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The particle mass density or particle density of a material (such as particulate solid or powder) is the mass density of the particles that make up the powder. Particle density is in contrast to the bulk density, which measures the average density of a large volume of the powder in a specific medium (usually air).
Particle density may refer to: Particle density (packed density) , density of material that particles are composed of Particle density (particle count) , average number of particles in unit volume or unit area
Relative density, also called specific gravity, [1] [2] ... The particle density of a powder, to which the usual method of weighing cannot be applied, can also be ...
ρ p: Actual particle density (g/cm 3) ρ g: Gas or sample matrix density (g/cm 3) r 2: Least-squares coefficient of determination. The closer this value is to 1.0, the better the data fit to a hyperplane representing the relationship between the response variable and a set of covariate variables.
where = / is the particle density. However, barring a few simple cases such as the ideal gas model, precise calculations of the proportionality factor are impossible analytically. Therefore, approximate expressions are often used.
calculation of () Radial distribution function for the Lennard-Jones model fluid at =, =.. In statistical mechanics, the radial distribution function, (or pair correlation function) () in a system of particles (atoms, molecules, colloids, etc.), describes how density varies as a function of distance from a reference particle.
The density calculated from a volume measured using a gas pycnometer is often referred to as skeletal density, [13] [14] true density [15] [16] or helium density. [ 16 ] For non-porous solids a pycnometer can be used to measure particle density .
In other words, the configuration of particle A in state 1 and particle B in state 2 is different from the case in which particle B is in state 1 and particle A is in state 2. This assumption leads to the proper (Boltzmann) statistics of particles in the energy states, but yields non-physical results for the entropy, as embodied in the Gibbs ...