Formula: KFe7(PO4)5(OH)7 . 8H2O
Origin of name: For Sir John Meurig Thomas, British chemist
Crystal system: Monoclinic
Crystal class: Unknown
Twinning:
Unit cell:
Colour: Creamy white, pale yellow
Diaphaneity:
Luster: Vitreous to waxy spheres, silky fibres
Habit: Elongate tabular crystals forming spheres and hemispheres to 80 µm, and drusy coatings
Hardness: 3
Specific gravity: 2.96
Cleavage: 1; {001} perfect
Tenacity:
Streak: Pale yellow to cream
Synonyms/varieties:
Comments:
| Back to Alphabetical list | Colour photos | Thin sections | SEM images | TEM images | vibrational spectra description | IR spectra | Raman spectra | N-IR spectra | F-IR spectra | IES spectra |