Assertion: calcium carbonate's form | /r/HasProperty | 4 h 2 o
Facets:
Source sentences:
text: Some basic forms such as artinite (MgCO 3 ·Mg(OH) 2 ·3 H 2 O), hydromagnesite (4 MgCO 3 ·Mg(OH) 2 ·4 H 2 O), and dypingite (4 MgCO 3 · Mg(OH) 2 ·5 H 2 O) also occur as minerals.