allomerism

allomerism
noun
(chemistry) variability in chemical composition without variation in crystalline form
• Derivationally related forms: ↑allomerous
• Topics: ↑chemistry, ↑chemical science
• Hypernyms: ↑variation, ↑fluctuation

* * *

—allomerous, adj.
/euh lom"euh riz'euhm/, n. Chem.
variability in chemical constitution without change in crystalline form.
[1880-85; ALLO- + -MER + -ISM]

* * *

allomerism Chem.
(æˈlɒmərɪz(ə)m)
[mod. f. Gr. ἄλλος other, different + µέρ-ος part + -ism.]
A term applied by Cooke to the variation in chemical constitution without change of form, incident to those minerals that contain isomorphous constituents which may wholly or partially replace one other.
Allomerism is well shown in Amphibole; its typical composition is RO . SiO2 in which RO represents any two or more of the bases magnesia (MgO), lime (CaO), oxide of iron (FeO), oxide of manganese (MnO), soda (N2O), potash (K2O) or water (H2O); while the silica (SiO2) is usually partly replaced by alumina (Al2O3) and often by the isomorphous sesquioxide of iron (Fe2O3).

Useful english dictionary. 2012.

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Look at other dictionaries:

  • Allomerism — Al*lom er*ism, n. [Gr. ? other + ? part.] (Chem.) Variability in chemical constitution without variation in crystalline form. [1913 Webster] …   The Collaborative International Dictionary of English

  • Allomerism — is the similarity in the crystalline structure of substances of different chemical composition.References*Penguin Science Dictionary 1994, Penguin Books …   Wikipedia

  • allomerism — [ə läm′ər iz΄əm] n. [< ALLO + Gr meros, part (see MERIT) + ISM] variation in chemical composition without change in crystalline form allomerous [ə läm′ərəs] adj …   English World dictionary

  • allomerism — alomerizmas statusas T sritis chemija apibrėžtis Vienodo pavidalo kristalų susidarymas kristalizuojantis skirtingos cheminės sudėties junginiams. atitikmenys: angl. alloisomerism; allomerism rus. аллоизомеризм; аллоизомерия; алломеризм; алломерия …   Chemijos terminų aiškinamasis žodynas

  • allomerism — allomerous, adj. /euh lom euh riz euhm/, n. Chem. variability in chemical constitution without change in crystalline form. [1880 85; ALLO + MER + ISM] * * * …   Universalium

  • allomerism — The state of differing in chemical composition but having the same crystalline form. [allo + G. meros, part] * * * al·lom·er·ism (ə lomґər iz əm) [allo + merism] change of chemical constitution without change in the crystalline… …   Medical dictionary

  • allomerism — n. change in chemical structure …   English contemporary dictionary

  • allomerism — al·lom·er·ism …   English syllables

  • allomerism — al•lom•er•ism [[t]əˈlɒm əˌrɪz əm[/t]] n. chem. variability in chemical constitution without change in crystalline form • Etymology: 1880–85 al•lom′er•ous, adj …   From formal English to slang

  • allomerism — /əˈlɒmərɪzəm/ (say uh lomuhrizuhm) noun variability in chemical constitution without change in crystalline form. {allo + Greek meros part + ism} –allomerous, adjective …  

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