Feldspar is not a single mineral, but a group of minerals. There is no single scientific name for "feldspar".

The term "feldspar" is a general name for a group of rock-forming tectosilicate minerals that make up about 60% of the Earth's crust. The most common feldspars are:

* Orthoclase (KAlSi3O8)

* Albite (NaAlSi3O8)

* Anorthite (CaAl2Si2O8)

These are just the end members of a solid solution series. There are also many other feldspars, including:

* Sanidine (KAlSi3O8)

* Microcline (KAlSi3O8)

* Oligoclase (NaAlSi3O8 - CaAl2Si2O8)

* Labradorite (NaAlSi3O8 - CaAl2Si2O8)

* Bytownite (NaAlSi3O8 - CaAl2Si2O8)

So, while there is no single scientific name for "feldspar", there are specific names for the different types of feldspar minerals.