Formula: NaCa2(Fe,Mg)3(Fe,Al)2(Si5Al3)O22(OH)2
Origin of name: for Ryoichi Sadanaga, Japanese mineralogist
Crystal system: monoclinic
Crystal class: m, 2 or 2/m
Twinning:
Unit cell:
Colour: dark brown to black
Diaphaneity:
Luster: vitreous
Habit: crystals prismatic, to 1 mm
Hardness: 6
Specific gravity: 3.30
Cleavage: 1; {110} perfect
Tenacity:
Streak: pale brown
Synonyms/varieties:
Comments: series with magnesiosadanagaite
| 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 |