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Amphibole supergroup [abbr. Amp ]

Year of discovery: 1889 (Japan)

Locality list: 925 localities of amphibole

[A][B₂][C₅][ X₂ |(T₄O₁₁)₂]

A: [ 2+: Ca, Pb ][ 1+: Na, K, Li ][ 0: [] ]

B: [ 2+: Ca, Mg, Fe, Mn ][ 1+: Na, Li ]

C: [ 4+: Ti, Zr ][ 3+: Al, Fe, Mn, Cr, V, Sc ][ 2+: Mg, Fe, Mn, Zn, Ni, Co ][ 1+: Li ]

T: [ 4+: Si, Ti ][ 3+: Al, Be ]

X: [ 2-: O ][ 1-: OH, F, Cl ]

• [ X ]
• [ (OH, F, Cl)^- ]: w(OH-F-Cl)-dominant amphibole group
• [ O^2- ]: w(O)-dominant amphibole group (Oxo-amphibole group)

• Class: Inosilicate subclass < Silicate class
• Class: Inosilicate
• System: Monoclinic, Orthorhombic

• Names of (Mg,Al) end-member amphiboles are used as root names but Hastingsite (Fe,Al end-member), Arfvedsonite (Fe,Fe end-member), and Riebeckite (Fe,Al end-member) are exceptional examples used as a root name.
• Katophorite, Taramite, and Sadanagaite have been defined as (Fe,Al) end-member amphiboles before 2012 but they were redefined as (Mg,Al) end-member amphiboles.