# Scientists solve the 200-year dolomite problem - Category: **Science** - Publisher: **Psyll Magazine** - [https://psyll.com](https://psyll.com) - Author: **Natalia Petrova** - [https://psyll.com/natalia](https://psyll.com/natalia) - Original article: [https://psyll.com/articles/science/scientists-resolve-the-200-year-old-dolomite-proble](https://psyll.com/articles/science/scientists-resolve-the-200-year-old-dolomite-proble) --- ![Main image](https://psyll.com/assets/image/scientists-resolve-the-200-year-old-dolomite-problem.webp) **Geologists solve the Dolomite Problem by identifying how cycles of dissolution remove atomic defects to allow mineral growth in ambient conditions.** --- For over two centuries, geologists have puzzled over the "Dolomite Problem": the mineral dolomite (CaMg(CO₃)₂) is exceptionally abundant in ancient sedimentary rock formations but nearly absent in modern environments. Scientists had also been entirely unable to synthesize dolomite in the laboratory under conditions that mimic natural environments near ambient temperatures - a gap between field observation and bench chemistry that, frankly, should make any geologist a little uneasy. If a mineral makes up roughly 30% of the sedimentary carbonate rock in Earth's crust, we ought to be able to grow it. For 200 years, we couldn't. In 2023, a collaborative research team from the University of Michigan and Hokkaido University resolved key aspects of this long-standing mystery, publishing their findings in the journal *Science*. Their work has continued to draw attention through 2026 as materials scientists explore its industrial implications, and it provides a robust mechanistic explanation for the scarcity of primary dolomite in modern settings. ## Understanding the dolomite problem and decades of failed experiments To grasp the magnitude of this discovery, it helps to sit with the history of failed laboratory attempts for a moment, because it really is a remarkable record of frustration. Dolomite requires supersaturated solutions containing high concentrations of calcium and magnesium ions to form. Give it that, chemists assumed, and the crystal should grow. Instead, dolomite consistently refused to precipitate, even in heavily supersaturated lab solutions held at ambient temperatures. The frustration runs so deep in the scientific record that one particular experiment attempted to grow dolomite from a solution supersaturated a thousandfold over - and kept that solution running for 32 consecutive years. It failed. Not partially, not slowly - it simply never produced dolomite, despite chemical conditions that, on paper, should have made the mineral's formation almost inevitable. That result, more than any other, crystallized (no pun intended) the apparent contradiction at the heart of the problem: massive natural deposits of dolomite exist all over the planet, yet the mineral refuses to grow under controlled, stable conditions. It's worth noting that dolomite itself has been a subject of scientific curiosity since the late eighteenth century. The mineral was first formally described in 1792 by the Swiss naturalist Déodat de Dolomieu, for whom both the mineral and the Italian Dolomite mountains are named, after he examined carbonate rock samples from the Alps. So the "problem" bearing his name has, in a sense, been quietly waiting for a solution since the very decade the mineral was named. ## Atomic-scale defects and the role of cyclic dissolution The researchers discovered that the primary barrier to dolomite growth is the formation of atomic-scale defects on the crystal's growing surface. Dolomite's structure calls for calcium and magnesium ions to occupy alternating, ordered rows within the crystal lattice - a strict architectural requirement most minerals don't share. But as the crystal grows from solution, calcium and magnesium ions attach somewhat indiscriminately, often lodging into the wrong position. This creates cumulative surface strain that blocks further orderly, layer-by-layer growth. Left to its own devices under constant supersaturation, this disorder is so limiting that it would take an estimated 10 million years to form a single well-ordered layer of dolomite. In natural settings, though, these defects don't get the chance to accumulate indefinitely. They are periodically stripped away through cycles of dissolution. When the surrounding solution turns undersaturated - because of rainfall, evaporation, or tidal fluctuation - the disordered, higher-energy regions of the crystal surface dissolve first, since they are less thermodynamically stable than properly ordered regions. This dissolution acts almost like a self-cleaning mechanism: it washes away the flawed atoms and leaves behind a more ordered template, onto which the next layer of dolomite can form far more quickly once conditions turn supersaturated again. > "The apparent contradiction between the massive deposits of dolomite in nature and its inability to grow from supersaturated solutions near ambient conditions is a long-standing mystery known as the 'dolomite problem.'" That's roughly how Wenhao Sun, the University of Michigan materials scientist who led the study, framed the puzzle his team set out to solve. The elegance of the eventual answer is that it inverts the intuitive approach to crystal growth entirely: instead of protecting a crystal from dissolution, you need periodic dissolution to get a clean result. ## Computational simulations and electron microscopy verification To test the cyclic dissolution hypothesis, the team turned to