R. Hutchison (NHM-Londra), S.J.B. Reed (UniCamb) and P.A. Bland (OU)
Comments
Px range to lower Fs values, often twinned, isotropic glass. Petrographic type (3.9-4) based on Ol Fa statistics, but isotropic glass in chondrules (P.A. Bland and L. Folco). Petrographic type 3.6 in the Meteoritical Bulletin Database (since 2006).
Other data
References
Ferraris C., Folco L. and Mellini M. (2001) Crystallization sequences and cooling histories of pyroxenes in IIAB and IIB chondrules from unequilibrated H-chondrites. Meteorit. Planet. Sci. 36(S9), A57. https://doi.org/10.1111/j.1945-5100.2001.tb01542.x
Ferraris C., Folco L. and Mellini M. (2002) Chondrule thermal history from unequilibrated H chondrites: A transmission and analytical electron microscopy study. Meteorit. Planet. Sci. 37(10), 1299-1321. https://doi.org/10.1111/j.1945-5100.2002.tb01030.x
Ferraris C., Folco L. and Mellini M. (2003) Sigmoidal exsolution by internal shear stress in pyroxenes from chondritic meteorites. Phys. Chem. Minerals 30(9), 503-510. https://doi.org/10.1007/s00269-003-0349-8