Ferripedrizite Mineral Data

Ferripedrizite Mineral Data

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General Ferripedrizite Information

Chemical Formula:

NaLi2(Fe+++2Mg2Li)Si8O22(OH)2

Composition:

Molecular Weight = 839.32 gm

Potassium 0.19 % K 0.22 % K₂O

Sodium 2.11 % Na 2.84 % Na₂O

Lithium 1.94 % Li 4.17 % Li₂O

Calcium 0.24 % Ca 0.33 % CaO

Magnesium 4.31 % Mg 7.16 % MgO

Titanium 0.51 % Ti 0.86 % TiO₂

Manganese 0.46 % Mn 0.59 % MnO

Aluminum 0.68 % Al 1.28 % Al₂O₃

Zinc 0.08 % Zn 0.10 % ZnO

Iron 16.57 % Fe 7.28 % FeO / 15.60 % Fe₂O₃

Silicon 26.77 % Si 57.27 % SiO₂

Hydrogen 0.16 % H 1.41 % H₂O

Oxygen 44.43 % O

Fluorine 1.56 % F 1.56 % F

- % F -0.66 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

K_0.04Na_0.52Na_0.25Ca_0.05Li_1.7Li_0.64Fe³⁺_1.64Mg_1.49Fe²⁺_0.85Al_0.21Ti_0.09Mn²⁺_0.07Zn_0.01 Si₈O₂₂(OH)_1.31F_0.69

Environment:

Episyenites (non-magmatic hydrothermal rocks) replacing cordierite-bearing monzogranites. Related to Sodic-ferripedrizite as it is the higher temperature phase.

IMA Status:

Approved IMA 2001 (Dana # Added)

Locality:

Eastern Pedriza Massif, Arroyo de la Yedra Valley, Sierra de Guadarrama, Spain. Link to MinDat.org Location Data.

Name Origin:

Named for the locality and as the ferric end member from the IMA-CNMMN and its Amphibole Subcommittee.

Synonym:

IMA2001-032

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Ferripedrizite Crystallography

Axial Ratios:

a:b:c =0.5317:1:0.2962

Cell Dimensions:

a = 9.501, b = 17.866, c = 5.292, Z = 2; beta = 102.17° V = 878.10 Den(Calc)= 3.17

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.05(1)(310), 1.642(0.4)(461), 2.711(0.4)(151),1.394(0.3)(661), 2.747(0.3)(330), 8.251(0.3)(110), 2.161(0.2)(261), 2.495(0.2)(202),

Crystal Structure:

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Caballero J M , Oberti R , Ottolini L , American Mineralogist , 87 (2002) p.976-982, Ferripedrizite, a new monoclinic Li amphibole end-member from the, Eastern Pedriza Massif, Sierra de Guadarrama, Spain, and a restatement, of the nomenclature of Mg-Fe-Mn-Li amphiboles

Physical Properties of Ferripedrizite

Cleavage:

[110] Perfect

Color:

Black.

Diaphaniety:

Translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Inclusions - Generally found as inclusions in other minerals.

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Hardness:

6 - Orthoclase

Luster:

Vitreous (Glassy)

Streak:

gray

Optical Properties of Ferripedrizite

Optical Data:

Biaxial (-), a=1.695, b=1.7, g=1.702, bire=0.0070, 2V(Calc)=64, 2V(Meas)=55. Dispersion r > v.

Calculated Properties of Ferripedrizite

Electron Density:

r_electron=3.12 gm/cc
note: r_{Ferripedrizite}=3.17 gm/cc.

Fermion Index

Fermion Index = 0.02269
Boson Index = 0.97731

Photoelectric:

PE_{Ferripedrizite}= 6.40 barns/electron
U=PE_{Ferripedrizite} x r_electron= 19.94 barns/cc.

Radioactivity:

GRapi = 2.62 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Ferripedrizite - barely detectable

Ferripedrizite Classification

Dana Class:

66.1.1.9a (66)Inosilicate Double-Width Unbranched Chains, W=2

(66.1)Dana Type

(66.1.1)Group 1, the Mg-Fe-Mn-Li amphiboles (Monoclinic)

66.1.1.1 Magnesiocummingtonite (Mg,Fe)7Si8O22(OH)2 C 2/m 2/m

66.1.1.2 Cummingtonite []Mg7Si8O22(OH)2 C 2/m 2/m

66.1.1.3 Grunerite []Fe7Si8O22(OH)2 C 2/m 2/m

66.1.1.3b Permanganogrunerite! []Mn4(Fe)3(Si8O22)(OH)2 C 2/m 2/m

66.1.1.4 Manganocummingtonite Na(Na,Mn)2(Mg4,Fe)5Si8O22(OH)2 C 2/m 2/m

66.1.1.5 Manganogrunerite []Mn2Fe5Si8O22(OH) C 2/m 2/m

66.1.1.6 Magnesioclinoholmquistite? Li2(Mg,Fe)3Al2Si8O22(OH)2 C 2/m 2/m

66.1.1.7 Clinoholmquistite? [](Li2Mg3Al2)Si8O22(OH)2 C 2/m 2/m

66.1.1.8 Clinoferroholmquistite [](Li2Fe3Al2)Si8O22(OH)2 C 2/m 2/m

66.1.1.8a Ferri-clinoholmquistite! []Li2Mg3(Fe3)2(Si8O22)(OH)2 C 2/m 2/m

66.1.1.8b Ferri-clinoferroholmquistite! []Li2(Fe2Fe3)Si8O22(OH)2 C 2/m 2/m

66.1.1.9 Sodic-ferripedrizite! Na(LiNa)(Fe2Mg2Li)Si8O22(OH,F)2 C 2/m 2/m

66.1.1.9a Ferripedrizite ! NaLi2(Fe2Mg2Li)Si8O22(OH)2 C 2/m 2/m

66.1.1.9b Sodic-ferri-ferropedrizite! NaLi2(Fe2Fe3)Si8O22(OH)2 C 2/m 2/m

66.1.1.9c Fluoro-sodic-pedrizite! NaLi2(Mg2Al2Li)S5Si8O22F2 C 2/m 2/m

Strunz Class:

