| 释义 |
pirssonite Min.|ˈpɜːs-, ˈpɪəsənaɪt|
[f. the name of L. V. Pirsson (1860–1919), U.S. geologist: see -ite1.]
A hydrated carbonate of sodium and calcium, Na2Ca(CO3)2.2H2O, occurring as brittle, colourless to white, orthorhombic crystals that are pyroelectric.
1896J. H. Pratt in Amer. Jrnl. Sci. CLII. 130 The author takes pleasure in naming this mineral pirssonite, in honor of his friend and associate, Prof. L. V. Pirsson, of the Sheffield Scientific School. 1933Jrnl. Chem. Soc. 1162 Gaylussite is in equilibrium with pirssonite at 37–40°, the exact temperature depending on the concentration of the sodium carbonate solution with which they are in contact. 1975Nature 13 Mar. 128/2 Large (> 2 cm), apparently diagenetic crystals of pirssonite and gaylussite, oriented by their ‘c’ axes at high angles to bedding, are common in parts of these cores. |