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Allotropy

1911 Encyclopedia Britannica

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• Allotropy
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1911 Encyclopedia Britannica
• Allotropy
The Nuttall Encyclopedia
• Allotropy

(Gr. iiXXos, other, and Tpoiros, manner), a name applied by J. J. Berzelius to the property possessed by certain substances of existing in different modifications. Custom has to some extent restricted its use to inorganic chemistry; the corresponding property of organic compounds being generally termed isomerism. Conspicuous examples are afforded by oxygen, carbon, boron, silicon, phosphorus, mercuric oxide and iodide.