Russian Journal of Applied Chemistry, 2009, Vol. 82, No. 10, pp. 1821−1828.
Pleiades Publishing, Ltd., 2009.
Original Russian Text Yu.T. Lapina, A.S. Savitskii, E.V. Motina, N.V. Bychin, A.A. Lobanova, N.I. Golovin, 2009, published in Zhurnal Prikladnoi Khimii,
2009, Vol. 82, No. 10, pp. 1669−1676.
STUDIES IN THE FIELD OF CHEMISTRY OF NITRO COMPOUNDS
(TO 100TH BIRTHDAY ANNIVERSARY OF S. S. NOVIKOV)
Yu. T. Lapina
, A. S. Savitskii
, E. V. Motina
, N. V. Bychin
A. A. Lobanova
, and N. I. Golovina
Federal Scientiﬁ c and Industrial Center “Altai,” Biysk, Russia
Institute of the Problems of Chemical Physics, Russian Academy of Science, Chernogolovka,
Moscow oblast, Russia
Received April 29, 2009
Abstract—Conditions of recrystallization of hexanitrohexaazawurtcitane from one polymorphic state into another
were examined. Techniques for preparations of various polymorphic modiﬁ cations of product were developed.
Synthesis of new high power substances are one
of the priority trends in development of defense and
space technologies. Thus,
polycyclic nitramine (HNIW, CL-20) is the urgent and
promising subject of studies. It was for the ﬁ rst time
synthesized in 1987 in Naval Air Wifave Center (USA).
It possesses the combination of unique power properties
and can have the widest ﬁ eld of application :
Under the normal conditions there are four stable
polymorphous modiﬁ cations of the product: α, β, γ and
ε, which distinguish by conformations, by a nature of
packing of molecules in a crystal, by density and other
physical properties (Table 1) [1–3].
There exists labile ξ- polymorphous modiﬁ cation
under the increased pressure [2, 4]. ε- Polymorph is the
most high-density (the commodity product is HNIW).
Literature data shows that many studies of
polymorphous regroupings in the solid product under
the action of the increased temperatures and pressure
were conducted [4, 5]. Nine transformations between
ﬁ ve known polymorphous modiﬁ cations: γ-α, γ-β, γ-ε,
γ-ξ, ξ > ε, β > ε, β > α, ε > α, ξ > α were described. It was
Table 1. The properties of the polymorphic modiﬁ cations of HNIW
The value for a semihydrate of α-modefecation.