Thermodynamic properties of small amorphous and crystalline Silica particles at low temperatures A. Nittke, P. Esquinazi, H.-C. Semmelhack, A. L. Burin and A. Z. Patashinskii Eur. Phys. J. B, 8 1 (1999) 19-30 Published online: 15 March 1999 DOI: 10.1007/s100510050664