# Aristotype

An aristotype is a high-symmetry structure type that can be viewed as an idealized version of a lower-symmetry structure. It was introduced by Helen Megaw in relation to perovskites, where it is still mostly used. The cubic perovskite structure (which is adopted at most by half a dozen compounds) is regarded as the aristotype for the vast array of other lower-symmetry perovskites. The lower-symmetry structure is **hettotype**.

After Buerger, aristotypes are also known as **basic structures** and hettotypes as **derivative structures**.

Originally, an aristotype is a printing-out

### References

- Buerger, M.J. (1947).
*Derivative Crystal Structures*, J. Chem. Phys.,**15**, 1-16. - Megaw H. (1973).
*Crystal Structures*, London: W.B. Saunders, p. 216, 282