Ferri-clinoferroholmquistite Mineral Data

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

Search for Ferri-clinoferroholmquistite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

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 - PrismaticH-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),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Oberti R , Camara F , Caballero J M , Ottolini L , The Canadian Mineralogist , 41 (2003) p.1345-1354, Sodic-ferri-ferropedrizite and ferri-clinoferroholmquistite: mineral data and, degree of order of the A-site cations in Li-rich amphiboles, Sequence number in the CNR-IGG database: SEQ 1043

Physical Properties of Ferri-clinoferroholmquistite

Cleavage:

[110] Good, [110] Good

Color:

Black.

Diaphaniety:

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 (?)

Calculated Properties of Ferri-clinoferroholmquistite

Electron Density:

r_electron=3.15 gm/cc
note: r_{Ferri-clinoferroholmquistite}=3.21 gm/cc.

Fermion Index

Fermion Index = 0.02146
Boson Index = 0.97854

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Ferri-clinoferroholmquistite is Not Radioactive

Ferri-clinoferroholmquistite Classification

Dana Class:

66.1.1.8b (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.07-90 VIII - Silicates

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

VIII/F.07 - Amphibole group, Magnesiocummingtonite - Ferroclinoholmquistite series

VIII/F.07-10 Magnesiocummingtonite (Mg,Fe)7Si8O22(OH)2 C 2/m 2/m

VIII/F.07-20 Cummingtonite []Mg7Si8O22(OH)2 C 2/m 2/m

VIII/F.07-30 Grunerite []Fe7Si8O22(OH)2 C 2/m 2/m

VIII/F.07-40 Manganocummingtonite Na(Na,Mn)2(Mg4,Fe)5Si8O22(OH)2 C 2/m 2/m

VIII/F.07-50 Manganogrunerite []Mn2Fe5Si8O22(OH) C 2/m 2/m

VIII/F.07-55 Permanganogrunerite! []Mn4(Fe)3(Si8O22)(OH)2 C 2/m 2/m

VIII/F.07-60 Magnesioclinoholmquistite? Li2(Mg,Fe)3Al2Si8O22(OH)2 C 2/m 2/m

VIII/F.07-70 Clinoholmquistite? [](Li2Mg3Al2)Si8O22(OH)2 C 2/m 2/m

VIII/F.07-80 Clinoferroholmquistite [](Li2Fe3Al2)Si8O22(OH)2 C 2/m 2/m

VIII/F.07-90 Ferri-clinoferroholmquistite []Li2(Fe2Fe3)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 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

Search for Ferri-clinoferroholmquistite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Ferri-clinoferroholmquistite :
AA Mineral Specimens
A-Rocks Auction
Adams Minerals
B and L Minerals
Dakota Matrix
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Minernet.it
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Ferri-clinoferroholmquistite Mineral Data :

Ask about Ferri-clinoferroholmquistite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Ferri-clinoferroholmquistite Specimen Label here :

Ferri-clinoferroholmquistite

[ ]Li2(Fe+++2Fe++3)Si8O22(OH)2
Dana No: 66.1.1.8b Strunz No: VIII/F.07-90
Locality:

Notes: