Hauckite

General Information:
 Chemical Formula:
(Mg,Mn++)24Zn18Fe+++3(SO4)4(CO3)2(OH)81 (?)
 Composition:
(Molecular Weight = 3,993.55 gm)
Magnesium 10.95 % Mg
Manganese 8.25 % Mn
Zinc 29.47 % Zn
Iron 4.20 % Fe
Hydrogen 2.04 % H 
Carbon 0.60 % C 
Sulfur 3.21 % S 
Oxygen 41.27 % O 
 Empirical Formula:
Mg18Mn2+6Zn18Fe3+3(SO4)4(CO3)2(OH)81
 Environment:
Secondary mineral associated with phlogopite and mooreite on a calcite-serpentine matrix.
 IMA Status:
Approved IMA 1979
 Locality:
Sterling Hill mine, Ogdensburg, NJ, USA.
 Name Origin:
Named in 1980 for Richard Hauck, (1935-), New Jersey mineral collector.
Physical Properties:
 Cleavage:
[0001] Perfect
 Color:
bright orange or light yellow.
 Density:
3.02 - 3.1, Average = 3.06
 Diaphaniety:
Transparent
 Habits:
Platy - Sheet forms (e.g. micas)., ,
 Hardness:
2-3 - Gypsum-Calcite
 Luminescence:
Non-fluorescent.
 Luster:
Vitreous - Pearly
 Streak:
light yellow
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