Christmas Island Rock Phosphate (CIRP)

Christmas Island Rock Phosphate (CIRP) was formed by slow phosphatisation of the parent sedimentary and volcanic rocks over millions of years. The Island is made up of volcanic rocks interbedded with coral limestone, and has been subjected to several phases of uplifting, forming a central plateau at an elevation of 200-350 metres above sea level.

Christmas Island Rock Phosphate’s combination of fluorohydroxyapatite, calcium iron and aluminium phosphates make it a highly sought-after phosphate product, which provides benefits in a range of fertiliser manufacturing processes. Its relatively high total phosphorus oxide (P2O5) level improves the analysis of many straight and compound fertilisers, and its iron and aluminium content improves the granule strength of a range of acidulated fertilisers. In addition, its reactive characteristics provide advantages for compacted fertilisers that do not undergo chemical processes.

Additional Information