Nikolay Tumanov
@ntumanovxray.bsky.social
Crystallographer at UNamur, SC and PXRD. Structures and 3D-printing. Sometime 3D-printing of the structures. Chief Scientific Officer at GingerBread Instruments
Yep, pseudo-orthorhombic cell, exactly what I need from powder diffraction... And no 21 axis in the structure.
#crystallography #chemchat
#crystallography #chemchat
November 25, 2025 at 2:08 PM
Yep, pseudo-orthorhombic cell, exactly what I need from powder diffraction... And no 21 axis in the structure.
#crystallography #chemchat
#crystallography #chemchat
They say that healing crystals do not exist in nature, but just look on names of these #minerals :
Pharmacoalumite
Pharmacolite
Pharmacosiderite
Pharmazincite
P. S. Do not try to eat them...
Pharmacoalumite
Pharmacolite
Pharmacosiderite
Pharmazincite
P. S. Do not try to eat them...
November 22, 2025 at 10:18 PM
They say that healing crystals do not exist in nature, but just look on names of these #minerals :
Pharmacoalumite
Pharmacolite
Pharmacosiderite
Pharmazincite
P. S. Do not try to eat them...
Pharmacoalumite
Pharmacolite
Pharmacosiderite
Pharmazincite
P. S. Do not try to eat them...
Yep, I know exact which pictures you mean. And no idea where to find it now...
Help me, #chemsky, you're my only hope.
Years ago, on the other place, some people posted gorgeous before-and-after pictures of actionoid organometallic crystals showing rapid radiation damage. Does anyone know where to find them so I can wow my students?
Years ago, on the other place, some people posted gorgeous before-and-after pictures of actionoid organometallic crystals showing rapid radiation damage. Does anyone know where to find them so I can wow my students?
November 20, 2025 at 8:28 AM
Yep, I know exact which pictures you mean. And no idea where to find it now...
I introduce our fresh PhD student to the term “deliquescence”.
Blue curve - fast PXRD measurement of a sample; black curve - longer measurement of “Powder” XRD. Said “powder” after measurement.
Ok, it means that next point of our program is “how to do PXRD of an air-sensitive sample”
#chemchat
Blue curve - fast PXRD measurement of a sample; black curve - longer measurement of “Powder” XRD. Said “powder” after measurement.
Ok, it means that next point of our program is “how to do PXRD of an air-sensitive sample”
#chemchat
November 18, 2025 at 10:26 PM
I introduce our fresh PhD student to the term “deliquescence”.
Blue curve - fast PXRD measurement of a sample; black curve - longer measurement of “Powder” XRD. Said “powder” after measurement.
Ok, it means that next point of our program is “how to do PXRD of an air-sensitive sample”
#chemchat
Blue curve - fast PXRD measurement of a sample; black curve - longer measurement of “Powder” XRD. Said “powder” after measurement.
Ok, it means that next point of our program is “how to do PXRD of an air-sensitive sample”
#chemchat
Ah, and if you need a DYI version of it, ask @vsaggiomo.bsky.social, @drheaddamage.bsky.social and co.
www.beilstein-journals.org/bjnano/artic...
www.beilstein-journals.org/bjnano/artic...
November 18, 2025 at 8:35 AM
Ah, and if you need a DYI version of it, ask @vsaggiomo.bsky.social, @drheaddamage.bsky.social and co.
www.beilstein-journals.org/bjnano/artic...
www.beilstein-journals.org/bjnano/artic...
Reposted by Nikolay Tumanov
In the spirit of #ChemChat, here is one of my favourite bits of physical chemistry out in the real world: the 4th century Roman Lycurgus Cup.
Green in reflection, red in transmission, due to gold/silver nanoparticles in the glass, I finally got to see it for real a few weeks ago. Beautiful.
Green in reflection, red in transmission, due to gold/silver nanoparticles in the glass, I finally got to see it for real a few weeks ago. Beautiful.
November 17, 2025 at 2:58 PM
In the spirit of #ChemChat, here is one of my favourite bits of physical chemistry out in the real world: the 4th century Roman Lycurgus Cup.
Green in reflection, red in transmission, due to gold/silver nanoparticles in the glass, I finally got to see it for real a few weeks ago. Beautiful.
Green in reflection, red in transmission, due to gold/silver nanoparticles in the glass, I finally got to see it for real a few weeks ago. Beautiful.
Reposted by Nikolay Tumanov
I've started research on historic (preWW2) women who worked on volcanology/magmatic rocks. This includes anyone who was traveling to and writing about/observing/drawing/engaging with the landscape in myriad ways.
I'm building a list for further investigation. Will share soon! Any tip offs welcome!
I'm building a list for further investigation. Will share soon! Any tip offs welcome!
November 16, 2025 at 8:09 PM
I've started research on historic (preWW2) women who worked on volcanology/magmatic rocks. This includes anyone who was traveling to and writing about/observing/drawing/engaging with the landscape in myriad ways.
