Thallium Chemistry: Thallium reduction by NaBH4

We showed you Diborane already and proofed it with a green flame. Then we also showed you Arsine and proofed it with a blue flame. We also used LiAlH4 and possible AlH3. Now we want to go a step further: Does that mean that we will always be able to make MHx compounds? And the answer is now. In this video, we react NaBH4 with Thallium nitrate. A gas is produced but as we burn it it is red (looks orange on cam). And Thallium flames are green. Even if you check that in the literature Thalliumhydride has onl