Pecoraite (original) (raw)

A valid IMA mineral species

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About PecoraiteHide

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Colour:

Green, blue-green yellow-green

Lustre:

Vitreous, Waxy, Earthy

Crystal System:

Monoclinic

Name:

For Dr. William Thomas Pecora II (1 February 1913, Belleville, New Jersey, USA - 19 July 1972, Washington, D.C., USA), Director of the United States Geological Survey (from 1965 to 1971) and student of nickel silicate deposits. The William T. Pecora Award was established in 1974 to honour Pecora, and is sponsored jointly by the Department of the Interior and the National Aeronautics and Space Administration (NASA). It is presented annually to individuals or groups that make outstanding contributions toward understanding the Earth by means of remote sensing.

Kaolinite-Serpentine Group

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:3139:0

7dfc4112-3b13-4e1e-bb7e-7988ffeebf37

IMA Classification of PecoraiteHide

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IMA Formula:

Ni3Si2O5(OH)4

Type description reference:

Faust, G.T., Fahey, J.J., Mason, B., Dwornik, E.J. (1969) Pecoraite, Ni6Si4O10(OH)8, nickel analog of clinochrysotile, formed in the Wolf Creek meteorite. Science: 165: 59-60.

Classification of PecoraiteHide

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9.ED.15

9 : SILICATES (Germanates)
E : Phyllosilicates
D : Phyllosilicates with kaolinite layers composed of tetrahedral and octahedral nets

71.1.2d.4

71 : PHYLLOSILICATES Sheets of Six-Membered Rings
1 : Sheets of 6-membered rings with 1:1 layers

14.26.2

14 : Silicates not Containing Aluminum
26 : Silicates of Ni

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

Symbol Source Reference
Pco IMA–CNMNC Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
Pco Warr (2020) Warr, L.N. (2020) Recommended abbreviations for the names of clay minerals and associated phases. Clay Minerals, 55, 261–264 doi:10.1180/clm.2020.30

Physical Properties of PecoraiteHide

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Transparency:

Transparent, Translucent

Colour:

Green, blue-green yellow-green

Density:

3.084 g/cm3 (Measured) 3.47 g/cm3 (Calculated)

Comment:

Measured with absorbed water

Optical Data of PecoraiteHide

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RI values:

_n_α = 1.565 - 1.603 _n_β = 1.565 - 1.603 _n_γ = 1.565 - 1.603

δ = 0.000

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Chemistry of PecoraiteHide

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Mindat Formula:

Ni3(Si2O5)(OH)4

Common Impurities:

Al,Fe,Mg,Ca,H2O

Crystallography of PecoraiteHide

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Crystal System:

Monoclinic

Cell Parameters:

a = 5.26 Å, b = 9.16 Å, c = 14.7 Å
β = 92°

Ratio:

a:b:c = 0.574 : 1 : 1.605

Unit Cell V:

707.84 ų (Calculated from Unit Cell)

Morphology:

Curved plates, spirals, and tubes, granular, massive.

Comment:

Point Group: n.d.; Space Group: n.d.

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

d-spacing Intensity
7.43 Å (100)
3.66 Å (75)
1.529 Å (75)
4.50 Å (62)
2.620 Å (62)
2.447 Å (50)

Geological EnvironmentHide

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Geological Setting:

Shears in ultramafic rocks, weathering product of millerite in geodes.

Type Occurrence of PecoraiteHide

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General Appearance of Type Material:

Green grains, 0.1 to 5 mm in diameter, filling cracks a meteorite.

Place of Conservation of Type Material:

National Museum of Natural History, Washington, D.C., USA, 128111.

Geological Setting of Type Material:

Associated Minerals at Type Locality:

Reference:

Faust, G.T., Fahey, J.J., Mason, B., Dwornik, E.J. (1969) Pecoraite, Ni6Si4O10(OH)8, nickel analog of clinochrysotile, formed in the Wolf Creek meteorite. Science: 165: 59-60.

