Table 1 Single-crystal data and bulk modulus of PESIL ((SiO2)96(C2H4)34, space group Pnma).

From: High-pressure synthesis of a polyethylene/zeolite nano-composite material

Single crystal

T =293 K

T =150 K

Unit cell parameters, density and volume thermal expansion coefficient

 a (Å)

20.100 (2)

20.057 (17)

 b (Å)

20.071 (5)

19.995 (7)

 c (Å)

13.469 (1)

13.414 (3)

 V (Å3)

5,434 (2)

5,380 (4)

 Density (g cm−3)

2.054 (1); 2.648 for α-quartz

2.075 (2)

 Volume thermal expansion (K−1)

7 (1) × 10−5; 3.6 × 10−5 for α-quartz

 

Powder

Mechanical properties

 Bulk modulus (GPa)

26.7 (2.0); 37 for α-quartz

 
  1. Corresponding values for α-quartz are given35,41,42 for comparison. Structural data obtained from refinement of the structure of the single-crystal sample at ambient pressure and temperature are reported in Supplementary Tables S1 and S2.
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