Magnesioholmquistite Mineral Data

General Magnesioholmquistite Information

Chemical Formula:

Li2(Mg,Fe++)3Al2Si8O22(OH)2

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

Empirical Formula:

Li₂Mg₂Fe²⁺Al₂(Si₈O₂₂)(OH)₂

IMA Status:

Approved IMA 1978

Locality:

Link to MinDat.org Location Data.

Name Origin:

The name reflects its composition and relationship to holmquistite..

Magnesioholmquistite Image

Images:

Click Here for Larger Magnesioholmquistite Image

Magnesioholmquistite Holmquistite

Comments: Dark blue thin bladed crystals of holmquistite (magnesioholmquistite) in amphibolite.
Location: Uto, Sodermanland, Sweden. Scale: See Image.
© Rruff Database

Magnesioholmquistite Crystallography

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P nma

Physical Properties of Magnesioholmquistite

Cleavage:

{???} Good

Color:

Violet, Gray blue.

Hardness:

5-6 - Between Apatite and Orthoclase

Optical Properties of Magnesioholmquistite

Optical Data:

Calculated Properties of Magnesioholmquistite

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_{Magnesioholmquistite}= 3.56 barns/electron
U=PE_{Magnesioholmquistite} x rElectron Density= . barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Magnesioholmquistite is Not Radioactive

Magnesioholmquistite Classification

Dana Class:

66.01.02.09 (66)Inosilicate Double-Width Unbranched Chains, W=2

(66.01)with P=2 amphibole configuration

(66.01.02)Dana Group

66.01.02.01 Magnesioanthophyllite? (Mg,Fe)7Si8O22(OH)2 P nma 2/m 2/m 2/m

66.01.02.02 Anthophyllite []Mg7Si8O22(OH)2 P nma 2/m 2/m 2/m

66.01.02.02a Protoanthophyllite! (Mg,Fe)7Si8O22(OH)2 Pnmn 2/m 2/m 2/m

66.01.02.03 Ferro-anthophyllite []Fe7Si8O22(OH)2 P nma 2/m 2/m 2/m

66.01.02.03a Protoferro-anthophyllite! (Fe,Mn)2(Fe,Mg)5(Si4O11)2(OH)2 Pnmn 2/m 2/m 2/m

66.01.02.03b Protomangano-ferro-anthophyllite! (Mn,Fe)2(Fe,Mg)5(Si4O11)2(OH)2 Pnmn 2/m 2/m 2/m

66.01.02.04 Sodicanthophyllite NaMg7Si8O22(OH)2 P nma 2/m 2/m 2/m

66.01.02.04a Sodic-ferro-anthophyllite! NaFe7Si8O22(OH)2 P nma 2/m 2/m 2/m

66.01.02.05 Magnesiogedrite? (Mg,Fe)5Al2Si6Al2O22(OH)2 P nma 2/m 2/m 2/m

66.01.02.06 Gedrite []Mg5Al2Si6Al2O22(OH)2 P nma 2/m 2/m 2/m

66.01.02.07 Ferrogedrite []Fe5Al2Si6Al2O22(OH)2 P nma 2/m 2/m 2/m

66.01.02.07a Sodic-ferrogedrite! NaFe6AlSi6Al2O22(OH)2 P nma 2/m 2/m 2/m

66.01.02.08 Sodicgedrite NaMg6AlSi6Al2O22(OH)2 P nma 2/m 2/m 2/m

66.01.02.09 Magnesioholmquistite Li2(Mg,Fe)3Al2Si8O22(OH)2 P nma 2/m 2/m 2/m

66.01.02.10 Holmquistite [](Li2Mg3Al2)Si8O22(OH)2 P nma 2/m 2/m 2/m

66.01.02.11 Ferroholmquistite [](Li2Fe3Al2)Si8O22(OH)2 P nma 2/m 2/m 2/m

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 Magnesioholmquistite Information

See Also:

Links to other databases for Magnesioholmquistite :
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

Search for Magnesioholmquistite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Magnesioholmquistite :

A Bijoux Google Search for Magnesioholmquistite
Adam's Minerals Google Search for Magnesioholmquistite
Cape Minerals Google Search for Magnesioholmquistite
Dakota Matrix Minerals Google Search for Magnesioholmquistite
Excalibur Mineral Corp. Google Search for Magnesioholmquistite
Exceptional Minerals Google Search for Magnesioholmquistite
John Betts Fine Minerals Search for Magnesioholmquistite
McDougall Minerals Google Search for Magnesioholmquistite
Mineral News Website Link
Rock and Mineral Shows Google Search for Magnesioholmquistite
Weinrich Minerals, Inc. Google Search for Magnesioholmquistite

Ask about Magnesioholmquistite 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 Magnesioholmquistite Specimen Label here :

Magnesioholmquistite

Li2(Mg,Fe++)3Al2Si8O22(OH)2
Dana No: 66.01.02.09 Strunz No: 09.DD.05
Locality:

Notes: