The thermal expansion coefficient of the asset. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2013 
Syntax
Remarks
 This property cannot be used to set the thermal expansion coefficient for wood-based and isotropic materials. For such assets, use setThermalExpansionCoefficient instead. The value is in inverse Kelvin (1/K). 
 Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentNullException | When setting this property: A non-optional argument was NULL | 
| Autodesk.Revit.Exceptions InapplicableDataException | When setting this property: the material type is wood. -or- When setting this property: the behavior is isotropic. |