Article · Wikipedia archive · Last revised Jun 29, 2026

Aspidolite

Aspidolite is a mica group phyllosilicate mineral, the sodium analogue of the magnesium-rich mineral phlogopite. The ideal chemical formula for aspidolite is NaMg3AlSi3O10(OH)2.

Last revised
Jun 29, 2026
Read time
≈ 1 min
Length
106 w
Citations
3
Source
Aspidolite
General
CategoryPhyllosilicate minerals
GroupMica group, trioctahedral mica group
FormulaNaMg3AlSi3O10(OH)2
IMA symbolAsp1
Crystal systemMonoclinic
Crystal class2/m
Space groupC2/m
Unit cella = 5.291(8), b = 9.16(2), c = 10.12(2) Å
Identification
FractureMicaceous
Optical propertiesBiaxial (-)
References2

Aspidolite is a mica group phyllosilicate mineral, the sodium analogue of the magnesium-rich mineral phlogopite. The ideal chemical formula for aspidolite is NaMg3AlSi3O10(OH)2.2

References

References

External image
Aspidolite (Kasuga, Japan)