What's Changed
* capital isotopes by RemDelaporteMathurin in https://github.com/RemDelaporteMathurin/h-transport-materials/pull/79
* New RAFM steel data (from Causey) by RemDelaporteMathurin in https://github.com/RemDelaporteMathurin/h-transport-materials/pull/81
* DOI Badge latest by RemDelaporteMathurin in https://github.com/RemDelaporteMathurin/h-transport-materials/pull/83
* added 3 empty groups by RemDelaporteMathurin in https://github.com/RemDelaporteMathurin/h-transport-materials/pull/84
* initial form by RemDelaporteMathurin in https://github.com/RemDelaporteMathurin/h-transport-materials/pull/85
* New classes + tests by RemDelaporteMathurin in https://github.com/RemDelaporteMathurin/h-transport-materials/pull/88
* Recombination coefficients by RemDelaporteMathurin in https://github.com/RemDelaporteMathurin/h-transport-materials/pull/90
* added __str__ methods for classes by RemDelaporteMathurin in https://github.com/RemDelaporteMathurin/h-transport-materials/pull/91
* PropertiesGroup inherits from list by RemDelaporteMathurin in https://github.com/RemDelaporteMathurin/h-transport-materials/pull/92
* Plot group by RemDelaporteMathurin in https://github.com/RemDelaporteMathurin/h-transport-materials/pull/93
* Removed the duplicate Serra properties by RemDelaporteMathurin in https://github.com/RemDelaporteMathurin/h-transport-materials/pull/94
* Export to json by RemDelaporteMathurin in https://github.com/RemDelaporteMathurin/h-transport-materials/pull/96
* `note` attribute for `Property` by RemDelaporteMathurin in https://github.com/RemDelaporteMathurin/h-transport-materials/pull/97
**Full Changelog**: https://github.com/RemDelaporteMathurin/h-transport-materials/compare/v0.5.2...v0.6.0