Graphene smaller amplitude and higher frequency. This phenomenon, named "membrane effect", was predicted by Lifshitz in 1952. A prediction that was published in 2015 suggested a melting point of ≈4125 K. Recent and more sophisticated modelling has increased this temperature to at least 5000 K. At 6000 K (the sun's surface having an effective temperature of 5,777 K) graphene melts into an agglomeration of loosely coupled doubled bonded chains, before becoming a gas. The carbon–carbon bond length in graphene is about 0.142 nanometers. Graphene sheets stack to form graphite with an interplanar spacing of . Graphene is the strongest material ever
Just Between the Two of Us Haggard hits like "Sing Me Back Home" and "Branded Man". "Just Between the Two of Us" hit number 4 on the country albums chart. In a retrospective review by Mark Deming for AllMusic, Deming wrote that the album is for "Haggard completists" and notes, "while Bonnie Owens was a good honky tonk singer, she was hardly a great one like Haggard, who seems to be holding himself back a bit musically as he defers to his spouse." Just Between the Two of Us Just Between the Two of Us is a duet album by country singers Merle Haggard and Bonnie