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SiO₂	>69%
Al₂O₃	15-23%
SiO₂+ Al₂O₃	>92%
Fe₂O₃	<1.0%
CaO	<0.25%
MgO	<2%
K₂O+Na₂O	2-4%
��	<1%

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�@��	Vol%	1
�ȟ�	KJ/Kg	840-900
��鏊(qi��ng)��	N/mm²	390-420
�w�e�ܶ�	g/cm³	2.3-2.45
��	%	99.98
��G�ض�	��	1280 to 1320
ܛ��ض�	��	>1400
��ˮ��	%	<0.2
��Ûϵ��(sh��)	10^-6mm/mm��	4.7
Ӳ��	Mohr Scale	7-8
��(qi��ng)��	Newtons	5600
��_��(qi��ng)��	Kgf.cm/cm²	1.0-1.5

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�ߴ�	��		�ȱ��e		��϶�ʣ�%��	��ӣ�m^-1��
�ߴ�	1b/ft³	Kg/m³	ft²/ft³	m²/m³	��϶�ʣ�%��	��ӣ�m^-1��
1"	40	645	79.5	260	77	570
1-1/2 "	37.5	600	64	210	78	430
2"	35.6	570	42.8	140	79	277
3"	36	580	32	105	77	206

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