AMORPHOUS SILICATES (MINERALOGY)
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BTOTHER SILICATES (MINERALOGY)
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UDC549.691
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Descriptor GERAMORPHE SILIKATE (MINERALOGIE)
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Descriptor ENGAMORPHOUS SILICATES (MINERALOGY)
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Descriptor FRESILICATES AMORPHES (MINÉRALOGIE)
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NTSILICATES, ANHYDROUS AMORPHOUS + GLAS, NATURAL + TEKTITES (MINERALOGY)
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NTHYDRATED AMORPHOUS SILICATES (MINERALOGY)