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About RF Cafe
Copyright: 1996 - 2024 Web BSEE - KB3UON RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling
2 MB. Its primary purpose was to provide me with ready access to commonly needed
formulas and reference material while performing my work as an RF system and circuit
design engineer. The World Wide Web (Internet) was largely an unknown entity at
the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps
while tying up your telephone line, and a nice lady's voice announced "You've Got
Mail" when a new message arrived... All trademarks, copyrights, patents, and other rights of ownership to images
and text used on the RF Cafe website are hereby acknowl My Hobby Website: |
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The Marvel That is Carbon
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The Marvel That is Carbon How can graphite and diamond be so different if they are both composed of pure carbon? A diamond is clear and hard and abrasive, while graphite is opaque and slippery. Diamond atoms are arranged as a tetrahedral, whereby each carbon attaches 3-dimensionally to three others. This accounts for its tremendous strength (diamond can scratch all other materials). In comparison, carbon atoms are arranged in layers with two kinds of bonds. Three are bonded with other carbon atoms at the corner of a hexagon, forming a 2-D chicken wire planar array. The layers then are held together weakly with the other bond. The third form of carbon, the Buckyball, was covered a while back in a Factoid, but don't expect to find one often in nature. While marveling at carbon, keep in mind that all living things are carbon-based. |
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