I'm building a list for further investigation. Will share soon! Any tip offs welcome!
I'm building a list for further investigation. Will share soon! Any tip offs welcome!
Hungarian mineralogist Andor von Semsey (1833–1923) has three minerals named after him. One, Semseyite, named after his surname and _two_ after his first name: Quatrandorite and Senandorite.
#mineralnames #mineral
#mineralnames #mineral
November 16, 2025 at 8:06 PM
Hungarian mineralogist Andor von Semsey (1833–1923) has three minerals named after him. One, Semseyite, named after his surname and _two_ after his first name: Quatrandorite and Senandorite.
#mineralnames #mineral
#mineralnames #mineral
#Australia, I have so many questions:
Why would you call something in Australia as Polar Bear peninsula?
There is (almost) no polar bears in Australia.
It is even not a proper peninsula for most of the year - you know, lack of water.
And last but not least, it is clearly a meerkat.
Why would you call something in Australia as Polar Bear peninsula?
There is (almost) no polar bears in Australia.
It is even not a proper peninsula for most of the year - you know, lack of water.
And last but not least, it is clearly a meerkat.
November 16, 2025 at 7:12 PM
#Australia, I have so many questions:
Why would you call something in Australia as Polar Bear peninsula?
There is (almost) no polar bears in Australia.
It is even not a proper peninsula for most of the year - you know, lack of water.
And last but not least, it is clearly a meerkat.
Why would you call something in Australia as Polar Bear peninsula?
There is (almost) no polar bears in Australia.
It is even not a proper peninsula for most of the year - you know, lack of water.
And last but not least, it is clearly a meerkat.
It is year 2025 and still my insurance website is not using parsing for input fields, like removing spaces from account number....
November 16, 2025 at 11:16 AM
It is year 2025 and still my insurance website is not using parsing for input fields, like removing spaces from account number....
I discovered recently that among various employee's advantages from our university, we have discount in a vinery and in a escargotière a.k.a. snail farm. Also, you can take your own tractor and a chainsaw and collect firewood in the university's forest.
November 15, 2025 at 10:18 AM
I discovered recently that among various employee's advantages from our university, we have discount in a vinery and in a escargotière a.k.a. snail farm. Also, you can take your own tractor and a chainsaw and collect firewood in the university's forest.
After a long series of events I need a new wok pan.
So, a question to #ChemistsWhoCook and #chemchat - do you have a recommendation for a pan with non-stick coating, but without PFAS? The one that is really non-stick and holds reasonable time?
So, a question to #ChemistsWhoCook and #chemchat - do you have a recommendation for a pan with non-stick coating, but without PFAS? The one that is really non-stick and holds reasonable time?
November 14, 2025 at 6:38 PM
After a long series of events I need a new wok pan.
So, a question to #ChemistsWhoCook and #chemchat - do you have a recommendation for a pan with non-stick coating, but without PFAS? The one that is really non-stick and holds reasonable time?
So, a question to #ChemistsWhoCook and #chemchat - do you have a recommendation for a pan with non-stick coating, but without PFAS? The one that is really non-stick and holds reasonable time?
Reposted by Nikolay Tumanov
I've got a post-doctoral research position available at Curtin University (Western Australia) starting 2026.
The project involves computational prediction of crystal structures, their growth, and their properties for organic minerals on Titan (moon of Saturn).
staff.curtin.edu.au/job-vacancie...
The project involves computational prediction of crystal structures, their growth, and their properties for organic minerals on Titan (moon of Saturn).
staff.curtin.edu.au/job-vacancie...
Job vacancies, employment opportunities, academic and professional positions - Careers at Curtin | Curtin University, Perth Australia
Our mission is to transform lives and communities through education and research. Curtin employees form a unique and diverse community committed to innovative research and student learning. Find out a...
staff.curtin.edu.au
November 13, 2025 at 11:47 PM
I've got a post-doctoral research position available at Curtin University (Western Australia) starting 2026.
The project involves computational prediction of crystal structures, their growth, and their properties for organic minerals on Titan (moon of Saturn).
staff.curtin.edu.au/job-vacancie...
The project involves computational prediction of crystal structures, their growth, and their properties for organic minerals on Titan (moon of Saturn).
staff.curtin.edu.au/job-vacancie...
