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Calcium Amphibole Subgroup

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About Calcium Amphibole SubgroupHide

Formula:
An(Ca2)(Z2+5-mZ3+m)(Si8-(n+m)Al(n+m))(OH,F,Cl)2
The calcium amphibole subgroup is one of the subgroups belonging to the W(OH,F,Cl)amphibole group. It is defined by Ca>1,5 apfu in the X position (= IMA B position). The calcium amphibole subgroup are further divided into root-name groups that are defined by the value of n and m (edenite and tschermakite substitutions) in the generic formula above. The generic formula does not apply fully to root-name groups or species containing elements with other valence values than standard. The various positions in the formula can have the following content:

A position: x=0 or 1, when 1, it normally contains a single valence element,most often Na or K but also Ca or Pb.
Z2+ position (= IMA C2+ position): m may be 0,1 or 2. The Z2+ positions normally contains Mg or Fe as the dominant elements.
Z3+ position (= IMA C3+ position): Normally contains Al or Fe, but also Cr or Ti are known as the dominant elements in this position.

On mindat.org we avoid using variables with the same symbol as elements and deviate from the IMA nomenclaure in that we use X rather than B, Z rather than C and (OH,F,Cl,O) rather than W.
This page provides mineralogical data about Calcium Amphibole Subgroup.


Chemical Properties of Calcium Amphibole SubgroupHide

Formula:
An(Ca2)(Z2+5-mZ3+m)(Si8-(n+m)Al(n+m))(OH,F,Cl)2

The calcium amphibole subgroup is one of the subgroups belonging to the W(OH,F,Cl)amphibole group. It is defined by Ca>1,5 apfu in the X position (= IMA B position). The calcium amphibole subgroup are further divided into root-name groups that are defined by the value of n and m (edenite and tschermakite substitutions) in the generic formula above. The generic formula does not apply fully to root-name groups or species containing elements with other valence values than standard. The various positions in the formula can have the following content:

A position: x=0 or 1, when 1, it normally contains a single valence element,most often Na or K but also Ca or Pb.
Z2+ position (= IMA C2+ position): m may be 0,1 or 2. The Z2+ positions normally contains Mg or Fe as the dominant elements.
Z3+ position (= IMA C3+ position): Normally contains Al or Fe, but also Cr or Ti are known as the dominant elements in this position.

On mindat.org we avoid using variables with the same symbol as elements and deviate from the IMA nomenclaure in that we use X rather than B, Z rather than C and (OH,F,Cl,O) rather than W.

