Ferri-clinoferroholmquistite Mineral Data

General Ferri-clinoferroholmquistite Information

Chemical Formula:

[ ]Li2(Fe+++2Fe++3)Si8O22(OH)2

Composition:

Molecular Weight = 848.25 gm

Sodium 0.98 % Na 1.32 % Na₂O

Lithium 1.78 % Li 3.84 % Li₂O

Magnesium 3.04 % Mg 5.04 % MgO

Aluminum 0.83 % Al 1.56 % Al₂O₃

Iron 21.27 % Fe 13.13 % FeO / 15.81 % Fe₂O₃

Silicon 26.49 % Si 56.67 % SiO₂

Hydrogen 0.21 % H 1.90 % H₂O

Oxygen 44.87 % O

Fluorine 0.54 % F 0.54 % F

- % F -0.23 % -O=F₂

______ ______

100.00 % 99.58 % = TOTAL OXIDE

Empirical Formula:

Na_0.28Li_1.9Na_0.08Fe³⁺_1.68Fe²⁺_1.55Mg_1.06Li_0.28Al_0.26Si₈O₂₂(OH)_1.79F_0.24

Environment:

Metamorphic episyenites (deslicification and albitizaton of a cordierite-bearing porphyritic granite). New Group 5 amphibole classification.

IMA Status:

Approved IMA 2003 (Dana # Added)

Locality:

Pedriza Massif, Sierra del Guadarrama, Spain. Link to MinDat.org Location Data.

Name Origin:

Named for Johan Holmquist (1866-1946) and the Fe++ and Fe+++ clinoamphiboles.

Synonym:

IMA2001-066

Ferri-clinoferroholmquistite Crystallography

Axial Ratios:

a:b:c =0.5286:1:0.2962

Cell Dimensions:

a = 9.462, b = 17.898, c = 5.302, Z = 2; beta = 101.88° V = 878.67 Den(Calc)= 3.21

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): 8.224(1)(110), 2.717(0.69)(151), 3.042(0.54)(310),2.492(0.32)(202), 3.42(0.3)(131), 4.474(0.3)(040), 1.389(0.27), 2.165(0.21)(261), 2.586(0.2)(061),

Physical Properties of Ferri-clinoferroholmquistite

Cleavage:

{110} Good, {110} Good

Color:

Black.

Diaphaneity:

Translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Luster:

Vitreous (Glassy)

Streak:

gray

Optical Properties of Ferri-clinoferroholmquistite

Optical Data:

Biaxial (?)

NCalc= 1.73 - from Gladstone-Dale relationship (KC = 0.2267) where Ncalc=Dcalc*KC+1

Calculated Properties of Ferri-clinoferroholmquistite

Electron Density:

Bulk Density (Electron Density)=3.15 gm/cc
note: Specific Gravity of Ferri-clinoferroholmquistite =3.21 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_{Ferri-clinoferroholmquistite}= 7.45 barns/electron
U=PE_{Ferri-clinoferroholmquistite} x rElectron Density= 23.50 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ferri-clinoferroholmquistite is Not Radioactive

Ferri-clinoferroholmquistite Classification

Dana Class:

66.01.01.08b (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 Ferri-clinoferroholmquistite Information

References:

NAME( CanMin, v 41, p 1345) PHYS. PROP.(CanMin, v 41, p 1345) OPTIC PROP.(CanMin, v 41, p 1345)

See Also:

Links to other databases for Ferri-clinoferroholmquistite :
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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Ferri-clinoferroholmquistite

[ ]Li2(Fe+++2Fe++3)Si8O22(OH)2
Dana No: 66.01.01.08b Strunz No: 09.DE.05
Locality:

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