give simplified endmembers useful name

burnman/tools/polytope.py

@@ -258,9 +258,17 @@ def simplify_composite_with_composition(composite, composition):
  f = sol[0]
  except AttributeError:
  f = None
+ new_name = f"{ph.name} (transformed)"
  soln = transform_solution_to_new_basis(
- ph, new_basis, molar_fractions=f
+ ph, new_basis, solution_name=new_name, molar_fractions=f
  )
+ for h, name in enumerate(soln.endmember_names):
+ if name == "User-created endmember":
+ new_name = (
+ f"Derived member (occupancies: {soln.endmembers[h][1]})"
+ )
+ soln.endmembers[h][0].name = new_name
+ soln.endmember_names[h] = new_name
  new_phases.append(soln)
  else:
  logging.info(