scapolite

scapolite
/skap"euh luyt'/, n.
1. any of a group of minerals of variable composition, essentially silicates of aluminum, calcium, and sodium, occurring as massive aggregates or tetragonal crystals.
2. the member of the scapolite group intermediate in composition between meionite and marialite; wernerite.
[1795-1805; < G Skapolith. See SCAPE, -O-, -LITE]

* * *

      any of a group of feldspathoid minerals found in calcium-rich metamorphic rocks, particularly marble, gneiss, granulite, greenschist, and skarns. Principal occurrences are Quebec and Ontario, Canada; Kiruna, Swed.; Pennsylvania, United States; and Queensland, Australia. These minerals form a solid-solution (chemical-replacement) series in which sodium and calcium replace each other in the molecular structure. Marialite, a sodium aluminosilicate, and meionite, a calcium aluminosilicate, are the theoretical end-members (pure compounds); they have been synthesized but occur in nature only with at least 20 percent substitution of one for the other. Wernerite (the former group name) has been used for members of intermediate composition between marialite and meionite. For chemical formulae and detailed physical properties, see feldspathoid (table) (feldspathoid).

* * *


Universalium. 2010.

Игры ⚽ Нужна курсовая?

Look at other dictionaries:

  • Scapolite — (Gr. asairos , rod, stone), is a group of rock forming silicate minerals composed of aluminium, calcium and sodium silicate with chlorine, carbonate and sulfate. The variations in composition of the different members of the group may be expressed …   Wikipedia

  • Scapolite — Scap o*lite (sk[a^]p [ o]*l[imac]t), n. [Gr. ? a staff, or L. scapus a stem, stalk + lite: cf. F. scapolite.] (Mon.) A grayish white mineral occuring in tetragonal crystals and in cleavable masses. It is essentially a silicate of alumina and soda …   The Collaborative International Dictionary of English

  • scapolite — ● scapolite nom féminin (latin scapus, tige) Synonyme de wernérite. ● scapolite (synonymes) nom féminin (latin scapus, tige) Synonymes : wernérite ⇒SCAPOLITE, subst. fém. MINÉR. Pierre fine de couleur jaune, rose, mauve ou bleue. Synon. wernérite …   Encyclopédie Universelle

  • Scapolite — Catégorie IX : silicates[1] Wernerite de Madagascar …   Wikipédia en Français

  • scapolite — [skap′ə līt΄] n. [< Gr skāpos, rod (see SHAFT) + LITE] any of a group of tetragonal minerals composed chiefly of silicates of aluminum, calcium, and sodium …   English World dictionary

  • scapolite — ˈskapəˌlīt noun ( s) Etymology: French, from Latin scapus shaft + French o + lite; from the prismatic shape of its crystals 1. : a mineral of the scapolite group that is intermediate in composition between meionite and marialite, contains 46 to… …   Useful english dictionary

  • scapolite — noun Etymology: French, from Latin scapus shaft + French o + lite; from the prismatic shape of its crystals Date: 1802 any of a group of minerals that are essentially complex silicates of aluminum, calcium, and sodium and that include some used… …   New Collegiate Dictionary

  • scapolite — noun Any of several mixed sodium and calcium aluminosilicates which also contain chloride, carbonate and sulfate and are found in metamorphic rocks …   Wiktionary

  • scapolite — (ska po li t ) s. f. Synonyme de wernérite. ÉTYMOLOGIE    Ital. scappino, escarpin (voy. ce mot) …   Dictionnaire de la Langue Française d'Émile Littré

  • scapolite — sca·po·lì·te s.f. TS mineral. minerale di colore giallo scuro costituito da alluminosilicati di sodio e calcio, che si trova in rocce metamorfiche calcaree {{line}} {{/line}} DATA: av. 1840. ETIMO: comp. del gr. skápos ramo e di 1 lite …   Dizionario italiano

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”