Lithium-(Magnesium-Iron-Manganese) Amphibole Subgroup
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Formula:
A(LiM)(C5)(T8O22)W2
The lithium-(magnesium-iron-manganese) amphibole subgroup is one of the subgroups belonging to the W(OH,F,Cl) amphibole group. It is defined with Li and either Mg,Fe2+ or Mn2+ (represented as M in the general formula) as the dominant elements in the B position.
The IMA-CNMNC definition is 0.75 >B(Ca + ΣM2+)/ΣB > 0.25, BΣM2+/ΣB > BΣCa/ΣB and
0.75 > B(Na + Li)/ΣB > 0.25, BLi/ΣB > BNa/ΣB.)
BΣM refers to BΣ(Mg,Mn,Fe)
The lithium-(magnesium-iron-manganese) amphibole subgroup is further divided into root-name groups based on Mg, Fe or Mn dominance in the B position and the valence distribution in the A, C and T positions.
The IMA-CNMNC definition is 0.75 >B(Ca + ΣM2+)/ΣB > 0.25, BΣM2+/ΣB > BΣCa/ΣB and
0.75 > B(Na + Li)/ΣB > 0.25, BLi/ΣB > BNa/ΣB.)
BΣM refers to BΣ(Mg,Mn,Fe)
The lithium-(magnesium-iron-manganese) amphibole subgroup is further divided into root-name groups based on Mg, Fe or Mn dominance in the B position and the valence distribution in the A, C and T positions.
Name:
The lithium-(magnesium-iron-manganese) amphibole subgroup was defined in the 2012 amphibole nomenclature.
This page provides mineralogical data about Lithium-(Magnesium-Iron-Manganese) Amphibole Subgroup.
Unique Identifiers
Mindat ID:
43532
Long-form identifier:
mindat:1:1:43532:7
IMA Classification of Lithium-(Magnesium-Iron-Manganese) Amphibole Subgroup
IMA status notes:
Intermediate member of a solid-solution series
Chemistry of Lithium-(Magnesium-Iron-Manganese) Amphibole Subgroup
Mindat Formula:
A(LiM)(C5)(T8O22)W2
The lithium-(magnesium-iron-manganese) amphibole subgroup is one of the subgroups belonging to the W(OH,F,Cl) amphibole group. It is defined with Li and either Mg,Fe2+ or Mn2+ (represented as M in the general formula) as the dominant elements in the B position.
The IMA-CNMNC definition is 0.75 >B(Ca + ΣM2+)/ΣB > 0.25, BΣM2+/ΣB > BΣCa/ΣB and
0.75 > B(Na + Li)/ΣB > 0.25, BLi/ΣB > BNa/ΣB.)
BΣM refers to BΣ(Mg,Mn,Fe)
The lithium-(magnesium-iron-manganese) amphibole subgroup is further divided into root-name groups based on Mg, Fe or Mn dominance in the B position and the valence distribution in the A, C and T positions.
The lithium-(magnesium-iron-manganese) amphibole subgroup is one of the subgroups belonging to the W(OH,F,Cl) amphibole group. It is defined with Li and either Mg,Fe2+ or Mn2+ (represented as M in the general formula) as the dominant elements in the B position.
The IMA-CNMNC definition is 0.75 >B(Ca + ΣM2+)/ΣB > 0.25, BΣM2+/ΣB > BΣCa/ΣB and
0.75 > B(Na + Li)/ΣB > 0.25, BLi/ΣB > BNa/ΣB.)
BΣM refers to BΣ(Mg,Mn,Fe)
The lithium-(magnesium-iron-manganese) amphibole subgroup is further divided into root-name groups based on Mg, Fe or Mn dominance in the B position and the valence distribution in the A, C and T positions.
Relationship of Lithium-(Magnesium-Iron-Manganese) Amphibole Subgroup to other Species
Other Members of w(OH,F,Cl)-dominant Amphibole Group:
| Calcium Amphibole Subgroup | AnCa2(C2+5-mC3+m)(Si8-(n+m)Al(n+m))W2 | |
| Lithium Amphibole Subgroup | AnLi2(C2+3+n-2mC3+2-n+mLim)(Si8O22)W2 | |
| 'Lithium-Calcium Amphibole Subgroup' | A(LiCa)(C5)(T8O22)W2 | |
| Magnesium-iron-manganese Amphibole Subgroup | An(B2)(C2+5-mC3+m)(Si8-(n+m)Al(n+m)O22(OH)2 | |
| Sodium Amphibole Subgroup | A0-1Na2(C2+2-4C3+1-2Li0-1)Σ5(Si8-mAlmO22)(OH,F,Cl)2 | |
| Sodium-(Magnesium-Iron-Manganese) Amphibole Subgroup | A(NaM)(C2+4-5C3+0-1)(Si8O22)W2 | |
| Sodium-Calcium Amphibole Subgroup | An(NaCa)(C2+5-mC3+m)(Si8-(n+m+1)Al(n+m-1)O22)V2 |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Lithium-(Magnesium-Iron-Manganese) Amphibole Subgroup
mindat.org URL:
https://www.mindat.org/min-43532.html
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