Highly oriented pyrolytic graphite is a metal. The layers are stacked together via van der Waals interactions and can be exfoliated into thin 2D layers.
The HOPG crystals have a lateral size of ~1.2 cm and a thickness of 2mm. We have two different grades of HOPG available. The ZYA grade HOPG and ZYB HOPG. Crystal purity is the same for both grades. Main difference is the mosaic spread.
