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


Locality type:Village
Classification
Species:Cordierite
Formula:Mg2Al4Si5O18
Chemical Analyses:
Oxide wt%:
1
SiO249.63 %
Al2O334.40 %
Fe2O30.23 %
FeO1.53 %
MgO12.77 %
CaO0.61 %
Na2O0.30 %
H2O+0.34 %
Total:99.81 %
Sample references:
1 -
v. Knorring, O., Sahama, Th.G., Lehtinen, M. (1969) Kornerupine-bearing gneiss from Inanakafy near Betroka, Madagascar. Bulletin of the Geological Society of Finland, 41. 79-84 doi:10.17741/bgsf/41.008
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
Data
Mineral Data:Click here to view Cordierite data
Locality Data:Click here to view Ianakafy (Inanakafy), Ianakafy, Betroka District, Anosy, Madagascar
Data Identifiers
Mindat Occurrence Record ID:367041
Long-form Identifier:1:3:367041:5
GUID (UUID V4):0
References
v. Knorring, O., Sahama, Th.G., Lehtinen, M. (1969) Kornerupine-bearing gneiss from Inanakafy near Betroka, Madagascar. Bulletin of the Geological Society of Finland, 41. 79-84 doi:10.17741/bgsf/41.008
 
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