British and Irish Physical Geography

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pentlandite

A Dictionary of Earth Sciences | 1999 | | Copyright

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

The Columbia Encyclopedia, 6th ed. | 2011 | Copyright

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. (June 1, 2012). http://www.encyclopedia.com/doc/1E1-Pentland.html

"Pentland Firth." The Columbia Encyclopedia, 6th ed.. 2011. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-Pentland.html

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pentlandite

The Columbia Encyclopedia, 6th ed. | 2011 | Copyright

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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"pentlandite." The Columbia Encyclopedia, 6th ed.. 2011. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-pentland.html

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Pentland Firth

Concise Dictionary of World Place-Names | 2005 | | Copyright

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

A Dictionary of British Place-Names | 2003 | | Copyright

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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