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Cordierite from
Ianakafy (Inanakafy), Ianakafy Commune, Betroka District, Anosy, Madagascar

Classification
Species:Cordierite
Formula:(Mg,Fe)2Al3(AlSi5O18)
Chemical Analyses:
Oxide wt%:
1
SiO249,63 %
Al2O334,40 %
Fe2O30,23 %
FeO1,53 %
MgO12,77 %
CaO0,61 %
Na2O0,30 %
H2O+0,34 %
Total:96 %
Sample references:
SampleReference
1 - von Knorring, O., Sahama, Th.G., and Lehtinen, M. (1969) Kornerupine-bearing gneiss from Inanakafy near Betroka, Madagascar. Bulletin of the Geological Society of Finland: 41: 79-84.
Comments:a very Mg-rich variety with ca. 7 mol. % of the iron component
Habit:oval-shaped monomineralic aggregates
Colour:slightly bluish
Confirmation
Validity:Believed Valid
References
References:von Knorring, O., Sahama, Th.G., and Lehtinen, M. (1969) Kornerupine-bearing gneiss from Inanakafy near Betroka, Madagascar. Bulletin of the Geological Society of Finland: 41: 79-84.
Data
Mineral Data:Click here to view Cordierite data
Locality Data:Click here to view Ianakafy (Inanakafy), Ianakafy Commune, Betroka District, Anosy, Madagascar
Mineral and/or Locality  
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