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Ferripedrizite

Formula:
NaLi
 
2
(Fe
 
2
Mg
 
2
Li)Si
 
8
O
 
22
(OH)
 
2
System:MonoclinicColour:Black
Lustre:VitreousHardness:6
Name:After the locality on the Pedriza massif, Spain.


Amphibole Group.

Forms a solid solution series with Leakeite.

Originally reported from Arroyo de la Yedra, Eastern Pedriza Massif, Sierra de Guadarrama, Madrid, Spain.


Classification of Ferripedrizite

IMA status:Discredited 2002
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Physical Properties of Ferripedrizite

Lustre:Vitreous
Colour:Black
Streak:Grey
Hardness (Mohs):6
Cleavage:Perfect
Perfect

Crystallography of Ferripedrizite

Crystal System:Monoclinic

Optical Data of Ferripedrizite

Type:Biaxial (-)
RI values: nα = 1.695 nβ = 1.700 nγ = 1.702
2V:Measured: 55° , Calculated: 64°
Maximum Birefringence:δ = 0.007

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:r > v

Chemical Properties of Ferripedrizite

Formula:
NaLi
 
2
(Fe
 
2
Mg
 
2
Li)Si
 
8
O
 
22
(OH)
 
2
Essential elements:Fe, H, Li, Mg, Na, O, Si
All elements listed in formula:Fe, H, Li, Mg, Na, O, Si

Other Names for Ferripedrizite

Synonyms:
IMA2001-032
Other Languages:
German:Ferripedrizit
Russian:Феррипедрисит
Spanish:Ferripedrizita

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 Ferripedrizite

Reference List:American Mineralogist: 87: 976-982.

Hawthorne, Frank C., and Roberta Oberti (2006): On the classification of amphiboles: Canadian Mineralogist:
44(1): 1-21.

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    Localities for Ferripedrizite

    (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.
    Spain
     
    • Madrid
      • Sierra de Guadarrama
        • Eastern Pedriza Massif
    Am. Min. 87:976-982.
    Mineral and/or Locality
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