Other Language Names for Calcium Amphibole SubgroupHide

Simplified Chinese:钙角闪石

Relationship of Calcium Amphibole Subgroup to other SpeciesHide

Other Members of this group:
Fluor-hornblende(◻/Na,K)Ca2({Fe2+/Mg}4{Fe3+/Mg})(AlSi7O22)F2
Lithium Amphibole SubgroupAn(Li2)(Z2+3+n-2mZ3+2-n+mLim)(Si8O22)(OH,F,Cl)2
Lithium-(Magnesium-Iron-Manganese) Amphibole Subgroup{A}{Li(Mg,Fe,Mn)}{Z5}{T8O22}(OH,F,Cl)2
Lithium-Calcium Amphibole Subgroup{A}{LiCa}{Z5}{T8O22}(OH,F,Cl)2
Magnesium-iron-manganese Amphibole SubgroupAn(X2)(Z2+5-mZ3+m)(Si8-(n+m)Al(n+m)O22(OH)2
Sodium Amphibole SubgroupAn(Na2)(Z5)(Si8-mAlmO22)(OH,F,Cl)2
Sodium-(Magnesium-Iron-Manganese) Amphibole Subgroup{A}{Na(Mg,Fe,Mn)}{Z5}{T8O22}(OH,F,Cl)2
Sodium-Calcium Amphibole SubgroupAn(NaCa)(Z2+5-mZ3+m)(Si8-(n+m+1)Al(n+m-1)O22)(OH,F,Cl)2
Group Members:
Cannilloite Root Name Ca(Ca2)(Z2+4Z3+))(Al3Si5O22)(OH,F,Cl)2
  Cannilloite Ca(Ca2)(Mg4Al)(Al3Si5O22)(OH)2Mon.
  Ferri-cannilloite Ca(Ca2)(Mg4Fe3+)(Al3Si5O22)(OH)2
  Ferri-fluoro-cannilloite (Ca)(Ca2){Mg4Fe3+}(Al3Si5O22)F2
  Ferro-cannilloite Ca(Ca2)(Fe2+4Al)(Al3Si5O22)(OH)2
  Ferro-ferri-cannilloite Ca(Ca2)(Fe2+4Fe3+)(Al3Si5O22)(OH)2
  Ferro-ferri-fluoro-cannilloite {Ca}{Ca2}{Fe2+4Fe3+}(Al3Si5O22)F2
  Ferro-fluoro-cannilloite {Ca}{Ca2}{Fe2+4Al}(Al3Si5O22)F2
  Fluoro-cannilloite {Ca}{Ca2}{Mg4Al}(Al3Si5O22)(F,OH)2Mon.
Edenite Root Name A(Ca2)Z5(AlSi7O22)((OH,F,Cl)2Mon.
  Edenite {Na}{Ca2}{Mg5}(AlSi7O22)(OH)2Mon.
  Ferro-edenite {Na}{Ca2}{Fe2+5}(AlSi7O22)(OH)2Mon.
  Ferro-fluoro-edenite {Na}{Ca2}{Fe2+5}(AlSi7O22)F2
  Fluoro-edenite {Na}{Ca2}{Mg5}(AlSi7O22)(F,OH)2Mon. 2/m : P2/m
  Potassic-ferro-chloro-edenite {K}{Ca2}{Fe2+5}(AlSi7O22)(Cl,OH)2
Hastingsite Root Name (A)(Ca2){Z2+4 Fe3+)(Al2Si6O22)(OH,F,Cl)2
  Fluoro-hastingsite {Na}{Ca2}{Fe2+4Fe3+}(Al2Si6O22)F2
  Hastingsite {Na}{Ca2}{Fe2+4Fe3+}(Al2Si6O22)(OH)2Mon.
  Magnesio-fluoro-hastingsite {Na}{Ca2}{Mg4Fe3+}(Al2Si6O22)F2Mon. 2/m : B2/m
  Magnesio-hastingsite {Na}{Ca2}{Mg4Fe3+}(Al2Si6O22)(OH)2Mon.
  Potassic-chloro-hastingsite {K}{Ca2}{Fe2+4Fe3+}(Al2Si6O22)(Cl,OH)2Mon. 2/m : B2/m
  Potassic-fluoro-hastingsite {K}{Ca2}{Fe2+4Fe3+}(Al2Si6O22)(F,OH)2Mon. 2/m : B2/m
  Potassic-hastingsite {K}{Ca2}{Fe2+4Fe3+}(Al2Si6O22)(OH)2Mon. 2/m : B2/m
  Potassic-magnesio-hastingsite {K}{Ca2}{Mg4Fe3+}(Al2Si6O22)(OH)2Mon. 2/m : B2/m
Hornblende Root Name ☐(Ca2)(Z2+4Z3+}(AlSi7O22)(OH,F,Cl)2Mon.
  Ferro-ferri-fluoro-hornblende ☐{Ca2}{Fe2+4Fe3+}(AlSi7O22)F2
  Ferro-ferri-hornblende ☐Ca2(Fe2+4Fe3+)(AlSi7O22)(OH)2Mon. 2/m : B2/m
  Ferro-fluoro-hornblende ☐Ca2(Fe2+4Al)(AlSi7O22)F2
  Ferro-hornblende ☐{Ca2}{Fe2+4Al}(AlSi7O22)(OH)2Mon.
  Magnesio-ferri-fluoro-hornblende ☐{Ca2}{Mg4Fe3+}(AlSi7O22)F2Mon. 2/m : B2/m
  Magnesio-ferri-hornblende ☐{Ca2}{Mg4Fe3+}(AlSi7O22)(OH)2Mon. 2/m : B2/m
  Magnesio-fluoro-hornblende (Na,K)1-xCa2Mg5(Si7Al)O22F2
  Magnesio-hornblende ☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2Mon.
Joesmithite {Pb}{Ca2}{Mg3Fe3+2}(Be2Si6O22)(OH)2Mon.
Pargasite Root Name (A)(Ca2){Z2+4 Al)(Al2Si6O22)(OH,F,Cl)2
  Chromio-pargasite {Na}{Ca2}{Mg4Cr3+}(Al2Si6O22)(OH)2Mon. 2/m : B2/m
  Ferro-chloro-pargasite NaCa2(Fe2+4Al)(Al2Si6O22)Cl2
  Ferro-fluoro-pargasite (Na)(Ca2)(Fe2+4Al)(Al2Si6O22)F2
  Ferro-pargasite {Na}{Ca2}{Fe2+4Al}(Al2Si6O22)(OH)2Mon.
  Fluoro-pargasite {Na}{Ca2}{Mg4Al}(Al2Si6O22)(F,OH)2Mon. 2/m : B2/m
  Pargasite {Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2Mon.
  Potassic-chloro-pargasite {K}{Ca2}{Mg4Al}(Al2Si6O22)(Cl,OH)2
  Potassic-ferro-pargasite {K}{Ca2}{Fe2+4Al}(Al2Si6O22)(OH)2Mon. 2/m : B2/m
  Potassic-fluoro-pargasite {K}{Ca2}{Mg4Al}(Al2Si6O22)F2Mon. 2/m : B2/m
  Potassic-pargasite {K}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2Mon.
  Vanadiopargasite NaCa2(Mg4V)(Al2Si6)O22(OH)2Mon. 2/m : B2/m
Sadanagaite Root Name A (Ca2)(Z2+3Z3+2)(Si5Al3O22)(OH,F,Cl)2Mon.
  Ferri-fluoro-sadanagaite {Na}{Ca2}{Mg3Fe3+2}(Al3Si5O22)F2
  Ferri-sadanagaite {Na}{Ca2}{Mg3Fe3+2}(Al3Si5O22)(OH)2
  Ferro-ferri-fluoro-sadanagaite {Na}{Ca2}{Fe2+3Fe3+2}(Al3Si5O22)F2
  Ferro-ferri-sadanagaite {Na}{Ca2}{Fe2+3Fe3+2}(Al3Si5O22)(OH)2Mon.
  Ferro-fluoro-sadanagaite {Na}{Ca2}{Fe2+3Al2}(Al3Si5O22)F2
  Ferro-sadanagaite {Na}{Ca2}{Fe3Al2}(Al3Si5O22)(OH)2
  Fluoro-sadanagaite {Na}{Ca2}{Mg3Al2}(Al3Si5O22)F2
  Potassic-chloro-sadanagaite {K}{Ca2}{Mg3Al2}(Al3Si5O22)Cl2
  Potassic-ferri-sadanagaite {K}{Ca2}{Mg3Fe3+2}(Al3Si5O22)(OH)2
  Potassic-ferro-chloro-sadanagaite {K}{Ca2}{Fe2+3Al2}(Al3Si5O22)Cl2
  Potassic-ferro-ferri-sadanagaite {K}{Ca2}{Fe2+3Fe3+2}(Al3Si5O22)(OH)2Mon.
  Potassic-ferro-sadanagaite {K}{Ca2}{Fe2+3Al2}(Al3Si5O22)(OH)2Mon.
  Potassic-sadanagaite {K}{Ca2}{Mg3Al2}(Al3Si5O22)(OH)2Mon.
  Sadanagaite {Na}{Ca2}{Mg3Al2}(Si5Al3O22)(OH)2Mon.
Tremolite-Actinolite Series ☐{Ca2}{Z5}(Si8O22)(OH,F,Cl)2
  Actinolite ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2Mon. 2/m : B2/m
  Ferro-actinolite ☐{Ca2}{Fe2+5}(Si8O22)(OH)2Mon.
  Ferro-fluoro-actinolite ☐{Ca2}{Fe5}(Si8O22)F2
  Fluoro-tremolite ☐{Ca2}{Mg5}(Si8O22)F2Mon. 2/m : B2/m
  Tremolite ☐{Ca2}{Mg5}(Si8O22)(OH)2Mon. 2/m : B2/m
Tschermakite Root Name ☐(Ca2)(Z2+3Z3+2}(Al2Si6O22)(OH,F,Cl)2
  Ferri-fluoro-tschermakite ☐{Ca2}{Mg3Fe3+2}(Al2Si6O22)F2
  Ferri-tschermakite ☐{Ca2}{Mg3Fe3+2}(Al2Si6O22)(OH)2Mon.
  Ferro-ferri-fluoro-tschermakite ☐{Ca2}{Fe2+3Fe3+2}(Al2Si6O22)F2
  Ferro-Ferri-tschermakite ☐{Ca2}{Fe2+3Fe3+2}(Al2Si6O22)(OH)2Mon.
  Ferro-fluoro-tschermakite ☐{Ca2}{Fe2+3Al2}(Al2Si6O22)F2
  Ferro-tschermakite ☐{Ca2}{Fe2+3Al2}(Al2Si6O22)(OH)2Mon. 2/m : B2/m
  Fluoro-tschermakite ☐{Ca2}{Mg3Al2}(Al2Si6O22)F2
  Tschermakite ☐(Ca2)(Mg3Al2)(Al2Si6O22)(OH)2Mon. 2/m : B2/m

