Single crystals density

For pure primary secondary explosives (except for border-line HE such as Ammonium Nitrate or Ammonium Perchlorate) dcr decreases as p0 increases until p0 approaches very close single crystal density when dcr may increase drastically. Thus if we limit ourselves to p0 < 0.9pcrySt, increases in p0 (according to Eq 8) should result in a greater sensitivity to impact. This is quite the opposite of what is found for shock initiation and will be examined more closely later on. At a fixed density, dcr increases as p. increases (see A B, p 90). This increase is fairly pronounced at small p (<0.2 mm) but levels off becomes almost asymptotic at large p (>0.4mm, except for cast TNT or TNT with 1% paraffin oil). Thus an increase in p, as expected, leads to a decrease... 

Obtained in the test method shown in Fig 3 pressures shown are pressures in the inert barrier at the barrier/acceptor interface Single crystal density is 1.63g/cc... 

Data are given for the single-crystal density and for the elastic constants c,., in units of 10 N/m, which is equivalent to 10 dyn/cm. ... 

For the pelleting pressures used (in the range 5-10 kbar), Afanas ev and Bobolev found little effect on measured pressures at explosion. However, they make the point that even at the highest pelleting pressures the density of the pellet is 10% less than single-crystal density, which means that voids and gas pockets remain within the pellets. 

The combustion KDIE is determined from the burn rate ratios (ruhAbd) of the cylindrical HMX and HMX-dg pellets made from identically synthesized i HMX and HMX-dg powders. The HMX and HMX—dg pellet samples are pressed to 96—97 percent of the HMX single crystal density assuring any burn rate... 

As the number of atoms in the asyimnetric unit increases, the solution of a structure by any of these phase-independent methods becomes more difficult, and by 1950 a PhD thesis could be based on a single crystal structure. At about that time, however, several groups observed that the fact that the electron density must be non-negative everywhere could be exploited to place restrictions on possible phases. The first use of this fact was by D Marker and J S Kasper [24], but their relations were special cases of more general relations introduced by J Karle and H Hauptman [25]. Denoting by A. the set of indices h., k., /., the Karle-Hauptman condition states that all matrices of the fonu... 

Germanium single crystals intended for electronic apphcations are usuaHy specified according to conductivity type, dopant, resistivity, orientation, and maximum dislocation density. They may be specified to be lineage-free unless the specified resistivity is below about 0.05 H-cm. Minority carrier lifetime and majority carrier mobHity are occasionaHy specified. 

Table 6. Compositions and Densities of Superalloy Single Crystals...

The two density functions can be related through a simple shape factor as follows. Suppose the mass of a single crystal is and the characteristic dimension of that crystal is E. If the crystal is from a population in which shape is not a function of size, then the mass of any crystal from that population is related to characteristic dimension by a volume shape factor ... 

Recognizing that the mass of crystals in a sample is the product of the number of crystals and the mass of a single crystal, mass and population densities may be related by the expression... 

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