jafa5 Posted February 4, 2020 Report Share Posted February 4, 2020 I have a few rock quarries an hour or so from home that extract Syenite for road construction, but the guys I've spoken to on the phone don't know if its nephaline syenite, to be fair they just called it rock and had to check if it was Syenite. I'm just waiting on time off work to run down and pick up a trailer load of dust to test, but in the mean time... Does anyone know what the effects would be in a clay body or glaze if its Syenite without a Nepheline component? A reduced amount of feldspar minerals? Cheers, Liam Link to comment Share on other sites More sharing options...
liambesaw Posted February 4, 2020 Report Share Posted February 4, 2020 18 minutes ago, jafa5 said: I have a few rock quarries an hour or so from home that extract Syenite for road construction, but the guys I've spoken to on the phone don't know if its nephaline syenite, to be fair they just called it rock and had to check if it was Syenite. I'm just waiting on time off work to run down and pick up a trailer load of dust to test, but in the mean time... Does anyone know what the effects would be in a clay body or glaze if its Syenite without a Nepheline component? A reduced amount of feldspar minerals? Cheers, Liam I would think a syenite would be fairly similar to neph sy but more feldsparish since it has up to 10% quartz, whereas neph sy is supposed to be quite low in quartz. Maybe you can get an analysis done so you can use glaze calculation software to substitute it into recipes. Link to comment Share on other sites More sharing options...
curt Posted February 4, 2020 Report Share Posted February 4, 2020 Also, you may want to get their specification of “dust” before loading up the trailer. My experience is that what you and I call dust may not be what they call dust... Link to comment Share on other sites More sharing options...
jafa5 Posted February 4, 2020 Author Report Share Posted February 4, 2020 I've sent an email this morning and requested an analysis sheet (with an example), fingers crossed. Rocky dust is ok Curt, I have a ball mill to make it into a fine powder. Link to comment Share on other sites More sharing options...
jafa5 Posted February 10, 2020 Author Report Share Posted February 10, 2020 I was lucky enough to get some time with one of the geotech guys on site and they noted that its unlikely to have nephaline as a component from the Coromandel area (New Zealand) so substitutions would need to be made using a local feldspar - he is now finding me a local source of feldspar or feldpathic sand that might do the job :) Link to comment Share on other sites More sharing options...
liambesaw Posted February 10, 2020 Report Share Posted February 10, 2020 1 hour ago, jafa5 said: I was lucky enough to get some time with one of the geotech guys on site and they noted that its unlikely to have nephaline as a component from the Coromandel area (New Zealand) so substitutions would need to be made using a local feldspar - he is now finding me a local source of feldspar or feldpathic sand that might do the job That's awesome! Link to comment Share on other sites More sharing options...
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