Given that man, I cherished the drive right up All of us step step step step three95 and you will United states six into the the fresh Owens Area during the Ca
As potassium and you will sodium try chemically equivalent — he is alkali steel facets — and you will often means singly charged ions, K + & Na + , while calcium supplements is actually chemically some more http://www.datingranking.net/pl/amino-recenzja (a keen alkaline earth ) and you will forms doubly billed ions, Ca +dos (and thus we require a couple of aluminum atoms for two silicons, unlike the only for three that have potassium and you may salt), we could possibly expect potassium and you can salt feldspars to get chemically different of calcium feldspar. not, it is just an element of the tale.
It turns out, basalts and you may gabbros prefer calcium and you can granites and you can rhyolites choose the akalis
Potassium feldspar, KAlSi3O8 is relatively distinct as Orthoclase („straight break“ in Greek), while sodium, NaAlSi3O8 and calcium, CaAl2Si2O8 , feldspars form the Plagioclase Series („slanting break“ — both names describe characteristics of the crystals). A smooth transition occurs from pure sodium to pure calcium in plagioclase, with similar crystal structure. From sodium to potassium we do get the Alkali feldspars , but these form a continuous series only when formed at high temperatures. (mehr …)