Synonyms of PecoraiteHide

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Other Language Names for PecoraiteHide

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Relationship of Pecoraite to other SpeciesHide

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Other Members of this group:

Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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9.ED. Clinochrysotile Mon. 2/m
9.ED.05 Dickite Al2(Si2O5)(OH)4 Mon. m : B b
9.ED.05 Kaolinite Al2(Si2O5)(OH)4 Tric. 1 : _P_1
9.ED.05 Nacrite Al2(Si2O5)(OH)4 Mon. m : B b
9.ED.05 Odinite (Fe,Mg,Al,Fe,Ti,Mn)2.4((Si,Al)2O5)(OH)4 Mon. m : B m
9.ED.10 Halloysite Al2(Si2O5)(OH)4 Mon. m : B b
9.ED.10 Hisingerite Fe3+2(Si2O5)(OH)4 · 2H2O Mon.
9.ED.10 Hydrohalloysite Al2Si2O5(OH)4 · 2H2O Mon. m
9.ED.15 Amesite Mg2Al(AlSiO5)(OH)4 Tric. 1 : _P_1
9.ED.15 Antigorite Mg3(Si2O5)(OH)4 Mon. m : B m
9.ED.15 Berthierine (Fe2+,Fe3+,Al)3(Si,Al)2O5(OH)4 Mon. m : B m
9.ED.15 Brindleyite (Ni,Al)3(Si,Al)2O5(OH)4 Mon.
9.ED.15 Caryopilite Mn2+3Si2O5(OH)4 Mon.
9.ED.15 Cronstedtite Fe2+2Fe3+((Si,Fe3+)2O5)(OH)4 Trig. 3_m_ : P_31_m
9.ED.15 Fraipontite (Zn,Al)3((Si,Al)2O5)(OH)4 Mon.
9.ED.15 Greenalite (Fe2+,Fe3+)2-3Si2O5(OH)4 Mon.
9.ED.15 Kellyite Mn2+2Al(AlSiO5)(OH)4 Hex. 6 : _P_63
9.ED.15 Lizardite Mg3(Si2O5)(OH)4 Trig. 3_m_ : P_31_m
9.ED.15 Manandonite Li2Al4(Si2AlB)O10(OH)8 Orth. 222 : _C_2221
9.ED.15 Népouite Ni3Si2O5(OH)4 Orth.
9.ED.15 Guidottiite Mn2Fe3+(Fe3+SiO5)(OH)4 Hex. 6 : _P_63
9.ED.15 va Chromoamesite Mg2(Al,Cr)(AlSiO5)(OH)4
9.ED.20 Allophane (Al2O3)(SiO2)1.3-2 · 2.5-3H2O Amor.
9.ED.20 Chrysocolla Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 Orth.
9.ED.20 Imogolite Al2SiO3(OH)4
9.ED.20 Neotocite (Mn,Fe,Mg)SiO3 · H2O Amor.
9.ED.25 Bismutoferrite Fe3+2Bi(SiO4)2(OH) Mon. m : B m
9.ED.25 Chapmanite Fe3+2Sb3+(Si2O5)O3(OH) Mon. m : B m
9.ED.30 Pianlinite Al2Si2O6(OH)2 Orth.

Other InformationHide

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Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

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References for PecoraiteHide

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Reference List:

Faust, G.T., Fahey, J.J., Mason, B., Dwornik, E.J. (1969) Pecoraite, Ni6Si4O10(OH)8, nickel analog of clinochrysotile, formed in the Wolf Creek meteorite. Science: 165: 59-60.

Faust, G.T., Fahey, J.J., Mason, B., Dwornik, E.J. (1969) Pecoraite, Ni6Si4O10(OH)8, nickel analog of clinochrysotile, formed in the Wolf Creek meteorite. Science: 165: 59-60.

Localities for PecoraiteHide

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This 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.

Locality ListHide

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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.

