Assertion: cordierite | /r/HasAspect | melting point of about 1460°c.
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Source sentences:
text: Cordierite is a crystalline material demonstrating relatively high refractoriness, having a melting point of about 1460°C., and, in a pure form, exhibits excellent electrical insulating properties and a relatively low coefficient of thermal expansion over the range up to 1000°C., viz., about 16 × 10-7 /°C.