| Crandallite | |
| Category: | Phosphate minerals |
| Imasymbol: | Cdl[1] |
| Molweight: | 414.02 |
| Strunz: | 8.BL.10 |
| Dana: | 42.07.03.01 |
| System: | Trigonal |
| Unit Cell: | a = 7.005, c = 16.192, Z = 3; V = 688.09 |
| Colour: | grey; yellowish |
| Habit: | fibrous, compact or massive |
| Cleavage: | perfect 0001 |
| Mohs: | 4 |
| Luster: | vitreous to dull |
| Streak: | white |
| Density: | 2.84 |
| Refractive: | w = 1.618, e = 1.623 |
| Birefringence: | 0.0050 |
| References: | [2] |
Crandallite is a calcium aluminium basic phosphate mineral. It has ideal formula . Crandallite was named after Milan L. Crandall, Jr, who worked for Knight Syndicate.This mineral is found in laterite and in alteration products of phosphate rich pegmatites.