November 14, 2025 at 12:16 PM
Mineral on-line database ATHENA - made ones in 1994, works for >30 years. Take this Google and co!
athena.unige.ch/athena/
athena.unige.ch/athena/
ATHENA - Pierre Perroud
Athena is a pioneer Website created 1994 at Geneva University. French literature e-texts. Full mineral database with search programs
athena.unige.ch
November 13, 2025 at 9:14 PM
Mineral on-line database ATHENA - made ones in 1994, works for >30 years. Take this Google and co!
athena.unige.ch/athena/
athena.unige.ch/athena/
Reposted by Nikolay Tumanov
⏰ It’s almost time! Join us tomorrow for the first STOE User Talk of the season:
🧪 pTB in NoSpherA2 – Enabling Non-Spherical Refinements within Seconds
👨🔬 Ben Ebel, RWTH Aachen
📅 November 13, 15:00 CET
🔗 Register now — don’t miss it: stoe.clickmeeting.com/ebel/register
🧪 pTB in NoSpherA2 – Enabling Non-Spherical Refinements within Seconds
👨🔬 Ben Ebel, RWTH Aachen
📅 November 13, 15:00 CET
🔗 Register now — don’t miss it: stoe.clickmeeting.com/ebel/register
November 13, 2025 at 9:00 AM
⏰ It’s almost time! Join us tomorrow for the first STOE User Talk of the season:
🧪 pTB in NoSpherA2 – Enabling Non-Spherical Refinements within Seconds
👨🔬 Ben Ebel, RWTH Aachen
📅 November 13, 15:00 CET
🔗 Register now — don’t miss it: stoe.clickmeeting.com/ebel/register
🧪 pTB in NoSpherA2 – Enabling Non-Spherical Refinements within Seconds
👨🔬 Ben Ebel, RWTH Aachen
📅 November 13, 15:00 CET
🔗 Register now — don’t miss it: stoe.clickmeeting.com/ebel/register
Local climbing gym is equipped with a doghouse. Maybe it was something else at the beginning, but now it is definitely the doghouse.
November 12, 2025 at 9:35 PM
Local climbing gym is equipped with a doghouse. Maybe it was something else at the beginning, but now it is definitely the doghouse.
I was almost triggered by my own post, see the picture.
It is the aluminum analogue, not Artificial Idiot analogue...
It is the aluminum analogue, not Artificial Idiot analogue...
November 9, 2025 at 7:42 PM
I was almost triggered by my own post, see the picture.
It is the aluminum analogue, not Artificial Idiot analogue...
It is the aluminum analogue, not Artificial Idiot analogue...
Just in case if you were wondering about longest iodide in the world, I have answer for you: hexadecaiodide, I₁₆⁴⁻.
pubs.rsc.org/en/content/a...
www.ccdc.cam.ac.uk/structures/S...
#chemsky #chemchat
pubs.rsc.org/en/content/a...
www.ccdc.cam.ac.uk/structures/S...
#chemsky #chemchat
November 8, 2025 at 7:31 PM
Just in case if you were wondering about longest iodide in the world, I have answer for you: hexadecaiodide, I₁₆⁴⁻.
pubs.rsc.org/en/content/a...
www.ccdc.cam.ac.uk/structures/S...
#chemsky #chemchat
pubs.rsc.org/en/content/a...
www.ccdc.cam.ac.uk/structures/S...
#chemsky #chemchat
Ah, found another one: Oskarssonite
www.mindat.org/min-43853.html
www.mindat.org/min-43853.html
November 8, 2025 at 7:12 PM
Ah, found another one: Oskarssonite
www.mindat.org/min-43853.html
www.mindat.org/min-43853.html
Reposted by Nikolay Tumanov
For all you #crystallography people out there - what is your preferred way of acquiring the data when you want to solve the crystal structure from #PXRD? For how long, in what range? Is there anything specific you do?
What software do you use?
#chemistry #crystalstructure
What software do you use?
#chemistry #crystalstructure
November 7, 2025 at 10:42 AM
For all you #crystallography people out there - what is your preferred way of acquiring the data when you want to solve the crystal structure from #PXRD? For how long, in what range? Is there anything specific you do?
What software do you use?
#chemistry #crystalstructure
What software do you use?
#chemistry #crystalstructure
Reposted by Nikolay Tumanov
So I seem to recall hearing once that certain monofluorinated PAH compounds (ie 1-anthracene or 1-naphthalene positions) were carcinogenic (more-so than either the parent compounds or the chloro-derivatives). However I can seem to find a literature source for this. Does anyone know about this?
November 6, 2025 at 10:32 PM
So I seem to recall hearing once that certain monofluorinated PAH compounds (ie 1-anthracene or 1-naphthalene positions) were carcinogenic (more-so than either the parent compounds or the chloro-derivatives). However I can seem to find a literature source for this. Does anyone know about this?
@dr-berionni.bsky.social group synthesized something weird. Again. Accidentally, this time.
It is first time when I see Cl2I- anion, and there only ~60 structures in the CSD.
#crystallography #RealTimeChem #chemsky
It is first time when I see Cl2I- anion, and there only ~60 structures in the CSD.
#crystallography #RealTimeChem #chemsky
November 6, 2025 at 7:02 PM
@dr-berionni.bsky.social group synthesized something weird. Again. Accidentally, this time.
It is first time when I see Cl2I- anion, and there only ~60 structures in the CSD.
#crystallography #RealTimeChem #chemsky
It is first time when I see Cl2I- anion, and there only ~60 structures in the CSD.
#crystallography #RealTimeChem #chemsky