(a) Phillipsite, published compositions from [1] Passaglia et al. 1990; [2] de Gennaro et al. 2000; [3] Gatta et al. 2010; [4] Jakobsson and Moore 1986. (b) Al-tobermorite, various geologic deposits (after [5] Jackson et al. 2013a). [6] Aguirre et al. 1998; Claringbull and Hey 1952; [7] Livingstone 1988; [8] Henmi and Kusachi 1992; [9,10] Hoffman and Armbuster 1997; Merlino et al. 2001; [11] Mitsuda and Taylor 1978. Roman crystals have Al/(Si+Al) = 0.10–0.16 and Ca/(Si+Al) = 0.45–0.69. Sodium and potassium range from 1–3 wt%. ANZ = Portus Neronis; BAI = Baianus Sinus; PCO = Portus Cosanus; NYT = Neapolitan Yellow Tuff; BT = Bacoli Tuff.
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- Ancient concrete: Learning to do as the Romans did, Tuesday, July 4, 2017 - 04:19