Also known as 'Ajidamal', Amal was an attempt by the joint forces of the Tleilaxu and House Corrino to create a viable melange alternative. This was to be accomplished on Ix using the advanced facilities that already existed there, and the extenisve knowledge of genetic science that the Tleilaxu possesed.
Reasons for the project
For House Corrino this project was a means to gain the sort of power that it was felt the Emperor should have. Tired by the many factions that vied for power and threatened that of the Emperor, the plan was developed. If the plan was successful, the Emperor would have become the principal supplier of the spice melange, thus ending the monopoly enjoyed by planet Arrakis, and whichever Great House maintained the fief there.
The plan ultimately failed. However, some 1500 years after the death of Leto II, melange had come to be successfully fabricated off Arrakis (by this time known as Rakis) by The Bene Tleilax through their Axolotl Tanks. This fabricated Tlielaxu spice was still referred to simply as melange and not amal, since it was a pure replication of the spice from Arrakis and not derived from an alternative formula.