fig3
![First-principles study on the negative/zero area compressibility in Ag<sub>3</sub>BO<sub>3</sub> with “wine-rack” architecture](https://image.oaes.cc/da5b8ea0-9bd9-40a2-b346-770898aade90/microstructures4063.fig.3.jpg)
Figure 3. The calculated enthalpy and variation of cell parameters in Ag3Co(CN)6 and Ag3BO3vs. pressure. (A) Pressure-dependent enthalpy for the low and high-pressure phases of Ag3Co(CN)6. (B) Pressure-dependent cell parameters of Ag3Co(CN)6. (C) Pressure-dependent enthalpy in Ag3BO3-I and Ag3BO3-II. (D) The relative change of pressure-dependent cell parameters in Ag3BO3-I and