Silicate minerals#Inosilicates

As chain silicates ( inosilicates ) is called silicates, the silicate anions contain endless chains or ribbons of corner-sharing SiO4 tetrahedra. At the Department of silicates include major groups of rock-forming minerals such as pyroxene and amphibole that.

The linear structure of the silicate chains is reflected in the properties of the chain silicates. The crystals are of low symmetry, usually triclinic, monoclinic or orthorhombic but never cubic. Their shape is often prismatic to acicular stretched in the direction of the silicate chains. The cleavage is in the direction of the silicate chains usually very good.

Amphibole

Sapphirine

Xonotlite (white) and Inesit (reddish brown)

Prehnite

Classification

Silicate classification according to Liebau

The structural Silikatlassifikation of Liebau divided inosilicates the basis of the structure of silicate chains according to the following criteria:

Periodicity:

It indicates how many chain links silicate (SiO4 - tetrahedron ) repeats the structure of the chain. The periodicity of natural Inosilikaten is usually small and is 2 ( pyroxenes, amphiboles ) or 3 (eg wollastonite ). The largest periodicity found so far is 14 ( Liebauit ).

Unbranched dreier single chain of wollastonite

Unbranched four single chain of Haradait

Unbranched five single chain of Rhodonite

Unbranched six single chain of Stokesit

Unbranched sevens single chains of Pyroxferroite

Unbranched Twelve single chain of the Alamo Site

Multiplicity:

It specifies how many chains are linked to one another to form strips. The multiplicity is usually at 1 (eg pyroxenes ) or 2 (eg amphibole ). In principle, arbitrarily high multiplicities are possible and there is a smooth transition with increasing Kettenmultiplizität to the layer silicates. For example, the structurally similar construction minerals of the pyroxene, amphibole, Chesterit, Jimthompsonit and biotite are summarized in the polysomatic series of Biopyribole.

Unbranched two double chain of amphibole ( tremolite )

Unbranched two triple chains of Jimthompsonit

Mixed unbranched twin double and triple chains in Chesterit

Branching:

It indicates whether a branch off the silicate chain more SiO4 tetrahedra. A distinction is made between open and cyclic branched branched silicates silicates, in which the branching of the chain SiO4 tetrahedra form closed rings.

Cyclic, branched eight single chain of Pellyit

Mixed silicate anions:

Chain silicates may contain chains with different structure or more isolated silicate anions.

Strunz

The 9th edition of Strunz 's Mineralogical tables is based on the classification of silicate F. Liebau and divided the Department of inosilicates (09 D) primarily according to the periodicity of the chains and then after the Kettenmultiplizität and branching, and finally to the mineral composition.

09 DA inosilicates 2-slot single chains, Si2O6, Pyroxenfamilie: chain silicates with unbranched chains of periodicity 2 and multiplicity 1

9.DA.05: orthopyroxenes
9.DA.10: clinopyroxene with space group P 21 / c
9.DA.15: clinopyroxene Ca
9.DA.20: clinopyroxene Ca -Na
9.DA.25: clinopyroxene Na
9.DA.30: Li pyroxenes

09 DB inosilicates 2-slot single chains, Si2O6, pyroxene - related minerals:

9.DB.05 Karpholith Group
9.DB.10 Loren Zenit Group
9.DB.15 Lintisit Group
9.DB.20 Kukisvumit Group
9.DB.25 vinogradovite Group
9.DB.30 Nchwaningit Group
9.DB.35 Plancheite Group
9.DB.40 Shattuckit Group
9.DB.45 Aerinit

09 DC inosilicates 2er with branched single chains, Si2O6 2SiO3: Chain Silicates with branched chains of periodicity 2 and multiplicity 1

9.DC.05 Astrophyllite Group

09 DD inosilicates of 2 with double chains, Si4O11, Amphibolfamilie: Orthoamphibole chain silicates with unbranched chains of periodicity 2 and the multiplicity 2

9.DD.05 Orthoamphibole

09 DE inosilicates of 2 with double chains, Si4O11, Amphibolfamilie: Klinoamphibole chain silicates with unbranched chains of periodicity 2 and the multiplicity 2

9.DE.05
9.DE.10 amphiboles: Ca
9.DE.15 amphiboles: Ca > Na
9.DE.20
9.DE.25 amphiboles: Alkali

09 DF inosilicates 2er with multiple chains: chain silicates with chains of periodicity 2 and multiplicities > 2

9.DF.05: Chesterit, Jimthompsonit
9.DF.15 Ershovit Group
9.DF.20 Tvedalit Group
9.DF.25 Bavenit Group
9.DF.30 Bigcreekit Group

09 DG inosilicates with 3 single and multiple chains: chain silicates with chains of periodicity 3 and different multiplicity.

9.DG.05 wollastonite group
9.DG.10 tobermorite group
9.DG.15 Foshagite Group
9.DG.20 Jennit Group
9.DG.25 Umbit Group
9.DG.30 Sørensenit
9.DG.35 Xonotlite Group
9.DG.40 hillebrandite Group
9.DG.45 Zorite Group
9.DG.50 Haineaultit Group
9.DG.55 Epididymit Group
9.DG.60 Eudidymit Group
9.DG.65 Elpidite Group
9.DG.70 Fenaksit, Manaksit
9.DG.75 Tinaksit Group
9.DG.80 canasite Group
9.DG.85 Miserit Group
9.DG.90 Frankamenit Group
9.DG.95 Yuksporit Group

09 DH inosilicates with a 4 single chains, Si4O12: chain silicates with chains of 4 and periodicity of multiplicity 1

9.DH.05 Leukophan Group
9.DH.10 Ohmilith Group
9.DH.15 Haradait Group
9.DH.20 Batisit Group
9.DH.25 Taikanit Group
9.DH.30 Krauskopfit Group
9.DH.35 Gageit Group
9.DH.40 Aenigmatit Group
9.DH.45 sapphirine - group
9.DH.50 Khmaralith Group
9.DH.55 Surinamit Group
9.DH.60 Deerit Group
9.DH.65 Howieit Group
9.DH.70 Johninnesit Group
9.DH.75 Agrellit Group

09 DJ inosilicates of 4 with double and triple chains: chain silicates with chains of 4 and periodicity of multiplicity 2 or 3

9.DJ.05 Narsarsukit Group
9.DJ.10 Laplandit - (Ce)
9.DJ.15 Caysichit - (Y)
9.DJ.20 Seidit - (Ce)
9.DJ.25 Carlosturanit Group
9.DJ.30 Jonesit Group

09 DK inosilicates with 5er single chains: chain silicates with chains of periodicity 5 and of multiplicity 1

9.DK.05 rhodonite group
9.DK.10 Santaclarait Group
9.DK.15 Saneroit Group
9.DK.20

09 DL inosilicates with 5 Series double chains, Si10O28: chain silicates with chains of periodicity 5 and the multiplicity 2

9.DL.05 Inesit Group
9.DL.10 Piergorite - (Ce)

09 DM inosilicates with 6 single chains: chain silicates with chains of 6 and periodicity of multiplicity 1

9.DM.05 Stokesit Group
9.DM.10 Hilairit Group
9.DM.15 Gaidonnayit Group
9.DM.20 Chkalovite Group
9.DM.30 Revdit Group
9.DM.35 Scheuchzerit Group
9.DM.40 Terskit Group

09 DN inosilicates with 6 double chains: chain silicates with chains of 6 and periodicity of multiplicity 2

9.DN.05 Tuhualith Group
9.DN.10 Semenovit - (Ce)
9.DN.15 Ashcroftin - (Y)

09 DO inosilicates with 7 Series, 8, 10, 12er or 14er chains:

9.DO.05 Pyroxmangit Group
9.DO.10 Pellyit Group
9.DO.15 nordIT Group
9.DO.20 Alamosit Group
9.DO.25 Liebauit Group

09 DP transition structures by chains and layer silicates:

9.DP.10 Chiavennit Group
9.DP.15 Leukosphenit Group
9.DP.20 prehnite - group
9.DP.25 Amstallit Group
9.DP.30 Kvanefjeldit Group
9.DP.35 Lemoynit Group
9.DP.40 Altisit Group

09 DQ Modular chain framework structures:

9.DQ.05 Fukalit

09 DX Unknown:

09.DX.00 Tanohatait
09.DX.00 Punkaruaivit
09.DX.00 Yegorovit
09.DX.00 IMA2009 -009
09.DX.00 IMA2008 -070
09.DX.00 IMA2007 -015
09.DX.00 IMA2009 -012
09.DX.00 Plumalsit
09.DX.00 hypersthene?
09.DX.00 Grossmanit
09.DX.00 IMA2009 -010

Dana

The widespread in Anglo-Saxon classification of Dana breaks down the chain silicates initially at its multiplicity and secondarily according to the periodicity of the chains.

Lorenzenite Shattuckite Aerinite Jennite Aenigmatite Agrellite List of minerals

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