Atomic mass, quantity type A, default unit g/mole Density General material properties General material property (const or vector) Radiation length A reference to a previsouly defined named radiation length quantity value Absorption length A reference to a previsouly defined named absorption length quantity value Temperature A reference to previously defined named temperature quantity value Pressure A reference to previously defined named pressure quantity value General material attributes Material name Material chemical formula Material physical state Base type for materials Materials description Material related definitons of constants and quantities In this version of schema these become visible in global scope An isotope A simple element or an element composed of isotopes A composite or a mixture complex material Exported isotope type Density quantity value A reference to a previsouly defined named density quantity value Number of nucleons Atomic number Exported material element type Density quantity value A reference to a previsouly defined named density quantity value An element can be defined either as a simple element or by a set of isotopes fractions An isotope fraction of an element where n is the actual amount of the isotope in the element Number of nucleons Atomic number Exported material composite or mixture type Density quantity value A reference to a previsouly defined named density quantity value A complex material can be defined as a simple mixture when its material properties are known or as a composite material or a mixture. A composite material is defined by a set of elements by specifying the number of atoms. The second way is by a set of material fractions where the fractions can be either simple elements or other complex materials. The restriction is that one can't mix composition by atoms and fractions at the same time. Elements of this composite material specified as a set of local references to already defined simple elements where value of n in each means the number of atoms Fractions of this mixture specified as a set of local references to already defined elements or other mixtures where value of n in each means the fraction of the whole material in the range 0.0 < n < 1.0 Atomic number