Podcast #128: We chat with Kent C Dodds about why he loves React and discuss what life was like in the dark days before Git. Listen now.
10 of 10 removed tag, removed extraneous requests; retook screenshots, amazon links instead of google books which is not accessible for everybody

How many Ga atoms are connected to one As atom in solid gallium arsenide?

In Boylestad and Nashelsky's Electronic Devices and Circuit Theory, the structure of GaAs is shown as follows:

GaAs structure, 1

Arsenic is shown making five covalent bonds to neighbouring gallium atoms.

However, I recently also saw an alternative depiction in Razeghi's Fundamentals of Solid State Engineering:

GaAs structure, 1

Here, arsenic is shown making four covalent bonds to neighbouring gallium.

Which source is correct? Please give appropriate references or experimental proof.