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Re: Hardness, Calcium, Magnesium

Date: Tue, 10 Apr 2001 16:41:02 -0400
From: Jamie Johnson
> Not quite. There is no such compound as Magnesium
> carbonate (MgCO3). The closest thing I could find is
> magnesium carbonate hydroxide
> (MgCO3)4 - Mg(OH)2 - 5H20, which has a MW of ~485.

artinite: MgCO3*Mg(OH)2*3H2O  mw 196.98
hydromagnesite: 3MgCO3*Mg(OH)2*3H2O  mw 365.31
lansfordite: MgCO3*5H2O  mw 174.39
nesquehonite: MgCO3*3H2O  mw  138.36

Some naturally- occurring forms you can add to your list. The values come
straight from CRC Handbook of Physics and Chemistry...


David A. Youngker
nestor10 at mindspring_com