.; George Robinson & Steven Chamberlain (2007) Gazetteer of major New York State mineral localities. Rocks & Minerals, 82, #6, 472-483.
    • Oregon
      • Douglas Co.
        • Riddle District
          • Riddle
    		www.minsocam.org/msa/Handbook/Pecoraite.PDF.
    • Vermont
      • Orleans & Lamoille Cos.
        • Lowell & Eden
    		Rocks & Min. Vol. 71, (1996)
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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