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Lapparentite (of Rost)

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Formula:
Al
 
2
(SO
 
4
)
 
2
(OH)
 
2
·9H
 
2
O ?
Colour:White


Occurs as chalky white masses. See Aluminite for comparison.

Classification of Lapparentite (of Rost)

IMA status:Not Approved
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Physical Properties of Lapparentite (of Rost)

Lustre:Dull
Diaphaneity (Transparency):Opaque
Colour:White
Density (measured):1.892 g/cm3

Crystallography of Lapparentite (of Rost)

Morphology:Crystals are rhomboidal tablets with internal angles of 82° and 98°.

Optical Data of Lapparentite (of Rost)

Type:Biaxial (+)

Chemical Properties of Lapparentite (of Rost)

Formula:
Al
 
2
(SO
 
4
)
 
2
(OH)
 
2
·9H
 
2
O ?
All elements listed in formula:Al, H, O, S

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Lapparentite (of Rost)

Reference List:

- +
Rost (1937) Intern. ac. sc. Bohême, Bull., preprint, 7pp.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 601.

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    • Localities for Lapparentite (of Rost)

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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Central Bohemia Region
        • Kladno
          • Libušin
    		Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 601.
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