
General Information:

Chemical Formula:
PbMn3Al4(CO3)4(SO4)O5·5(H2O)

Composition:
(Molecular Weight = 986.11 gm)
Manganese 16.71 %
MnAluminum 10.94 %
AlHydrogen 1.02 %
H Lead 21.01 %
PbCarbon 4.87 %
C Sulfur 3.25 %
S Oxygen 42.18 %
O 
Empirical Formula:
PbMn2+3Al4(CO3)4(SO4)O5·5(H2O)

Environment:
Found as fissure fillings with cerrusite in sooty pyrolusite and Fe oxides in polymetallic ore zone in granodiorite.

Locality:
Sardab, E of Altyn-Topkansk ore field, Kuraminsk Mountains, Kazakhstan.

Name Origin:
Named after B. N. Nasledov (1891-1942) of Russia.
Physical Properties:

Color:
snow white.

Density:
3.069

Habits:
Oolitic -

Hardness:
2 - Gypsum

Luster:
Silky

Streak:
white
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