Formula: Na(Ca,Mg)2Fe6(PO4)2(PMo11O39)(OH,Cl)10 . 33H2O
Origin of name: For H. Mendoza Avila, Mexican geologist
Crystal system: Monoclinic or triclinic
Crystal class: Unknown
Twinning:
Unit cell:
Colour: Yellow
Diaphaneity:
Luster: Vitreous
Habit: Crystals, euhedral to 30 µm
Hardness: 1.5
Specific gravity: 3.85
Cleavage: None
Tenacity:
Streak: Yellow
Synonyms/varieties:
Comments: Readily soluble in acids (dilute at room temperature)
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