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PIRITE
Introduzione:
La pirite (Py) è un minerale molto comune
composto principalmente da disolfuro di
ferro. Il suo nome, di origine greca, proviene
da "πῦρ" "pyr", che significa fuoco. Infatti,
questo minerale, se colpito con un metallo,
sprigiona scintille.
Nella parte superficiale dei suoi giacimenti la
pirite si altera spontaneamente, dando
origine a prodotti limonitici, che costituiscono
il cosiddetto cappello di ferro. Alterandosi, la
pirite aiuta la trasformazione di altri solfuri
più resistenti e può produrre acido solforico.
Proprietà:
 Classi di Minerali: Solfuro
 Gruppo cristallino: Monometrico
 Sistema cristallino: Monoclino
 Formula chimica: FeS2
 Durezza : 6-6.5
STRUTTURA:
●È principalmente di origine magmatica
●Si presenta sotto forma di cristalli di abito
vario, di colore giallo , con lucentezza
metallica. I suoi cristalli sono fragili
e presentano fratture.
●Le forme più comuni sono il cubo con la
striatura triglifa.
●La pirite è il più abbondante dei solfuri
naturali ed è uno dei minerali del ferro
più diffusi.
Dove si trova?
●La pirite viene estratta in giacimenti sparsi in tutto il mondo. Tra questi rientrano quelli
presenti in Spagna, Italia, Giappone, Stati Uniti, Norvegia, Cipro, Russia.
●In Canada, Alaska, Australia e Brasile si trovano invece giacimenti in cui è presente
pirite aurifera (che contiene oro).
Utilizzo:
●La pirite veniva utilizzata in passato
come prodotto di partenza per la
produzione dell'acido solforico e per
l'estrazione dello zolfo.
●Le ceneri di pirite trovavano
impiego in campo siderurgico.
Nella metafisica:
●Nel mondo metafisico si crede che la
pirite sia una pietra protettiva che
attinge energia dalla Terra.
●In amore, la pirite proteggerebbe da
emozioni e pensieri negativi.
Tarquini Alessia
4D

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pirite_TarquiniAlessia-3.pdf

  • 2. Introduzione: La pirite (Py) è un minerale molto comune composto principalmente da disolfuro di ferro. Il suo nome, di origine greca, proviene da "πῦρ" "pyr", che significa fuoco. Infatti, questo minerale, se colpito con un metallo, sprigiona scintille. Nella parte superficiale dei suoi giacimenti la pirite si altera spontaneamente, dando origine a prodotti limonitici, che costituiscono il cosiddetto cappello di ferro. Alterandosi, la pirite aiuta la trasformazione di altri solfuri più resistenti e può produrre acido solforico.
  • 3. Proprietà:  Classi di Minerali: Solfuro  Gruppo cristallino: Monometrico  Sistema cristallino: Monoclino  Formula chimica: FeS2  Durezza : 6-6.5
  • 4. STRUTTURA: ●È principalmente di origine magmatica ●Si presenta sotto forma di cristalli di abito vario, di colore giallo , con lucentezza metallica. I suoi cristalli sono fragili e presentano fratture. ●Le forme più comuni sono il cubo con la striatura triglifa. ●La pirite è il più abbondante dei solfuri naturali ed è uno dei minerali del ferro più diffusi.
  • 5. Dove si trova? ●La pirite viene estratta in giacimenti sparsi in tutto il mondo. Tra questi rientrano quelli presenti in Spagna, Italia, Giappone, Stati Uniti, Norvegia, Cipro, Russia. ●In Canada, Alaska, Australia e Brasile si trovano invece giacimenti in cui è presente pirite aurifera (che contiene oro).
  • 6. Utilizzo: ●La pirite veniva utilizzata in passato come prodotto di partenza per la produzione dell'acido solforico e per l'estrazione dello zolfo. ●Le ceneri di pirite trovavano impiego in campo siderurgico.
  • 7. Nella metafisica: ●Nel mondo metafisico si crede che la pirite sia una pietra protettiva che attinge energia dalla Terra. ●In amore, la pirite proteggerebbe da emozioni e pensieri negativi.