VIII/F.08-81 VIII - Silicates

VIII/F - Inosilicates (chain and band) double chains [Si4O11]6-, Alkali-Amphiboles

VIII/F.08 - Amphibole group, Glaucophane - Riebeckite - Kozulite series

VIII/F.08-10 Glaucophane []Na2(Mg3Al2)Si8O22(OH)2 C 2/m 2/m

VIII/F.08-20 Ferroglaucophane []Na2(Fe3Al2)Si8O22(OH)2 C 2/m 2/m

VIII/F.08-30 Crossite? Na2(Mg,Fe)3(Al,Fe)2Si8O22(OH)2 C 2/m 2/m

VIII/F.08-40 Magnesioriebeckite []Na2(Mg3Fe2)Si8O22(OH)2 C 2/m 2/m

VIII/F.08-50 Riebeckite []Na2(Fe3Fe2)Si8O22(OH)2 C 2/m 2/m

VIII/F.08-56 Fluoronyboite! NaNa2(Al2Mg3)(Si7Al)O22(F,OH)2 C 2/m 2/m

VIII/F.08-60 Nyboite NaNa2(Mg3Al2)Si7AlO22(OH)2 C 2/m 2/m

VIII/F.08-65 Ferronyboite! NaNa2(Fe)3Al2(Si7Al)O22(OH)2 C 2/m 2/m

VIII/F.08-67 Ferric-ferronyboite! NaNa2(Fe)3(Fe)2(Si7Al)O22(OH)2 C 2/m 2/m

VIII/F.08-70 Eckermannite NaNa2(Mg4Al)Si8O22(OH)2 C 2/m 2/m

VIII/F.08-80 Ferro-eckermannite NaNa2(Fe4Al)Si8O22(OH)2 C 2/m 2/m

VIII/F.08-81 Ferripedrizite NaLi2(Fe2Mg2Li)Si8O22(OH)2 C 2/m 2/m

VIII/F.08-83 Sodic-ferripedrizite! Na(LiNa)(Fe2Mg2Li)Si8O22(OH,F)2 C 2/m 2/m

VIII/F.08-84 Ferroleakeite! NaNa2(Fe)3(Fe)2Li(Si8O22)(OH)2 C 2/m 2/m

VIII/F.08-85 Leakeite NaNa2(Mg2Fe2Li)Si8O22(OH)2 C 2/m 2/m

VIII/F.08-86 Fluoro-ferroleakeite NaNa2(Fe2Fe2Li)Si8O22F2 C 2/m 2/m

VIII/F.08-87 Kornite Na(CaNa)Fe4(Al,Fe)Si7AlO22(OH)2 C 2/m 2/m

VIII/F.08-88 Ungarettiite NaNa2(Mn2Mn3)Si8O22O2 C 2/m 2/m

VIII/F.08-89 Obertiite! NaNa2(Mg3FeTi)Si8O22(O,F,OH)2 C 2/m 2/m

VIII/F.08-90 Magnesio-arfvedsonite NaNa2(Mg4Fe)Si8O22(OH)2 C 2/m 2/m

VIII/F.08-92 Fluoro-magnesio-arfvedsonite! NaNa2(Mg,Fe)4Fe[Si8O22](F,OH)2 C 2/m 2/m

VIII/F.08-95 Sodic-ferri-ferropedrizite! NaLi2(Fe2Fe3)Si8O22(OH)2 C 2/m 2/m

VIII/F.08-100 Arfvedsonite NaNa2(Fe4Fe)Si8O22(OH)2 C 2/m 2/m

VIII/F.08-105 Ferriwhittakerite! Na(NaLi)(Mg2Fe2Li)Si8O22(OH)2 C 2/m 2/m

VIII/F.08-110 Kozulite NaNa2Mn4(Fe,Al)Si8O22(OH)2 C 2/m 2/m

VIII/F.08-112 Potassicleakeite! KNa2Mg2Fe2LiSi8O22(OH)2 C 2/m 2/m

VIII/F.08-125 Dellaventuraite! NaNa2(Mg2,Mn,Li,Ti)Si8O22O2 C 2/m 2/m

VIII/F.08-157 Potassicarfvedsonite! KNa2Fe4FeSi8O22(OH)2 C 2/m 2/m

Other Ferripedrizite Information

References:

NAME( AmMin, 87:976) PHYS. PROP.(AmMin, 87:976) OPTIC PROP.(AmMin, 87:976)

See Also:

Links to other databases for Ferripedrizite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Ferripedrizite

NaLi2(Fe+++2Mg2Li)Si8O22(OH)2
Dana No: 66.1.1.9a Strunz No: VIII/F.08-81
Locality:

Notes: