Zinnwaldite

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Zinnwaldite
Classificazione StrunzVIII/H.11-00
Formula chimicaKLiFe++Al(AlSi3)O10(F,OH)2
Proprietà cristallografiche
Sistema cristallinoMonoclino
Parametri di cellaa = 5.27, b = 9.187, c = 20.02, Z = 4
Gruppo puntuale2/m
Gruppo spazialeC 2/m
Proprietà fisiche
Densità3 g/cm³
Durezza (Mohs)3m5 - 4.0
FratturaFrastagliata
ColoreDa marrone chiaro giallo, al verde biancastro
Lucentezzavitrea, perlacea
Opacitàtrasparente
Strisciobianco
Diffusionecomune
Si invita a seguire lo schema di Modello di voce – Minerale

La zinnwaldite è la serie di minerali siderophyllite-polylithionite appartenente alla famiglia delle miche, la cui formula chimica è: KLiFeAl(AlSi3)O10(OH, F)2.

È stato identificato la prima volta nel 1845 a Zinnwald, Germania, da cui ha preso il nome.

Morfologia

Sezione vuotaQuesta sezione sull'argomento mineralogia è ancora vuota. Aiutaci a scriverla!

Origine e giacitura

Di origine pneumatolitica, è caratteristico dei filoni stanniferi come quelli di Zinnwald nell'Erzgebirge (Germania) e della Cornovaglia, e di alcune pegmatiti granitiche alcaline.

In Italia è stato trovato nel granito di Baveno e nei porfidi di Cuasso al Monte presso Varese.

Altri progetti

Collegamenti esterni

  Portale Mineralogia: accedi alle voci di Wikipedia che trattano di mineralogia

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