Sodic-ferripedrizite Mineral Data

General Sodic-ferripedrizite Information

Chemical Formula:

Na(LiNa)(Fe+++2Mg2Li)Si8O22(OH,F)2

Composition:

Molecular Weight = 811.31 gm

Potassium 0.14 % K 0.17 % K₂O

Sodium 3.63 % Na 4.89 % Na₂O

Lithium 1.90 % Li 4.09 % Li₂O

Calcium 0.40 % Ca 0.55 % CaO

Magnesium 5.24 % Mg 8.69 % MgO

Titanium 0.65 % Ti 1.08 % TiO₂

Manganese 0.47 % Mn 0.61 % MnO

Aluminum 0.70 % Al 1.32 % Al₂O₃

Zinc 0.08 % Zn 0.10 % ZnO

Iron 11.36 % Fe 16.24 % Fe₂O₃

Silicon 27.69 % Si 59.25 % SiO₂

Hydrogen 0.17 % H 1.50 % H₂O

Oxygen 46.05 % O

Fluorine 1.52 % F 1.52 % F

- % F -0.64 % -O=F₂

______ ______

100.00 % 99.38 % = TOTAL OXIDE

Empirical Formula:

Na_0.7K_0.03Li_1.34Na_0.58Ca_0.08Mg_1.75Fe³⁺_1.65Li_0.88Al_0.21Ti_0.11Mn²⁺_0.07Zn_0.01Si₈O₂₂ (OH)_1.35F_0.65

Environment:

In hydrothermal episyenites formed after cordierite-bearing porphyritic granites. A member of the amphibole group.

IMA Status:

Approved IMA 1998 (Dana # Added)

Locality:

In the Arroyo de la Yedra, Eastern Pedriza Massif, Sierra de Guadarrama, Central System, Spain. Link to MinDat.org Location Data.

Name Origin:

Named for the locality and the prefixes "ferri" and "sodic" as recommended by the amphibole commission.

Synonym:

ICSD 89815

IMA1998-061

Sodic-ferripedrizite Crystallography

Axial Ratios:

a:b:c =0.536:1:0.2966

Cell Dimensions:

a = 9.536, b = 17.789, c = 5.277, Z = 2; beta = 102.53° V = 873.85 Den(Calc)= 3.08

Crystal System:

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

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

By Intensity(I/I_o): 3.056(1)(310), 2.699(0.6)(151), 2.749(0.54)(330),1.639(0.44)(461), 3.397(0.28)(131), 8.25(0.24)(110), 1.396(0.23)(661), 4.446(0.22)(040), 1.92(0.2)(421),

Physical Properties of Sodic-ferripedrizite

Cleavage:

{110} Perfect, {110} Perfect, 001 Parting

Color:

Green.

Density:

3.15

Diaphaneity:

Semitranslucent

Fracture:

Brittle - Splintery - Brittle fracture leaving splintery fragments.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Hardness:

6 - Orthoclase

Luster:

Vitreous (Glassy)

Streak:

gray

Optical Properties of Sodic-ferripedrizite

Gladstone-Dale:

CI meas= 0.034 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.012 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2266,KPDmeas= 0.2216,KC= 0.2293
Ncalc = 1.71 - 1.72

Optical Data:

Biaxial (-), a=1.694, b=1.698, g=1.702, bire=0.0080, 2V(Calc)=88, 2V(Meas)=83. Dispersion r > v medium.

Calculated Properties of Sodic-ferripedrizite

Electron Density:

Bulk Density (Electron Density)=3.04 gm/cc
note: Specific Gravity of Sodic-ferripedrizite =3.08 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_{Sodic-ferripedrizite}= 4.97 barns/electron
U=PE_{Sodic-ferripedrizite} x r_electron= 15.10 barns/cc.

Radioactivity:

GRapi = 2.07 (Gamma Ray American Petroleum Institute Units)
Concentration of Sodic-ferripedrizite per GRapi unit = 48.40 (%)

Estimated Radioactivity from Sodic-ferripedrizite - barely detectable

Sodic-ferripedrizite Classification

Dana Class:

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

(66.01)with P=2 amphibole configuration

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

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

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

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

66.01.01.03b Permanganogrunerite! []Mn4(Fe)3(Si8O22)(OH)2 C 2/m 2/m

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

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

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

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

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

66.01.01.08a Ferri-clinoholmquistite! []Li2Mg3(Fe3)2(Si8O22)(OH)2 C 2/m 2/m

66.01.01.08b Ferri-clinoferroholmquistite! []Li2(Fe2Fe3)Si8O22(OH)2 C 2/m 2/m

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

66.01.01.09a Ferripedrizite! NaLi2(Fe2Mg2Li)Si8O22(OH)2 C 2/m 2/m

66.01.01.09b Sodic-ferri-ferropedrizite! NaLi2(Fe2Fe3)Si8O22(OH)2 C 2/m 2/m

66.01.01.09c Fluoro-sodic-pedrizite! NaLi2(Mg2Al2Li)S5Si8O22F2 C 2/m 2/m

Strunz Class:

09.DE.05 09 - SILICATES (Germanates)

09.D - Inosilicates* Structural terminology according to Liebau (1985)

09.DE -Inosilicates with 2-periodic double chains, Si4O11; amphibole family

09.DE.05 Ferro-anthophyllite []Fe7Si8O22(OH)2 P nma 2/m 2/m 2/m

09.DE.05 Anthophyllite []Mg7Si8O22(OH)2 P nma 2/m 2/m 2/m

09.DE.05 Ferrogedrite []Fe5Al2Si6Al2O22(OH)2 P nma 2/m 2/m 2/m

09.DE.05 Gedrite []Mg5Al2Si6Al2O22(OH)2 P nma 2/m 2/m 2/m

09.DE.05 Ferroholmquistite [](Li2Fe3Al2)Si8O22(OH)2 P nma 2/m 2/m 2/m

09.DE.05 Holmquistite [](Li2Mg3Al2)Si8O22(OH)2 P nma 2/m 2/m 2/m

09.DE.05 Cummingtonite []Mg7Si8O22(OH)2 C 2/m 2/m

09.DE.05 Clinoferroholmquistite [](Li2Fe3Al2)Si8O22(OH)2 C 2/m 2/m

09.DE.05 Grunerite []Fe7Si8O22(OH)2 C 2/m 2/m

09.DE.05 Magnesiocummingtonite (Mg,Fe)7Si8O22(OH)2 C 2/m 2/m

09.DE.05 Manganogrunerite []Mn2Fe5Si8O22(OH) C 2/m 2/m

09.DE.05 Magnesioanthophyllite? (Mg,Fe)7Si8O22(OH)2 P nma 2/m 2/m 2/m

09.DE.05 Protomangano-ferro-anthophyllite! (Mn,Fe)2(Fe,Mg)5(Si4O11)2(OH)2 Pnmn 2/m 2/m 2/m

09.DE.05 Sodicgedrite NaMg6AlSi6Al2O22(OH)2 P nma 2/m 2/m 2/m

09.DE.05 Sodic-ferro-anthophyllite! NaFe7Si8O22(OH)2 P nma 2/m 2/m 2/m

09.DE.05 Sodic-ferrogedrite! NaFe6AlSi6Al2O22(OH)2 P nma 2/m 2/m 2/m

09.DE.05 Sodicanthophyllite NaMg7Si8O22(OH)2 P nma 2/m 2/m 2/m

09.DE.05 Permanganogrunerite! []Mn4(Fe)3(Si8O22)(OH)2 C 2/m 2/m

09.DE.05 Protoferro-anthophyllite! (Fe,Mn)2(Fe,Mg)5(Si4O11)2(OH)2 Pnmn 2/m 2/m 2/m

09.DE.05 Fluoro-sodic-pedrizite! NaLi2(Mg2Al2Li)S5Si8O22F2 C 2/m 2/m

09.DE.05 Sodic-ferri-ferropedrizite! NaLi2(Fe2Fe3)Si8O22(OH)2 C 2/m 2/m

09.DE.05 Manganocummingtonite Na(Na,Mn)2(Mg4,Fe)5Si8O22(OH)2 C 2/m 2/m

09.DE.05 Protoanthophyllite! (Mg,Fe)7Si8O22(OH)2 Pnmn 2/m 2/m 2/m

09.DE.05 Ferri-clinoferroholmquistite! []Li2(Fe2Fe3)Si8O22(OH)2 C 2/m 2/m

09.DE.05 Sodic-ferripedrizite! Na(LiNa)(Fe2Mg2Li)Si8O22(OH,F)2 C 2/m 2/m

09.DE.05 Ferripedrizite! NaLi2(Fe2Mg2Li)Si8O22(OH)2 C 2/m 2/m

Other Sodic-ferripedrizite Information

References:

NAME( MinRec, v 32, p 220) PHYS. PROP.(MinRec, v 32, p 220) OPTIC PROP.(MinRec, v 32, p 220)

See Also:

Links to other databases for Sodic-ferripedrizite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Sodic-ferripedrizite

Na(LiNa)(Fe+++2Mg2Li)Si8O22(OH,F)2
Dana No: 66.01.01.09 Strunz No: 09.DE.05
Locality:

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