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Clinoholmquistite Mineral Data

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General Clinoholmquistite Information

Help on Chemical  Formula: Chemical Formula: [ ](Li2Mg3Al2)Si8O22(OH)2
Help on Composition: Composition: Molecular Weight = 794.83 gm
   Potassium   0.20 %  K     0.24 % K2O
   Sodium      1.30 %  Na    1.75 % Na2O
   Lithium     1.63 %  Li    3.52 % Li2O
   Calcium     1.31 %  Ca    1.83 % CaO
   Magnesium   5.90 %  Mg    9.79 % MgO
   Manganese   0.35 %  Mn    0.45 % MnO
   Aluminum    7.50 %  Al   14.17 % Al2O3
   Iron        5.13 %  Fe    6.15 % FeO /  0.50 % Fe2O3
   Silicon    28.27 %  Si   60.47 % SiO2
   Hydrogen    0.02 %  H     0.20 % H2O
   Oxygen     46.62 %  O
   Fluorine    1.77 %  F     1.77 % F
                -   %   F    -0.74 % -O=F2    
             ______        ______ 
             100.00 %      100.10 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na0.45Ca0.05K0.04Li1.79Ca0.21Al2.21Mg1.93Fe2+0.68Li0.08Mn2+0.05Fe3+0.05Si8O22.98 F0.74(OH)0.18
Help on Environment: Environment: Occurs at the inner contact with lithium pegmatite around oligoclase andesite. Discredited as a mixture of two distinct amphibole compositions, tremolite and a new amphibole end-mem ber, Fluoro-sodic-pedrizite,
Help on IMA Status: IMA Status: Discredited IMA 2005
Help on Locality: Locality: Tastyg spodumene deposit, Tuva, Siberia, Russia, Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its monoclinic crystal structure and relationship with holmsquisite. Approved IMA 1985, Discredited IMA 2005 as being fluoro-sodic-pedrizite.
Help on Synonym: Synonym: Discredited - IMA2004-002

Clinoholmquistite Image

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  Clinoholmquistite   Magnesioclinoholmquistite   Fluoro-sodic-pedrizite

Comments: Dark blue fibrous clinoholmquistite with radiating structure, variety magnesioclinoholmquistite. Clinoholmsquitite may be a new aphibole, fluoro-sodic-pedrizite..
Location: Near Murun, Republic of Sakha, Siberia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Clinoholmquistite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5496:1:0.2972
Help on Cell Dimensions: Cell Dimensions: a = 9.8, b = 17.83, c = 5.3, Z = 2; beta = 109.1° V = 875.11 Den(Calc)= 3.02
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): 7.93(1), 2.99(1), 2.7(1),1.39(0.9), 4.4(0.9), 1.61(0.8), 1.57(0.7), 3.47(0.5),

Physical Properties of Clinoholmquistite

Help on Cleavage: Cleavage: {110} Good, {110} Good
Help on Color: Color: Blue gray, Gray lilac.
Help on Density: Density: 3
Help on Diaphaneity: Diaphaneity: Transparent to 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: 5-6 - Between Apatite and Orthoclase
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Clinoholmquistite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.004 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.011 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2064,KPDmeas= 0.2078,KC= 0.2087
Ncalc = 1.63
Help on Optical Data: Optical Data: Biaxial (-), a=1.61, b=1.627, g=1.633, bire=0.0230, 2V(Calc)=60, 2V(Meas)=55-61.

Calculated Properties of Clinoholmquistite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.96 gm/cc
note: Specific Gravity of Clinoholmquistite =3.00 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEClinoholmquistite = 3.26 barns/electron
U=PEClinoholmquistite x relectron= 9.66 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 2.82 (Gamma Ray American Petroleum Institute Units)
Concentration of Clinoholmquistite per GRapi unit = 35.41 (%)

Estimated Radioactivity from Clinoholmquistite - barely detectable


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 Clinoholmquistite Information

Help on References: References: NAME( Dana8, AmMin 90:732) PHYS. PROP.(Dana8, AmMin 90:732) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Clinoholmquistite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Print or Cut-and-Paste your Clinoholmquistite Specimen Label here :


[ ](Li2Mg3Al2)Si8O22(OH)2
Dana No: Strunz No: 09.DD.05





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