>> I have small single crystals of an organic compound, A.
>> By heating these crystals at about 300 C, a decomposition of A takes place
>> (nothing wrong, yet) with about 20 percent mass loss. The obtained
>>compound is
>> in crystalline form, and it seems exactly like A (small needles,
>>crystals-like);
>> there is no melting or sublimation below 300 (the crystals are too small
>>for a
>> four-circle tentative).
>> It this possible ?
Given the question and the answer of Joerg Bergmann, I strongly recommend
Thermogravimetry and Differential-Scanning-Calorimetry measurements. If
possible, connect a Mass-Spectrometer to the TG-exhaust.
Results of these investigations will give you more reasonable hints about
what's going on.
Carsten
Carsten Schinzer -----------------------------------------
Institut de Chimie de la Matiere Condensee de Bordeaux
Chateau Brivazac
87, Avenue du Docteur A. Schweitzer
F - 33608 PESSAC CEDEX
tel +33 556 842 650 fax +33 556 842 640
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