copper(I) oxide
chemical compound
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Summary
copper(I) oxide is a type of chemical entity[1]. It ranks in the top 5% of type of chemical entity entities by monthly Wikipedia readership (1,728 views/month).[2]
Key Facts
- Canonical SMILES: [O-2].[Cu+].[Cu+][3], O=[Cu].[Cu][4]
- Chemical formula: Cu₂O[5]
- Subclass of: copper oxide[6]
- Commons category: Copper(I) oxide[7]
- Color: red brown[8]
- Crystal system: cubic crystal system[9]
- Point group: cubic-hexoctahedral[10]
- Space group: space group Pn-3m[11]
- Refractive index: 2.85[12]
- Described by source: Meyers Konversations-Lexikon, 4th edition (1885–1890)[13]
- Density: 6.0[14]
- Molar fusion enthalpy: 64.22[15]
- Mass: 141.854[16], 141.85410962[17]
- Melting point: 1244[18]
- Boiling point: 2073.15[19]
- Decomposition point: 1800[20]
- Has part(s) of the class: oxygen[21], copper[22]
- Standard molar entropy: 129.96[23], 92.37[24]
- Standard enthalpy of formation: -112.0[25], -170.71[26]
- Safety classification and labelling: NFPA 704: Standard System for the Identification of the Hazards of Materials for Emergency Response[27]
Why It Matters
copper(I) oxide has Wikipedia articles in 26 language editions, a strong signal of global cultural recognition.[28] It is known by 56 alternative names across languages and contexts.[29]