page_title: Covalent superconductor
section_title: Intercalated graphite
hierarchical_section_title: Covalent superconductor / Intercalated graphite
caption_attribution_description: English: Structure of Ca-intercalated graphite CaC6
context_page_description: Covalent superconductors are superconducting materials where the atoms are linked by covalent bonds. The first such material was boron-doped synthetic diamond grown by the high-pressure high-temperature method. The discovery had no practical importance, but surprised most scientists as superconductivity had not been observed in covalent semiconductors, including diamond and silicon.
context_section_description: When metal atoms are inserted (intercalated) between the graphite planes, several superconductors are created with the following transition temperatures:
caption: Structure of CaC6
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