1) Phosphate mineral 
Cacoxenite is an iron aluminium phosphate mineral with formula: Fe3+24Al(PO4)17O6(OH)12·17(H2O). It is associated with iron ores. The name comes from the Greek κăκός for `bad` or `evil` and ξένος for `guest` because the phosphorus content of cacoxenite lessens the quality of iron smelted from ore containing it. It was first descri...
• (n.) A hydrous phosphate of iron occurring in yellow radiated tufts. The phosphorus seriously injures it as an iron ore.