What is Al2Se5? Important knowledge about Al2Se5.

1. Definition of Al₂Se₅
   1.1 Name: The chemical compound Al₂Se₅ is called Aluminium Selenide in English.
   1.2 Atomic composition: The compound Al₂Se₅ consists of 2 Aluminium atoms and 5 Selenium atoms, so the atomic mass will be the sum of these.
   1.3 Atomic mass: The atomic mass of Al₂Se₅ can be calculated by taking the atomic mass of Aluminium multiplied by 2, plus the atomic mass of Selenium multiplied by 5.
   1.4 Ion structure: In the compound Al₂Se₅, Al carries a positive ion and Se carries a negative ion in their composition.

2. Properties of Al₂Se₅
   2.1 Physical properties: Al₂Se₅ is solid at room temperature, with an unclear color. This compound does not have a characteristic smell.
   2.2 Chemical properties: Al₂Se₅ typically does not react with strong acids and has oxidative properties.

3. Common chemical equations with Al₂Se₅: Unclear.

4. Synthesis of Al₂Se₅
   4.1 Laboratory synthesis: The compound Al₂Se₅ is synthesized through the reaction of Aluminum with Selenium at high temperatures.
   4.2 Industrial synthesis: Unclear.

Note: The above information is mainly for reference, there may be many other properties and applications of Al₂Se₅.