Australia
Tasmania Waratah-Wynyard municipality Heazlewood district ⓘ Lord Brassey Mine Bottrill et al. (2002)
Western Australia Coolgardie Shire Kambalda Kambalda Nickel mines Juan complex ⓘ Otter Shoot Nickel Mine Nickel et al. (1981)
Widgiemooltha ⓘ 132 North Ni Mine Nickel et al. (1993) +1 other reference
East Pilbara Shire Nullagine ⓘ Otway Ni deposit Nickel +2 other references
Halls Creek Shire Carranya Station ⓘ Wolfe Creek meteorite crater (TL) Faust et al. (1969) +2 other references
Menzies Shire Menangina Station ⓘ Carr Boyd Rocks Ni mine Nickel et al. (1981) +1 other reference
Canada
Québec Estrie Le Val-Saint-François RCM St-Denis-de-Brompton ⓘ Orford Nickel mine Gault et al. (1994)
Dominican Republic
Monseñor Nouel Province Bonao Falcondo Mines ⓘ Loma Peguera deposit M.E. Ciriotti (Steffen Moeckel analysis)
France
New Caledonia Northern Province Houaïlou ⓘ Poro Mine Berger +1 other reference
Pouembout ⓘ Népoui Mine Berger +1 other reference
Provence-Alpes-Côte d'Azur Alpes-Maritimes Nice Daluis ⓘ Roua Mines (Clue de Roua) Mandarino (2001)
Germany
Saxony Vogtlandkreis Limbach ⓘ Reimersgrün Quarry Tröger (2012)
Plauen Röttis ⓘ Hans Georg Mine Andreas Gerstenberg collection
Pöhl ⓘ Rentzschmühle Quarry M Adelt collection
Greece
Attica East Attica Lavreotiki Lavrion Mining District Km 3 Km 3 mines ⓘ Km 3 open pit Möckel (2000)
Italy
Liguria Genoa Ceranesi Livellato Case Lagoscuro ⓘ Lagoscuro mine Biagioni et al. (2020)
Lombardy Sondrio Province Lanzada Campo Moro Valley ⓘ Alpe Gera Bedognè et al. (1993)
Franscia ⓘ Dossi di Franscia ? Bedognè et al. (1993)
ⓘ Vallone del Cengiaccio (Cengiaccio; Cengiàsc; Cengiasco) Bedognè et al. (1993) +1 other reference
ⓘ Malenco Valley Lapis (10)
Torre di Santa Maria ⓘ Val Sora Quarry Guicciardi (1980)
Piedmont Verbano-Cusio-Ossola Province Villette ⓘ Pian dei Sali serpentinite (Monte Netto - Cresta della Colmine northwest slope) Boscardin et al. (2013)
Sardinia South Sardinia Province Nuxis Monte Tamara mining area ⓘ San Pietro Mine Lecca G.C. et al. (2022)
Tuscany Livorno Province Livorno ⓘ Botro del Diavolo Marco Bonifazi collection
Lucca Province Stazzema Pontestazzemese ⓘ Buca della Vena Mine Orlandi (2011)
Morocco
Drâa-Tafilalet Region Zagora Province Agdz Cercle Tansifte Caïdat ⓘ Aït Ahmane Färber (n.d.)
Russia
Chelyabinsk Oblast Verkhny Ufaley Ufaley District (Ufalei District) ⓘ Novocheremshanskiy Nickel Mine Berger +2 other references
ⓘ Sinar Nickel Mine Talovina et al. (2008)
ⓘ Ufalei Ni deposit Talovina et al. (2003)
Sverdlovsk Oblast Rezhevsky District Lipovsk pegmatite field ⓘ Lipovka Mine (Lipovskoe Mine; Lipovskaya Mine; Lipovaya Mine) Pavel.M. Kartashov (n.d.)
Serovsky District Serov Kola massif ⓘ Elov Mine Talovina et al. (2008)
ⓘ Ural Economic Region ...
South Africa
Mpumalanga Ehlanzeni District Municipality Mbombela Local Municipality Kaapschehoop ⓘ New Amianthus Mine Cairncross et al. (1995)
South Korea
Gyeonggi Province Gwacheon City ⓘ Buksite Song et al. (1995) +1 other reference
ⓘ Namsite Song et al. (1995)
Turkey
Manisa Province Turgutlu District ⓘ Çaldağ Mine Helvaci et al. (2013)
USA
Arizona Cochise County Turquoise Mining District (Courtland-Gleeson Mining District) ⓘ Barrett Camp ghost town Anthony et al. (1995)
California San Benito County Goat Mountain ⓘ Clear Creek claim Dunning et al. (2005)
Idria (New Idria) ⓘ New Idria Mine (New Idria group; New Hope vein)
Sonoma County West Mayacmas Mining District Cloverdale North Fork Little Sulphur Creek ⓘ Culver-Baer Mine Tim Greenland (2011)
Maryland Montgomery County Rockville ⓘ Hunting Hill Quarry Parker (2014)
Michigan Marquette County Ishpeming Greenstone belt (Marquette Greenstone belt) ⓘ Ropes Gold Mine Travis Olds collection
ⓘ Presque Isle George W. Robinson and S.M. Carlson (2009)
Missouri Jefferson County ⓘ Antire Road Quarry Sherwood et al. (1998)
ⓘ St. Louis County www.gswweb.org/minutes/GSW1980.htm
ⓘ St. Louis and Spergen limestones Sherwood et al. (1998)
New York Jefferson County Antwerp ⓘ Sterling Mine Robinson et al. (2007)
Oregon Douglas County Riddle Mining District Riddle ⓘ Riddle Mine ...
Vermont Orleans & Lamoille Cos. Lowell & Eden ⓘ Belvidere Mountain Quarries Rocks & Min. Vol. 71 (1996)