added unit cell figure

diff --git a/posic/figs/unit_cell.fig b/posic/figs/unit_cell.fig
new file mode 100644 (file)
index 0000000..7bc8723
--- /dev/null
+++ b/posic/figs/unit_cell.fig
@@ -0,0 +1,128 @@
+#FIG 3.2  Produced by xfig version 3.2.5
+Landscape
+Center
+Metric
+A4      
+100.00
+Single
+-2
+1200 2
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