『Abstract
　A new classification and nomenclature scheme for the amphibole-supergroup minerals is described, based on the general formula AB2C5T8O22W2, where A = □, Na, K, Ca, Pb, Li; B = Na, Ca, Mn²⁺, Fe²⁺, Mg, Li; C = Mg, Fe²⁺, Mn²⁺, Al, Fe³⁺, Mn³⁺, Ti⁴⁺, Li; T = Si, Al, Ti⁴⁺, Be; W = (OH), F, Cl, O^2-. Distinct arrangements of formal charges at the sites (or groups of sites) in the amphibole structure warrant distinct root names, and are, by implication, distinct species; for a specific root name, different homovalent cations (e.g., Mg vs. Fe²⁺) or anions (e.g., OH vs. F) are indicated by prefixes (e.g., ferro-, fluoro-). The classification is based on the A, B, and C groups of cations and the W group of anions, as these groups show the maximum compositional variability in the amphibole structure. The amphibole supergroup is divided into two groups according to the dominant W species: ^W(OH,F,Cl)-dominant amphiboles and ^WO-dominant amphiboles (oxo-amphiboles). Amphiboles with (OH, F, Cl) dominant at W are divided into eight subgroups according to the dominant charge-arrangements and type of B-group cations: magnesium-iron-manganese amphiboles, calcium amphiboles, sodium-calcium amphiboles, sodium amphiboles, lithium amphiboles, sodium-(magnesium-iron-manganese) amphiboles, lithium-(magnesium-iron-manganese) amphiboles and lithium-calcium amphiboles. Within each of these subgroups, the A- and C-group cations are used to assign specific names to specific compositional ranges and root compositions. Root names are assigned to distinct arrangements of formal charges at the sites, and prefixes are assigned to describe homovalent variation in the dominant ion of the root composition. For amphiboles with O dominant at W, distinct root-compositions are currently known for four (calcium and sodium) amphiboles, and homovalent variation in the dominant cation is handled as for the ^W(OH,F,Cl)-dominant amphiboles. With this classification, we attempt to recognize the concerns of each constituent community interested in amphiboles and incorporate these into this classification scheme. Where such concerns conflict, we have attempted to act in accord with the more important concerns of each community.

Keywords: amphibole; nomenclature; classification; chemical composition; crystal chemistry』

Introduction
General statement
The new classification
Amphibole classification by chemical formula
Significant issues involved in the classification of amphiboles
　Root names
　Prefixes
　Adjectival modifiers
　Named amphiboles
　Synthetic amphiboles
　Other issues
The principal variables used in the classification procedure
A new scheme for the classification of amphiboles
Amphiboles with (OH, F, Cl) dominant at W
　The magnesium-iron-manganese amphiboles
　The calcium amphiboles
　The sodium-calcium amphiboles
　The sodium amphiboles
　The lithium amphiboles
　The sodium-(magnesium-iron-manganese) amphiboles
　The lithium-(magnesium-iron-manganese) amphiboles
　The lithium-calcium amphiboles
Amphibole with O^2- dominant at W
Coda
References cited
Appendix I: The C2/M amphibole structure
Appendix II: The role of Fe, H, and Li
Appendix III: Calculation of Fe³⁺ and (OH) in amphiboles
　Calculation of amphibole formulas and (OH) content
　Calculation of amphibole formulas and Fe³⁺ content
　General points
　Calculation procedures
Appendix IV: Principal variables used in the classification procedure
　The W anions
　Hydroxy-fluoro-chloro-amphibole group
　Problems with the previous amphibole classification
　　(1) The role of ^BLi
　　(2) The names of the principal subgroups
　The new classification
　　(1) The role of the sodium-calcium, lithium-calcium, sodium-(magnesium-iron-manganese), and lithium-(magnesium-iron-manganese) subgroups
　　(2) Lithium-calcium, sodium-(magnesium-iron-manganese), and lithium-(magnesium-iron-manganese) subgroups
　　(3) The A cations
　　(4) The C cations
Appendix V: Major differences between the new classification and IMA1997 and IMA2003
Appendix VII: Symbols and amphiboles