[Bungalow]

I need help with a EDS spectrum. The task is to identify what mineral i've got.
The elements: O, Mg, Al, Si and Fe
I've made some research but can't find any aluminosilicate with iron and magnesium!?

Thanks in advance

p.s: newbie in this forum by the way.
My name is Johannes and i live in Sweden. I'm studying geochemistry.