Английская Википедия:Gabronite

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Gabronite or Gabbronite is a former name for a mineral found in Norway, no longer widely used. It describes a form of scapolite or nepheline.

Current views

Mindat.org defines the term "Gabbronite" as:

Old discredited name, has been referred to as both Scapolite and Nepheline. [Clark, 1993, 249 - "Hey's Mineral Index - 3rd Edition"]Шаблон:Sfn

Wiktionary defines "Gabbronite" as "A compact variety of scapolite, resembling gabbro."

The term is sometimes used in modern geological descriptions. Thus a description of the Matamec Ecological Reserve in Quebec, Canada says, "Elsewhere, igneous rock is composed of anorthosite, gabronite and granite."Шаблон:Sfn

A web search is likely to show a polished mostly-black stone used in jewelry.

Descriptions

William Phillips (1773–1828) lists the mineral under SILEX, and describes it as follows:Шаблон:Sfn Шаблон:Blockquote

According to Parker Cleaveland (1780–1858) the mineral is probably a variety of Fettstein. Cleaveland defines it as follows:Шаблон:Sfn Шаблон:Blockquote

Webster's 1828 English Dictionary gives:

GA'BRONITE, n. A mineral, supposed to be a variety of fettstein. It occurs in masses, whose structure is more or less foliated, or sometimes compact. Its colors are gray, bluish or greenish gray, and sometimes red.Шаблон:Sfn

Armand Dufrénoy (1792–1857) describes the mineral as:Шаблон:Sfn

Gabronite. – This mineral, found only in Arendal in Norway, is found in an amorphous mass, with a compact or hard lamellar texture... The École des Mines possesses a sample in which I have been able to recognize not only that the angles are straight, but that there is a diagonal cleavage at an angle of about 135°; from which it follows that the prism is square, as in wernérite [common scapolite]: the shine of gabronite is fat and oily. Its color is dirty gray, greenish gray; it barely scratches glass: its specific gravity is 2.74. The composition of gabronite, which I will give in a few lines, departs from that of wernérite by the great quantity of soda it contains. This circumstance induced M. Beudant to associate it with nepheline; but the six-sided prism form of this latter species is opposed to this association.Шаблон:Sfn

See also

Notes

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Sources

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