Axinite, HCa₃Al₂BS₄O₁₆

Axinite, HCa₃Al₂BS₄O₁₆, is also an aluminium borosilicate. It is a beautifully crystalline triclinic mineral (a:b:c = 0.4927:1:0.4511; α = 82°54', β = 88°9', γ = 131°33').