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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
mindat.org URL:http://www.mindat.org/min-11009.html
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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.

Internet Links for Ferripedrizite

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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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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 12th Nov 2009 01:17:20