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Magnesioclinoholmquistite Mineral Data

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General Magnesioclinoholmquistite Information

Help on Chemical  Formula: Chemical Formula: Li2(Mg,Fe++)3Al2Si8O22(OH)2
Help on Composition: Composition: Molecular Weight = 782.99 gm
   Lithium     1.77 %  Li    3.82 % Li2O
   Magnesium   6.21 %  Mg   10.30 % MgO
   Aluminum    6.89 %  Al   13.02 % Al2O3
   Iron        7.13 %  Fe    9.18 % FeO
   Silicon    28.70 %  Si   61.39 % SiO2
   Hydrogen    0.26 %  H     2.30 % H2O
   Oxygen     49.04 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Li2Mg2Fe2+Al2(Si8O22)(OH)2
Help on Environment: Environment: Crystals in a pegmatite. Dimorphous with magnesioholmquistite, forms a series with clinohomquistite and ferroclinoholmquistite.
Help on IMA Status: IMA Status: Discredited IMA (1997,2005)
Help on Locality: Locality: Unspecified locality in Siberia, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its composition, monoclinic crystal structure, and relationship with holmsquisite. Discredited as clinoholmquistite (1997). Clinohomsquisite discredited (2005).
Help on Synonym: Synonym: Discredited IMA 1997

Magnesioclinoholmquistite 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

Magnesioclinoholmquistite 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)= 2.97
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m

Physical Properties of Magnesioclinoholmquistite

Help on Cleavage: Cleavage: {???} Good
Help on Color: Color: Blue violet, Gray, Gray violet, Light blue.
Help on Density: Density: 3.02
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 5-6 - Between Apatite and Orthoclase

Optical Properties of Magnesioclinoholmquistite

Help on Optical Data: Optical Data: NCalc= 1.63 - from Gladstone-Dale relationship (KC = 0.212) where Ncalc=Dcalc*KC+1
NCalc= 1.64 - from Gladstone-Dale relationship (KC = 0.212) where Ncalc=Dmeas*KC+1

Calculated Properties of Magnesioclinoholmquistite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.94 gm/cc
note: Specific Gravity of Magnesioclinoholmquistite =2.97 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEMagnesioclinoholmquistite = 3.56 barns/electron
U=PEMagnesioclinoholmquistite x rElectron Density= 10.46 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Magnesioclinoholmquistite is Not Radioactive

Magnesioclinoholmquistite 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 Magnesioclinoholmquistite Information

Help on References: References: NAME( Dana8, CanMin 35:219, 90:732)
Help on See Also: See Also: Links to other databases for Magnesioclinoholmquistite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Ecole des Mines de Paris
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info

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Dana No: Strunz No: 09.DD.05





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