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Calcium Amphibole Subgroup in petrologyHide

References for Calcium Amphibole SubgroupHide

Reference List:
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Leake, B.E. (1968) A catalog of analyzed calciferous and sub-calciferous amphiboles together with their nomenclature and associated minerals. Geological Society of America Special Paper 98.
Papike, J.J., Ross, M., Clark, J.R. (1969) Crystal chemical characterization of clinoamphiboles based on five new structure refinements. Mineralogical Society of America Special Paper 2: 117-136.
Saxena, S.K., Ekstrom, T.K. (1970) Statistical chemistry of calcic amphiboles. Contributions to Mineralogy and Petrology: 26: 276-284.
Welch, M.D., Lu, S., Klinowski, J. (1998) 29Si MAS NMR systematics of calcic and sodic-calcic amphiboles. American Mineralogist: 83: 85-96.
Robert, J.-L., Della Ventura, G., Hawthorne, F.C. (1999) Near-infrared study of short-range disorder of OH and F in monoclinic amphiboles. American Mineralogist: 84: 86-91.
Hawthorne, F.C., Oberti, R., Harlow, G.E., Maresch, W.V., Martin, R.F., Schumacher, J.C., Welch, M.D. (2012) Nomenclature of the amphibole supergroup. American Mineralogist: 97: 2031–2048.

Internet Links for Calcium Amphibole SubgroupHide

Localities for Calcium Amphibole SubgroupHide

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