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Ferri-clinoholmquistite Mineral Data

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General Ferri-clinoholmquistite Information

Help on Chemical  Formula: Chemical Formula: [ ]Li2Mg3(Fe3+)2(Si8O22)(OH)2
Help on Composition: Composition: Molecular Weight = 849.26 gm
   Potassium   0.14 %  K     0.17 % K2O
   Sodium      1.98 %  Na    2.66 % Na2O
   Lithium     1.76 %  Li    3.78 % Li2O
   Calcium     0.19 %  Ca    0.26 % CaO
   Magnesium   3.46 %  Mg    5.74 % MgO
   Titanium    0.68 %  Ti    1.13 % TiO2
   Aluminum    0.64 %  Al    1.20 % Al2O3
   Zinc        0.15 %  Zn    0.19 % ZnO
   Iron       19.00 %  Fe   11.42 % FeO / 14.48 % Fe2O3
   Silicon    26.46 %  Si   56.60 % SiO2
   Hydrogen    0.19 %  H     1.68 % H2O
   Oxygen     44.42 %  O
   Fluorine    0.94 %  F     0.94 % F
                -   %   F    -0.40 % -O=F2    
             ______        ______ 
             100.00 %       99.86 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na0.43K0.03Li1.66Na0.3Ca0.04Fe3+1.54Fe2+1.35Mg1.21Li0.49Al0.2Ti0.12Zn0.02Si8O22 (OH)1.58F0.42
Help on Environment: Environment: Hydrothermal episyenitic bodies located in the east of the Pedriza Massif.
Help on IMA Status: IMA Status: Approved IMA 1998 (Dana # Added)
Help on Locality: Locality: East Pedriza Massif (Central System, Spain), Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: The name reflects its composition, monoclinic crystal structure, and relationship to holmquistite in accord with the nomenclature of Leake (1978a, 1978b)
Help on Synonym: Synonym: IMA1995-045

Ferri-clinoholmquistite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5308:1:0.2956
Help on Cell Dimensions: Cell Dimensions: a = 9.472, b = 17.844, c = 5.276, Z = 2; beta = 101.97° V = 872.35 Den(Calc)= 3.23
Help on Crystal System: 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/Io): 3.1(1)(310), 8.222(0.61)(110), 2.741(0.53)(330),1.433(0.46)(243), 4.458(0.19)(040),

Physical Properties of Ferri-clinoholmquistite

Help on Cleavage: Cleavage: {110} Perfect, {110} Perfect
Help on Color: Color: Black.
Help on Density: Density: 3.19
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Brittle - Splintery - Brittle fracture leaving splintery fragments.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: gray

Optical Properties of Ferri-clinoholmquistite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.03 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.042 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2178,KPDmeas= 0.2205,KC= 0.2272
Ncalc = 1.72 - 1.73
Help on Optical Data: Optical Data: Biaxial (+), a=1.699, b=1.703, g=1.708, bire=0.0090, 2V(Calc)=84, 2V(Meas)=72. Dispersion r < v.

Calculated Properties of Ferri-clinoholmquistite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.14 gm/cc
note: Specific Gravity of Ferri-clinoholmquistite =3.19 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEFerri-clinoholmquistite = 7.02 barns/electron
U=PEFerri-clinoholmquistite x relectron= 22.01 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 1.97 (Gamma Ray American Petroleum Institute Units)
Concentration of Ferri-clinoholmquistite per GRapi unit = 50.87 (%)

Estimated Radioactivity from Ferri-clinoholmquistite - barely detectable


Ferri-clinoholmquistite Classification

Help on  Dana Class: Dana Class: (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) Magnesiocummingtonite (Mg,Fe)7Si8O22(OH)2 C 2/m 2/m Cummingtonite []Mg7Si8O22(OH)2 C 2/m 2/m Grunerite []Fe7Si8O22(OH)2 C 2/m 2/m Permanganogrunerite! []Mn4(Fe)3(Si8O22)(OH)2 C 2/m 2/m Manganocummingtonite Na(Na,Mn)2(Mg4,Fe)5Si8O22(OH)2 C 2/m 2/m Manganogrunerite []Mn2Fe5Si8O22(OH) C 2/m 2/m Magnesioclinoholmquistite? Li2(Mg,Fe)3Al2Si8O22(OH)2 C 2/m 2/m Clinoholmquistite? [](Li2Mg3Al2)Si8O22(OH)2 C 2/m 2/m Clinoferroholmquistite [](Li2Fe3Al2)Si8O22(OH)2 C 2/m 2/m Ferri-clinoholmquistite! []Li2Mg3(Fe3)2(Si8O22)(OH)2 C 2/m 2/m Ferri-clinoferroholmquistite! []Li2(Fe2Fe3)Si8O22(OH)2 C 2/m 2/m Sodic-ferripedrizite! Na(LiNa)(Fe2Mg2Li)Si8O22(OH,F)2 C 2/m 2/m Ferripedrizite! NaLi2(Fe2Mg2Li)Si8O22(OH)2 C 2/m 2/m Sodic-ferri-ferropedrizite! NaLi2(Fe2Fe3)Si8O22(OH)2 C 2/m 2/m Fluoro-sodic-pedrizite! NaLi2(Mg2Al2Li)S5Si8O22F2 C 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.DD.05 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DD -Inosilicates with 2-periodic double chains, Si4O11; amphibole family
09.DD.05 Ferri-clinoholmquistite! []Li2Mg3(Fe3)2(Si8O22)(OH)2 C 2/m 2/m
09.DD.05 Clinoholmquistite? [](Li2Mg3Al2)Si8O22(OH)2 C 2/m 2/m
09.DD.05 Magnesiogedrite? (Mg,Fe)5Al2Si6Al2O22(OH)2 P nma 2/m 2/m 2/m
09.DD.05 Magnesioholmquistite Li2(Mg,Fe)3Al2Si8O22(OH)2 P nma 2/m 2/m 2/m
09.DD.05 Magnesioclinoholmquistite? Li2(Mg,Fe)3Al2Si8O22(OH)2 C 2/m 2/m

Other Ferri-clinoholmquistite Information

Help on References: References: NAME( AmMin 83:167) PHYS. PROP.(AmMin 83:167) OPTIC PROP.(Am.Min., 83:167)
Help on See Also: See Also: Links to other databases for Ferri-clinoholmquistite :
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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Print or Cut-and-Paste your Ferri-clinoholmquistite Specimen Label here :


[ ]Li2Mg3(Fe3+)2(Si8O22)(OH)2
Dana No: Strunz No: 09.DD.05





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