> human tissues
> isolated wires
> alternated sheets
The thinks you describes are systems made of multiple materials. Are you aware of a materials that behave that way by its own ?
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To give an extreme example: Bundles of carbon nanotubes. Or carbon nanotube cloth. It's pure carbon.
A lot of materials (including any crystal) have a sense of direction.
No, and LK-99 isn’t made of a single material either.
How do you mean? It isn’t like a wire where you typically have separate insulator and conductor materials, is it?
Can you elaborate on that ? For noobs like me, LK-99 only contains Pb9Cu(PO4)6O, doesn’t it ?
_If_ some of its properties change depending on the direction you measure, it can’t look the same in all directions.
As a simple example, consider graphite. That’s just ‘C’, but the crystalline version is layered, so it behaves differently depending on what direction you look at it.
Like wood, it will split easier when hammered parallel to the layers than when hit oblique to it.
Diamond and graphite both only contain C.
TV rock for a similar thing optically.
Graphite