Spectral Investigation of Crystalline (CuHPO₄, Cu₂P₄O_12, and Cu₂P₈O₂₂) and Glassy Copper Phosphates

Table 1

List of investigated samples.

Powders
1	CuHPO4	Copper(II) hydrogen phosphate
2	Cu2P4O12	Copper(II) metaphosphate
3	Cu2P8O22	Copper(II) ultraphosphate
Glasses
1	50 mol% CuO	Meta, rapidly cooled,; melted in open crucible
2	50 mol% CuO	Meta, slowly cooled,; melted in open crucible
3	17 mol% CuO + 1 mol% H2O	Ultra, slowly cooled,; melted in ampoule
4	50 mol% CuO	Meta, slowly cooled, melted in ampoule