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<table>Variation of molar volume and oxygen packing density with composition (the solid lines are guide to eye).</table>

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Figure 4

Figure 4: Spectroscopic and Physical Properties of <svg style="vertical-align:-4.67647pt;width:54.424999px;" id="M1" height="21.262501" version="1.1" viewBox="0 0 54.424999 21.262501" width="54.424999"  xmlns="http://www.w3.org/2000/svg">
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Figure 4 | Spectroscopic and Physical Properties of 
	
		
			
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Spectroscopic and Physical Properties of B i 2 O 3 - B 2 O 3 -ZnO- L i 2 O Glasses

Figure 4

Spectroscopic and Physical Properties of --ZnO- Glasses