pentlandite

pentlandite

pentlandite An iron and nickel sulphide, with the formula (FeNi)9S8, and the main ore mineral for nickel; sp. gr. 4.5–5.0; hardness 3–4; cubic; light bronze-yellow; greenish-black streak; metallic lustre; very rarely found in well-formed crystals, usually occurring as irregular grains and inclusions; no cleavage, parting {111}; occurs with the other sulphide ores genetically associated with basic and ultrabasic rocks, together with pyrrhotine and chalcopyrite.

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AILSA ALLABY and MICHAEL ALLABY. "pentlandite." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "pentlandite." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O13-pentlandite.html

AILSA ALLABY and MICHAEL ALLABY. "pentlandite." A Dictionary of Earth Sciences. 1999. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-pentlandite.html

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Pentland Firth

Pentland Firth , channel, 6 to 8 mi (9.7–12.9 km) wide and c.14 mi (23 km) long, N Scotland. Connecting the North Sea with the Atlantic Ocean, it separates the Scottish mainland from the Orkney Islands . Its rough waters have proven dangerous to small vessels. Small islands dot the Pentland Firth.

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"Pentland Firth." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>.

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pentlandite

pentlandite , yellowish-bronze, opaque mineral, a sulfide of iron and nickel, (Fe,Ni) 9 S 8 . It is found in masses nearly always associated with the iron sulfide pyrrhotite. The largest deposit of this important ore of nickel is at Sudbury, Ont. Important deposits are mined in Manitoba, Russia, and W Australia.

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Pentland Firth

Pentland Firth, Scotland/UK Pettaland fjorthr ‘Strait at the north end of the Land of the Picts’ from the Old Scandinavian Pett ‘Pict’, land, and fjọrthr ‘strait’ or ‘inlet’.

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JOHN EVERETT-HEATH. "Pentland Firth." Concise Dictionary of World Place-Names. 2005. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>.

JOHN EVERETT-HEATH. "Pentland Firth." Concise Dictionary of World Place-Names. 2005. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O209-PentlandFirth.html

JOHN EVERETT-HEATH. "Pentland Firth." Concise Dictionary of World Place-Names. 2005. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O209-PentlandFirth.html

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Pentland Firth

Pentland Firth Highland, Orkn. Pettaland fjorthr c.1085. ‘Sea inlet in the land of the Picts’. OScand. Pett + land + fjǫrthr.

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A. D. MILLS. "Pentland Firth." A Dictionary of British Place-Names. 2003. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>.

A. D. MILLS. "Pentland Firth." A Dictionary of British Place-Names. 2003. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O40-PentlandFirth.html

A. D. MILLS. "Pentland Firth." A Dictionary of British Place-Names. 2003. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O40-PentlandFirth.html

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Free newspaper and magazine articles

Plastic kills Firth birds.(News)
Newspaper article from: Sunday Mail (Glasgow, Scotland); 1/9/2005
'Crown jewel' tidal farm to go ahead; BILLION PROJECT OFF COAST OF SCOTLAND...
Newspaper article from: The Mail on Sunday (London, England); 10/31/2010
Rescue axe 'will risk lives'.(News)
Newspaper article from: The Mirror (London, England); 8/13/1999

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