advanced atomistic simulations grounded in density functional theory and cluster expansion methods. These are the kinds of calculations that would ordinarily demand enormous computing resources - each atomic step could take upwards of 5,000 CPU hours on a supercomputer. The researchers got around this bottleneck using software developed at Michigan's Predictive Structure Materials Science (PRISMS) Center, which calculates the energy of a handful of atomic arrangements and then extrapolates the rest based on the crystal's symmetry. That shortcut brought calculation time for a single atomic step down to about two milliseconds on an ordinary desktop computer, which made it feasible to model dolomite growth across the kind of long timescales geology actually operates on. By simulating fluctuating saturation levels rather than the constant supersaturation used in prior lab attempts, the researchers found that frequent saturation cycling could accelerate dolomite growth by up to seven orders of magnitude compared to static conditions. The theoretical model still needed physical proof, though, and that's where the collaboration with Hokkaido University became essential. Researchers there used an aberration-corrected transmission electron microscope fitted with a liquid cell, and they exploited a property of electron beams that is normally considered a nuisance: the beam can split water molecules, generating a mild, localized acid that dissolves nearby crystal surfaces. Usually this effect is something microscopists try to avoid, since it degrades the very sample they're trying to image. Here, it became the tool itself. By pulsing the electron beam roughly 4,000 times over two hours, the Hokkaido team induced controlled, rapid cycles of dissolution and re-precipitation, effectively zapping away misplaced calcium and magnesium atoms as they appeared. Under this regime, a seed dolomite crystal grew by approximately 100 nanometers - a genuinely unprecedented result for bulk dolomite growth in a laboratory setting. That figure represents roughly 300 ordered atomic layers, a striking leap beyond every prior attempt, none of which had managed to produce more than about five layers. It's fair to say not every geologist has been fully won over by how directly the lab result maps onto ancient rock formation. Some researchers, including emeritus geology professor Jay Gregg of Oklahoma State University, have pointed out that invoking saturation cycling as the origin of the largest, most massive dolomite units in the geological record is a harder case to make than explaining smaller-scale, localized dolomite formation. Sun and his colleagues counter that the pattern of where dolomite forms in nature today - almost exclusively in settings with fluctuating chemistry - lines up well with their model, even if some of the biggest ancient deposits may still involve additional processes. This kind of open, ongoing debate is normal science, and it's worth keeping in view rather than pretending the paper closed every remaining question. ## Famous natural dolomite formations around the world The study helps explain why dolomite is predominantly found in geological strata that experienced frequent environmental fluctuation rather than steady, unchanging chemistry. Modern, actively forming dolomite is concentrated in coastal sabkhas, hypersaline lagoons, and tidal flats where salinity and pH shift with the rhythm of wet and dry seasons or tidal cycles - conditions that naturally produce exactly the kind of cyclic dissolution the Michigan and Hokkaido teams identified as essential. Ancient seabeds, over deep geological time, provided similarly fluctuating conditions on a much larger scale. As marine organisms died and their remains accumulated, they formed limestone, which then recrystallized into dolomite as magnesium-rich waters percolated through it across millions of years - a process known as dolomitization. Today, the results of that slow transformation are visible in some remarkable landscapes. The **Dolomite mountains** of northeastern Italy are the most famous example and the mineral's namesake, their pale, jagged peaks composed of dolomitic limestone laid down in Triassic-era shallow seas. Extensive dolomite is also found along the **Niagara Escarpment**, the resistant rock ridge that carries the Niagara River over Niagara Falls and that stretches from New York through Ontario and into Wisconsin. In the American Southwest, dolomite-bearing rock contributes to the geology of several formations in **Utah**, including areas within Bryce Canyon's hoodoo-studded landscape, though the hoodoos themselves are more famously carved from limestone and siltstone than from dolomite alone. ## Implications for modern geology and materials science Beyond resolving a genuinely old geological puzzle, these findings offer a broader insight into the kinetics of crystal growth generally. Periodic mild dissolution functions as a kind of built-in reset button, and it turns out to be a remarkably effective strategy for producing high-quality, low-defect crystals - not just in dolomite, but potentially in synthetic materials engineered for entirely different purposes. That reframing carries real weight for materials science. Historically, anyone trying to manufacture defect-free crystalline materials had one main lever to pull: grow them extremely slowly, giving atoms time to settle into the right positions before the next layer forms. This research suggests a different, faster path is possible - defect-free materials can be grown quickly, provided