"Eka boron aluminum silicon" isn't a recognized term in chemistry. It's likely a misunderstanding or a combination of elements that don't make a standard compound.

Here's a breakdown of why:

* Eka boron: This refers to the element predicted by Dmitri Mendeleev to be below boron in the periodic table. This prediction was later fulfilled by the discovery of scandium (Sc).

* Aluminum (Al): A well-known element with its own properties.

* Silicon (Si): Another well-known element.

It's possible you're encountering this phrase in a context where the speaker is trying to describe a hypothetical compound or an element. To provide more relevant information, please provide more context or clarify what you're looking for.