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|System:||Monoclinic||Colour:||Colorless, pale yellow ...|
|Hardness:||1 - 2|
|Name:||Named after Professor Andrea Alietti ((b. 1923) of the University of Modena, Modena, Italy, who first studied the structure of the mineral.|
A regularly interstratified talc-saponite mineral.
Classification of Aliettite
|Strunz 8th edition ID:||8/H.18-20|
|Nickel-Strunz 10th (pending) edition ID:||9.EC.60|
9 : SILICATES (Germanates)
E : Phyllosilicates
C : Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets
|Dana 8th edition ID:||188.8.131.52|
71 : PHYLLOSILICATES Sheets of Six-Membered Rings
4 : Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra
|Hey's CIM Ref.:||16.7.8|
16 : Silicates Containing Aluminum and other Metals
7 : Aluminosilicates of Mg
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Type Occurrence of Aliettite
|Type Locality:||Monte Chiaro, Taro Valley, Albareto, Parma Province, Emilia-Romagna, Italy|
|Year of Discovery:||1968|
Occurrences of Aliettite
|Geological Setting:||An alteration product in serpentinized ophiolites and residual in soils derived therefrom; in altered dolostones.|
Physical Properties of Aliettite
|Colour:||Colorless, pale yellow or green|
|Hardness (Mohs):||1 - 2|
Crystallography of Aliettite
|Morphology:||Irregular, tabular to platy crystals, < 2 µm, with curled edges when viewed under the electron microscope; as microscopic rounded aggregates.|
Optical Data of Aliettite
|RI values:||nα = 1.556 nβ = 1.567|
|Maximum Birefringence:||δ = 1.556|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Chemical Properties of Aliettite
|Simplified for copy/paste:||Ca0.2Mg6((Si,Al)8O20)(OH)4·4H2O|
|Essential elements:||Ca, H, Mg, O, Si|
|All elements listed in formula:||Al, Ca, H, Mg, O, Si|
Relationship of Aliettite to other Species
|Member of:||Smectite Group|
|Other Members of Group:|
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Aliettite
|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 Aliettite
American Mineralogist: 57: 598.
American Mineralogist: 67: 395.
Internet Links for Aliettite
Localities for Aliettite
The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(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.
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Locality Updated: Calbrita quarries, Alenquer, Lisbon District, PortugalFrom Rui Nunes, 27th Nov 2014 21:06:00