diff --git a/cells/thaumatin.cell b/cells/thaumatin.cell
new file mode 100644
index 0000000..cf129f1
--- /dev/null
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+CrystFEL unit cell file version 1.0
+
+lattice_type = tetragonal
+unique_axis = c
+centering = P
+a = 58.50 A
+b = 58.50 A
+c = 151.25 A
+al = 90.00 deg
+be = 90.00 deg
+ga = 90.00 deg