flaws are periodically dissolved away during the growth process itself rather than avoided from the outset. As Sun put it, the old approach was to try to prevent defects; the new one is to let them form and then clean them out on a cycle. That principle could meaningfully influence how the next generation of precision materials gets made, including semiconductors, solar-panel components, solid-state battery materials, and other technologies that depend on extremely low-defect crystal structures. Whether the technique scales cleanly from a 100-nanometer laboratory demonstration to industrial manufacturing is still an open engineering question, but the underlying physical principle now has solid experimental backing behind it. **Note:** This discovery does not claim to explain every instance of dolomite formation in nature - dolomite can also form through the replacement of precursor minerals during later diagenesis, a separate pathway from the primary crystal growth studied here - but it does directly resolve the laboratory synthesis paradox and offers a strong mechanistic account for the scarcity of primary dolomite forming today. ## Key takeaways: * Dolomite (CaMg(CO₃)₂) makes up roughly *30% of sedimentary carbonate rock* in Earth's crust, yet it had never been synthesized in a lab under near-ambient conditions until 2023. * A **32-year laboratory experiment** failed to precipitate dolomite despite maintaining a *1,000-fold supersaturated* solution the entire time. * The study resolving the mystery, *"Dissolution enables dolomite crystal growth near ambient conditions,"* was published in the journal **Science** in **November 2023** by teams from the University of Michigan and Hokkaido University. * The core barrier to growth is **atomic-scale cation disorder** \- calcium and magnesium ions attaching to random\, incorrect positions in the crystal's strict alternating\-row structure\. * Without intervention, this disorder means it would take an estimated **10 million years** to form just one ordered atomic layer of dolomite. * **Cyclic dissolution** \- caused naturally by rainfall\, evaporation\, or tidal fluctuation \- preferentially dissolves disordered atoms\, acting as a natural "reset" that enables faster\, ordered growth\. * Computational modeling showed that *frequent saturation cycling* could accelerate dolomite growth by up to **seven orders of magnitude**. * Researchers at Hokkaido University used a transmission electron microscope's beam to split water into a mild acid, pulsing it **4,000 times over two hours** to simulate natural dissolution cycles. * This produced roughly **100 nanometers** of dolomite growth - about *300 ordered atomic layers* \- far surpassing the five\-layer limit of all prior lab attempts\. * Dolomite was first formally described in **1792** by Swiss naturalist Déodat de Dolomieu, for whom the mineral and the Italian Dolomite mountains are both named. * Some geologists remain cautious about applying the saturation-cycling model to the *largest, most massive* ancient dolomite deposits, noting it may not be the sole explanation for every formation. * The findings suggest **periodic dissolution** could help manufacture faster, higher-quality defect-free materials for *semiconductors, solar panels, and solid-state batteries*. ## Sources: * Science Journal (peer-reviewed study) - [https://www.science.org/doi/10.1126/science.adi3690](https://www.science.org/doi/10.1126/science.adi3690) * University of Michigan News - [https://news.umich.edu/200-year-old-geology-mystery-resolved/](https://news.umich.edu/200-year-old-geology-mystery-resolved/) * Hokkaido University News - [https://www.global.hokudai.ac.jp/blog/200-year-old-geology-puzzle-resolved/](https://www.global.hokudai.ac.jp/blog/200-year-old-geology-puzzle-resolved/) * ScienceDaily - [https://www.sciencedaily.com/releases/2026/04/260420015840.htm](https://www.sciencedaily.com/releases/2026/04/260420015840.htm) * Chemistry World - [https://www.chemistryworld.com/news/dolomite-problem-that-has-puzzled-scientists-for-centuries-may-have-finally-been-solved/4018596.article](https://www.chemistryworld.com/news/dolomite-problem-that-has-puzzled-scientists-for-centuries-may-have-finally-been-solved/4018596.article) ## Author - **Author**: Natalia Petrova - **Job title**: Earth Sciences & Climate Analyst - **Author profile**: [https://psyll.com/natalia](https://psyll.com/natalia) - **About author**: Natalia Petrova is a geologist with extensive field experience across Siberia and the Russian Far East, specializing in tectonic processes, mineral resource assessment, volcanic activity, and the geological dimensions of climate change. She approaches environmental questions from deep geological time - understanding how planetary forces operating across millions of years create the conditions that now define humanity's most urgent contemporary challenges. Her work connects earth science fundamentals to real-world implications for energy systems, resource security, and environmental policy. ## **License** This article is licensed under the Creative Commons Attribution 4.0 International (CC BY 4.0). You are free to copy, redistribute, and share this article in any medium or format, provided that: - Attribution is given to the original author. - A visible link to the original article is included: https://psyll.com/articles/science/scientists-resolve-the-200-year-old-dolomite-proble - Any modifications are clearly indicated. License: [https://creativecommons.org/licenses/by/4.0/](https://creativecommons.org/licenses/by/4.0/)