原子簇(团簇) cluster c60 ◆ Roundest and most symmetrical molecule known to man ◆ Compressed- becomes stronger than diamond ◆ Third major form of pure carbon ◆ Heat resistance and ◆D=07nm electrical conductivity原子簇（团簇）cluster C60 Roundest and most symmetrical molecule known to man Compressed – becomes stronger than diamond Third major form of pure carbon Heat resistance and D＝0.7nm electrical conductivity