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Thanks Apap. A glass shard was analysed at the Nanovision Centre, Queen Mary University of London in 2009, using an Electron Microscopic technique called EDX. And the same shard at Johnsson Matthey by electron probe microanalysis, Both showed it to be almost pure SiO2 glass, with no additives or network modifiers.

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The amazing Hongshan Natural Glass Tubes 3684 drdavidanderson 08-Feb-18 18:08
Re: The amazing Hongshan Natural Glass Tubes 587 MDaines 09-Feb-18 11:28
Re: The amazing Hongshan Natural Glass Tubes 569 drdavidanderson 09-Feb-18 15:24
Re: The amazing Hongshan Natural Glass Tubes 591 michael seabrook 11-Feb-18 21:50
Re: The amazing Hongshan Natural Glass Tubes 565 drdavidanderson 12-Feb-18 08:32
Re: The amazing Hongshan Natural Glass Tubes 555 Apap 13-Feb-18 01:04
Re: The amazing Hongshan Natural Glass Tubes 565 drdavidanderson 13-Feb-18 05:40
Re: The amazing Hongshan Natural Glass Tubes 543 Apap 13-Feb-18 22:38
Re: The amazing Hongshan Natural Glass Tubes 543 Wheeler 13-Feb-18 12:15
Re: The amazing Hongshan Natural Glass Tubes 525 drdavidanderson 13-Feb-18 12:38
Re: The amazing Hongshan Natural Glass Tubes 531 Wheeler 13-Feb-18 13:05
Re: The amazing Hongshan Natural Glass Tubes 543 drdavidanderson 13-Feb-18 14:31
Re: The amazing Hongshan Natural Glass Tubes 535 Wheeler 15-Feb-18 03:22
Tubes and ancient themes. . . 554 Reagent 15-Feb-18 07:02
. . . Forgot to ask . . 549 Reagent 15-Feb-18 07:59
Re: . . . Forgot to ask . . 515 drdavidanderson 15-Feb-18 08:16
Fine lathing technique??? 558 Reagent 15-Feb-18 08:43
Re: Fine lathing technique??? 515 drdavidanderson 15-Feb-18 08:58
Re: The amazing Hongshan Natural Glass Tubes 521 Wheeler 15-Feb-18 11:12
Re: The amazing Hongshan Natural Glass Tubes 527 drdavidanderson 15-Feb-18 11:25
Re: The amazing Hongshan Natural Glass Tubes 532 Wheeler 15-Feb-18 11:44
Re: The amazing Hongshan Natural Glass Tubes 564 jazzmumbles 15-Feb-18 13:01
Re: The amazing Hongshan Natural Glass Tubes 761 Wheeler 19-Feb-18 02:23
Re: The amazing Hongshan Natural Glass Tubes 537 drdavidanderson 19-Feb-18 13:55
Re: The amazing Hongshan Natural Glass Tubes 522 Wheeler 20-Feb-18 20:19
Re: The amazing Hongshan Natural Glass Tubes 622 drdavidanderson 20-Feb-18 18:27
Re: The amazing Hongshan Natural Glass Tubes 600 Wheeler 20-Feb-18 20:24
Re: The amazing Hongshan Natural Glass Tubes 537 drdavidanderson 20-Feb-18 21:21
Re: The amazing Hongshan Natural Glass Tubes 587 Wheeler 20-Feb-18 21:44
Re: The amazing Hongshan Natural Glass Tubes 668 Wheeler 21-Feb-18 11:51
Re: The amazing Hongshan Natural Glass Tubes 786 pgalaxy 26-May-18 11:25


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