Raphides in the Uncalcified Siphonous Green Seaweed, Codium minus (Schmidt) P. C. Silva

Table 1

D-spacing from electron diffraction of needles from Codium minus and for calcium oxalate [19] and standards (JCPDS, 1986) for calcium carbonate as calcite (24–27C; 5–586).

Needles	Oxalate	CaCO3	CaCO3
2.767	2.75	2.83	2.845
2.434	2.4	2.495	2.495
1.695	1.69	1.6259	1.626