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New mineral species for Hungary in 1998

 

Sulphides

 

Bravoite (Ni, Fe)S2

Locality: Fertőrákos, Sopron Mountains (from drill core).

Description: inclusions in arsenopyrite and quartz. It forms anhedral grains (10-100 µm in diameter).

 

Greigite Fe3S4

Locality: Recsk ore mine, Mátra Mountains.

Description: it was detected in microscopic sizes in close association with pyrrhotite.

 

Sulphates

 

Montanite (BiO)2[TeO4] 2 H2O

Locality: Nyírjes area, near Gyöngyössolymos, Mátra Mountains.

Description: yellow-brown crusts and globular aggregates were identified by XRD analyses as weathering products of some Bi-tellurides.

 

Phosphates and arsenates

 

Carminite PbFe2(AsO4)2(OH)2

Locality: Meleg Hill, between Lovasberény and Nadap, Velence Mountains.

Description: carmine-red to reddish-brown needles and sprays (up to 2 mm) were identified in a small enargite occurrence, in association with segnitite, mimetite, and plumbojarosite.

 

Clinoclase Cu3AsO4(OH)3

Locality: Meleg Hill, between Lovasberény and Nadap, Velence Mountains.

Description: very rare, ink-blue crystals (up to 0.2 mm) with other arsenates.

 

Cornwallite Cu5(AsO4)2(OH)4

Locality: Meleg Hill, between Lovasberény and Nadap, Velence Mountains.

Description: rare, green micro-crusts and globular aggregates were identified in close association with cornubite.

 

Gartrellite Pb(Cu, Fe)2(AsO4, SO4)2(CO3, H2O)0.7

Locality: Meleg Hill, between Lovasberény and Nadap, Velence Mountains.

Description: bright yellow globular aggregates with 0.1-0.3 mm size, and crusts in cavities of quartzite.

 

Rhabdophane-(Ce) (Ce, La)PO4 H2O

Locality: gneisses and mica schists of the Sopron Mountains.

Description: rare accessory mineral in gneisses and mica schists. It forms grains up to 10 µm, and aggregates up to 0.1 mm.

 

Sampleite NaCaCu5(PO4)4Cl 5 H2O

Locality: on a dump of Rm-48 inclined shaft, Lahóca Hill, Recsk, Mátra Mountains.

Description: rare, sky-blue globular aggregates up to 0.5 mm.

 

Silicates

 

Ferropargasite NaCa2(Fe, Mg)4Al(Si6Al2)O22(OH)2

Locality: Bajdázó quarry, near Nógrád, Börzsöny Mountains.

Description: small phenocrysts in Miocene andesite according to microprobe analyses.

 

Katoite Ca3Al2(SiO4)3-x(OH)4x, x = 1.5-3

Locality: Csódi Hill, Dunabogdány, Visegrád Mountains.

Description: rarely occurs in serpentine xenoliths of dacite as minute (up to 0.5 mm) colourless octahedral crystals.

 

Sándor Szakáll

 

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