Helen MC

Helen MC

@crystallised-cricket.com

Follow for the crystal structures, stay for the cricket (or vice versa) Interests brought to you by the letter ‘C’, cryominerals 🥶, woman’s cricket 🏏, crafts 🧶 and cookbooks 🥘 Lives on Dharug and Gandangarra country (Blue Mountains, Australia)

1K followers513 following804 posts

Helen MC reposted

For parents and teachers: Encourage Year 10 girls across Australia to apply for an AMSI Specialist Maths Scholarship worth $6,000 over Years 11–12! Get financial support, mentoring and opportunities to explore maths careers. Applications extended to 11 November 2026. Find out more: amsi.org.au

Helen MC reposted

Even without hosting any, NZC could transform women's Test cricket just by accepting the invites they keep turning down to play them each time they tour AUS & ENG. As frequent every other year visitors to those nations, it would mean at least one women's Test a season could quickly become the norm.

Helen MC reposted

Why do we fear as a society the 1 in 27 million (the odds of a woman being killed by a shark 🦈) but ignore the 1 in 3 (the odds of a woman 🧒being physically or sexually abused by a man 👨)?

Nice collection of articles here - but sadly little/no mention of Titan which IMHO is perhaps the most fascinating world from a chemical perspective.

As space agencies prepare to turn brief excursions into long-term stays on the moon and Mars, chemistry shifts from a backstage helper to a leading role. #WorldSpaceWeek #WSW2026 #chemsky 🧪

Congrats to #Quartz, the literal bedrock of all minerals on Earth, after 10 years on the campaign trail it has got the #MinCup26 title. But a bigger congrats and thanks go to the @mineralcup.bsky.social team, for providing the sparkle we all needed to our social media feeds.

Mineral Cup & Ore Cup@mineralcup.bsky.social

Congratulations, Quartz! After a decade of #MinCup, this key rock-forming mineral of optical tricks is the #MinCup26 Champion! Due to intense manipulation attempts in the final hours, the exact winning margin is still being audited. Please join us tomorrow for celebration!

On the face of it, the two #MinCup26 finalists seem kinda samey at the atom-level. But #Cuprite has interpenetrating networks of atoms and is magnetic - it deserves you vote and the 2026 crown over stoic #Quartz

Mineral Cup & Ore Cup@mineralcup.bsky.social

#MinCup26 FINALS!!! We have a pair of geometric beauties as deep red #Cuprite is against versatile #Quartz. VOTE: www.mineralcup.org/2026/vote-re... RESULTS: www.mineralcup.org/2026/vote-re...

Helen MC reposted

Famously versatile and flaky! Graphite's structure is in the high school chemistry curriculum. It conducts electricity and is very soft, leading to its uses in grey 'lead' pencils and as a solid lubricant. Carbon has 5 polymorphs: graphite, diamond, lonsdaleite, chaoite and tartarosite.

Mineral Cup & Ore Cup@mineralcup.bsky.social

#MinCup26 Semifinal 2 It’s a match sure to break hearts between industrial powerhouses piezoelectric #quartz and lubricating #graphite! (With the correct links this time!) VOTE: www.mineralcup.org/2026/vote-re... RESULTS: www.mineralcup.org/2026/vote-re...

So it will be cubic v hexagonal for the #MinCup26 final, but what hexagonal mineral will it be? Is #graphite too flaky to stay the course? Is #quartz going to nick it in time? (see what I did there?) Tough call, but I think #Graphite gets my vote today (as I'm off out sketching!)

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Semi final #MinCup26 match up between #Cuprite and #Halite - I'm now fully behind the magnetic #Cuprite - and have dug out that neutron diffraction discovered it has nearly ZERO thermal expansion from 200-300 K link.springer.com/article/10.1... WEIRD!

Mineral Cup & Ore Cup@mineralcup.bsky.social

#MinCup26 SEMI-FINALS!!! It's showdown of the soft and cubical as coppery #Cuprite and salty #Halite compete for a spot in the finals! Both are worthy, but only one can have your vote. VOTE: www.mineralcup.org/2026/vote-re... RESULTS: www.mineralcup.org/2026/vote-re...

Helen MC reposted

New Horizons is now *three days away* from shutting off its two heliophysics instruments, simply because NASA has not provided the $2M in funding it had promised to the mission last year or this year. There is no science basis for shutting these off. Our earlier coverage:

science.orgNASA’s New Horizons mission may shut down two instruments over lack of fundingDecision risks “incalculable loss” of data from the edge of the Sun’s influence, scientists say

Helen MC reposted

Let's see #Cuprite in #MinCup26 finals! Jauch and Reehuis used γ-ray diffraction to revisit how electrons are arranged in Cu₂O, finding incomplete ionization of Cu and O but no Cu–Cu charge build-up to support covalent bonding. Reported in @actacrystb.iucr.org: journals.iucr.org/paper?S20525...

journals.iucr.orgReassessment of the electron density in Cu2O using γ-ray diffractionThe electron-density distribution in Cu2O has been critically reexamined to test controversial conclusions from earlier experimental and theoretical studies.
Mineral Cup & Ore Cup@mineralcup.bsky.social

#MinCup26 SEMI-FINALS!!! It's showdown of the soft and cubical as coppery #Cuprite and salty #Halite compete for a spot in the finals! Both are worthy, but only one can have your vote. VOTE: www.mineralcup.org/2026/vote-re... RESULTS: www.mineralcup.org/2026/vote-re...

hummm... I really hope that #pyromorphite gets through to the semis - cuprite, quartz and halite (all through so far) are all on the boring structure side. (on the plus point perhaps I get get my 6-year old niece to help me make models of them all) #MinCup26

Have shifted timezones so a little out of sorts - but looks like a tight one in the last #MinCup26 Quarterfinal. #Pyromorphite vividness comes from its phosphorus atoms, I love how they tuck into the crystal structure. That gets my vote today over boring #Graphite.

