General Information: Chemical Formula:(Ca/2,Na)0,3(Mg,Fe++)3(Si,Al)4O10(OH)2·4(H2O)
Composition:(Molecular Weight = 480.19 gm)
Sodium 0.48 %
NaCalcium 0.83 %
CaMagnesium 11.39 %
MgAluminum 5.62 %
AlIron 8.72 %
FeSilicon 17.55 %
SiHydrogen 2.10 %
H Oxygen 53.31 %
O Empirical Formula: Ca0.1Na0.1Mg2.25Fe2+0.75Si3AlO10(OH)2·4(H2O)
Environment:Amygdaloidal cavities in basalts.
Locality:Lizard Head in Cornwall, England.
Name Origin:From the Latin, sapo meaning "soap.'
Physical Properties: Cleavage:[001] Perfect
Color:white, yellowish white, greenish white, reddish white, or bluish white.
Density:2.3
Diaphaniety:Subtranslucent to opaque
Habits:Massive - Uniformly indistinguishable crystals forming large masses., Granular - Generally occurs as anhedral to subhedral crystals in matrix.,
Hardness:1.5-2 - Talc-Gypsum
Luminescence:None.
Luster:Earthy (Dull)
Streak:white
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