horn·blende (hôrn bl nd )n. A green to black amphibolic mineral, CaNa(Mg,Fe)4(Al,Fe,Ti)3Si6O22(OH,F)2, formed in the late stages of cooling in igneous rock. [German : Horn, horn (from Middle High German, from Old High German; see ker-1 in Indo-European roots) + Blende, blende; see blende.] |
hornblende [ˈhɔːnˌblɛnd]
n
(Earth Sciences / Minerals) a black or greenish-black mineral of the amphibole group, found in igneous and metamorphic rocks. Composition: calcium magnesium iron sodium aluminium aluminosilicate. General formula: (Ca,Na)2.3(Mg,Fe,Al)5Si6(Si,Al)2O22(OH)2
[from German Horn horn + blende]
hornblendic adj
| hornblende (hôrnblnd) A common, green to black mineral of the amphibole group. It has a variable composition and occurs in monoclinic crystals with a hexagonal cross-section, in fibrous forms, or in granular forms. Hornblende is found in many metamorphic and igneous rocks. Chemical formula: (Ca,Na)2-3(Mg,Fe,Al)5(Al,Si)8O22(OH)22. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. | hornblende - a green to black mineral of the amphibole group; consists of silicates of calcium and sodium and magnesium and iron amphibole - a mineral or mineral variety belonging to the amphibole group amphibole group - a group of minerals with similar crystal structures containing a silicate chain and combinations of chiefly sodium and calcium and magnesium and iron and aluminum |
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