| Doyleite | |
|---|---|
 | |
| General | |
| Category | Mineral |
| Formula (repeating unit) | Al(OH)3 |
| IMA symbol | Doy[1] |
| Strunz classification | 4.FE.10 |
| Dana classification | 6.3.4.1 |
| Crystal system | Triclinic |
| Space group | P1 or P1 |
| Unit cell | 104.37 |
| Identification | |
| Formula mass | 78 |
| Color | White, creamy-white, bluish-white |
| Cleavage | Perfect on {010} Distinct on {100} |
| Mohs scale hardness | 2.5 - 3 |
| Luster | Vitreous |
| Streak | White |
| Optical properties | Biaxial (+) |
| Refractive index | nα = 1.545 nβ = 1.553 nγ = 1.566 |
| Birefringence | 0.021 |
| 2V angle | Measured: 77° Calculated: 78° |
| Dispersion | None |
Doyleite is a rare aluminum trihydroxide mineral named in honor of its discoverer, the Canadian physician Earl Joseph (Jess) Doyle. It was first definitively described in 1985 (although a partial description was published in 1979)[2] and it is approved by the IMA.[3] It was described from Mont Saint-Hilaire, where it is extremely rare.[4]
- ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- ^ Joseph Anthony, Mandarino; Violet, Anderson (31 March 1989). Monteregian Treasures: The Minerals of Mont Saint-Hilaire, Quebec. CUP Archive. ISBN 9780521326322.
- ^ "Doyleite". www.mindat.org. Retrieved 2021-10-25.
- ^ "Doyleite (TL)". Saint-Hilaire. Retrieved 2021-11-15.