miaskite

English

Alternative forms

miascite

Etymology

From Miask, an alternate name for Miass in the Urals, -ite.

Noun

miaskite (countable and uncountable, plural miaskites)

(mineralogy) A granitoid rock containing biotite and elaeolite, a kind of nepheline syenite.
- For quotations using this term, see Citations:miaskite.

Usage notes

Historically, at least two minerals were described under the names miascite, miaskite,^[1] and miassite, spellings which were at least sometimes interchanged.^[2]^[3] The most common spelling today is miaskite (followed by miascite),^[4] notwithstanding that the Russian locale is spelled Miass. Some sources consider miaskite/miascite and miassite to now refer to different minerals.^[5]

Derived terms

miaskitic

References

^ Journal of the Geological Society of Dublin, 1860, page 39:
In the supplementary part of his "Traité de Minéralogie," vol. iii., p. 770, Ed. 1845 , M. Dufrénoy has described, under the name of Miascite (Miaskite), two very distinct substances. The first is a grayish feldspathic rock, composed chiefly of feldspar, uniaxial mica, and elaeolite; [...] The name of Miaskite was given to this rock from its occurence in the hills in the neighbourhood of Miask in Siberia. The second substance described under the name Miaskite was also derived from the locality just named, whence it was sent to Mr. Adam. M. Dufrenoy examined it and considered it to be dolomite.
^ Mineralogical Abstracts, 1925, page 170: “... miassite [the author writes miascite] complex between Lake Ilmen on the south and the Miass and the Kyshtymsk estates on the north.”
^ 1897, Persifor Frazer, Geological Section from Moscow to Siberia and Return, page 436: "Miascite" (or Miasskite, or better Miassite or Biotite-nepheline Syenite) is found in many places in the Ilmens, of which the chief is near Lake Ilmen.
^ [1]
^ Klaus K. E. Neuendorf, American Geological Institute (2005) Glossary of Geology, Springer Science & Business Media, →ISBN, page 410:
miaskite (mi-as'-kite) (a) In the IUGS classification, a special term for a nepheline monzosyenite. (b) A biotite-bearing nepheline syenite containing oligoclase and microperthite. Its name, given by Rose in 1839, is derived from Miask, in the Urals. Also spelled: miascite. Obsolete. / miassite A metallic cubic mineral: Rh17S15. Syn: prassoite. It is the Rh analogue of palladseite.

[1] Journal of the Geological Society of Dublin, 1860, page 39:
In the supplementary part of his "Traité de Minéralogie," vol. iii., p. 770, Ed. 1845 , M. Dufrénoy has described, under the name of Miascite (Miaskite), two very distinct substances. The first is a grayish feldspathic rock, composed chiefly of feldspar, uniaxial mica, and elaeolite; [...] The name of Miaskite was given to this rock from its occurence in the hills in the neighbourhood of Miask in Siberia. The second substance described under the name Miaskite was also derived from the locality just named, whence it was sent to Mr. Adam. M. Dufrenoy examined it and considered it to be dolomite.

[2] Mineralogical Abstracts, 1925, page 170: “... miassite [the author writes miascite] complex between Lake Ilmen on the south and the Miass and the Kyshtymsk estates on the north.”

[3] 1897, Persifor Frazer, Geological Section from Moscow to Siberia and Return, page 436: "Miascite" (or Miasskite, or better Miassite or Biotite-nepheline Syenite) is found in many places in the Ilmens, of which the chief is near Lake Ilmen.

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[5] Klaus K. E. Neuendorf, American Geological Institute (2005) Glossary of Geology, Springer Science & Business Media, →ISBN, page 410:
miaskite (mi-as'-kite) (a) In the IUGS classification, a special term for a nepheline monzosyenite. (b) A biotite-bearing nepheline syenite containing oligoclase and microperthite. Its name, given by Rose in 1839, is derived from Miask, in the Urals. Also spelled: miascite. Obsolete. / miassite A metallic cubic mineral: Rh17S15. Syn: prassoite. It is the Rh analogue of palladseite.

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