Phillipsite-Na, Gyrolite, Analcime
Terra do Baptista gabbro outcrop, Porto da Cruz, Machico, Madeira Island, Madeira, Portugal
Group of colorless phillipsite-Na, associated to creamy gyrolite and tiny analcime.
EDS, P-XRD and Raman analyzed.
Note: Unlike what happens in the surrounding basalts, and most of the island, where the zeolites (phillipsite, chabazite, lévyne...) tend to be the Ca end members, in the gabbro we found the Na end members. That is true for the ...
© Pedro Alves