Mineral Cup & Ore Cup@mineralcup.bsky.social

#MinCup26 Quarterfinal 4 Linked by archaic translations and mineralogical misunderstandings, the quarterfinals are ending in hexagons with vivid pyromorphite vs writeable graphite. VOTE: www.mineralcup.org/2026/vote-re... RESULTS: www.mineralcup.org/2026/vote-re...

Helen MC reposted

Replying to @c0nc0rdance.bsky.social

The obvious conclusion (to me): if you have proprietary research & you upload it into the Plagiarism Nexus, it's not YOUR proprietary research anymore. Behave accordingly.

Hoping for a late surge for #Julienite in today's #MinCup26 quarter final. Hard to be up against a tasty opponent like #Halite - but it's structure is just so interesting! Look at those jewel-like blocks of death! (Not a chemist, but sulfur+nitrogen+carbon attached to a metal can't be healthy)

Mineral Cup & Ore Cup@mineralcup.bsky.social

#MinCup26 Quarterfinals 3 It's a pair of dissolvable beauties as rare and complicated #Julienite is against ubiquitous and straightforward #Halite. VOTE: www.mineralcup.org/2026/vote-re... RESULTS: www.mineralcup.org/2026/vote-re...

As some of us in Aus settle in for the Grand Final, as a Hawthorn fan I'm more focused on the Quarter Final of #MinCup26. From a crystal structure view battle of octahedra coordination within #Skutterudite vs tetrahedral coordination within #Quartz. Tough call today, but #Quartz gets the call.

Mineral Cup & Ore Cup@mineralcup.bsky.social

#MinCup26 Quarterfinal 2 Both of today's minerals can be found in hydrothermal vein deposits as cobalt arsenide #Skutterudite is against classic silicate #Quartz for a spot in the semi-finals. Vote: www.mineralcup.org/2026/vote-re... Results: www.mineralcup.org/2026/vote-re...

I’ve been catching up on listening to #TheArchers on my commute of late (you can take the girl out of England etc…) some dismay at recent storyline’s but mainly I just want the recipie for Usha’s apricot shortbread and to see an image of her conclave of radishes

Helen MC reposted

Replying to @louisedawe.bsky.social

Sphalerite is also historically important for crystallography since it was a big octahedral ZnS crystal that allowed Max von Laue show without a hint of doubt how X-rays are scattered at precise angles by crystals. A large, easy to allign crystal, helped show 3 and 4-fold rotational symmetry.

Helen MC reposted

Do you have a painting or drawing by Lawrence Bragg? The Nobel Prize-winning scientist appears in the 1927 Solvay photo alongside Einstein and Marie Curie; he was also a keen painter. I’m planning an exhibition about his life and times in 2027, the centenary of this picture.

So we enter the Quarter Finals of #MinCup26 - and first up is semi-boring structure #Sphalerite vs boring structure #Cuprite. Maybe it's just because it's my last day before leave, but can't seem to care about either of them... I guess as a neutron scatterer I'll have to go for magnetic #Cuprite

Mineral Cup & Ore Cup@mineralcup.bsky.social

#MinCup26 Quarterfinal 1 It’s a rich red start to the quarterfinals as two components of brass face off with zinc ore #Sphalerite is up against copper-rich #Cuprite. VOTE: www.mineralcup.org/2026/vote-re... RESULTS: www.mineralcup.org/2026/vote-re...

Helen MC reposted

I’m voting #Halite in this #MinCup26 round! Under 1.7 GPa, NaCl forms a tridecahydrate with a hydrogen-bond network like ice VI, including orientationally disordered water molecules. Yamashita explores salt’s this high-pressure chemistry in @actacrystb.iucr.org: journals.iucr.org/paper?ne5013=

journals.iucr.orgThe hydrogen-bond network in sodium chloride tridecahydrate: analogy with ice VIThe hydrogen-bonded structure of sodium chloride trideca­hydrate, NaCl·13(H, D)2O, has been determined at 1.7 GPa and 298 K by single-crystal neutron diffraction. Its hydrogen-bond network is analogou...
Mineral Cup & Ore Cup@mineralcup.bsky.social

#MinCup26 Round 2 Match 7 It's blue skies ahead as multicoloured cubes of #Halite are up against the bubbly cool-toned #Chrysocolla. VOTE: www.mineralcup.org/2026/vote-re... RESULTS: www.mineralcup.org/2026/vote-re...

No contest for #crystallography for today's #MinCup26 battle - we have 'I don't know my crystal structure' #Chrysocolla vs 'First crystal structure EVER determined' of #Halite. So though it is a boring structure - #Halite gets my vote today

Mineral Cup & Ore Cup@mineralcup.bsky.social

#MinCup26 Round 2 Match 7 It's blue skies ahead as multicoloured cubes of #Halite are up against the bubbly cool-toned #Chrysocolla. VOTE: www.mineralcup.org/2026/vote-re... RESULTS: www.mineralcup.org/2026/vote-re...

Helen MC reposted

Ebba Lund (b. #OTD in 1923) was an extraordinary Danish chemical engineer, microbiologist & virologist who lived two distinct lives. Before becoming a towering figure in European #science, she was a fearless #WWII resistance fighter who personally saved hundreds of lives. 🧵 #WomenInSTEM