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Key Concepts

• Đất hiếm (Rare Earth Elements - REEs): A group of 17 chemical elements with similar properties, crucial for modern technology.
• Lanthanides: The 15 elements in the rare earth group, from Lanthanum (La) to Lutetium (Lu).
• Scandium (Sc) and Yttrium (Y): Two elements often grouped with rare earths due to their co-occurrence in mineral deposits and similar chemical properties.
• Đất hiếm nhẹ (Light Rare Earth Elements - LREEs): More abundant, used in magnets for EVs and wind turbines, glass polishing, and older hybrid car batteries.
• Đất hiếm nặng (Heavy Rare Earth Elements - HREEs): Less abundant, difficult to separate, high economic value, crucial for high-tech applications like high-temperature magnets.
• Ion-adsorption clays: A specific type of deposit in Southern China and Myanmar, a primary source of HREEs.
• Processing and Refining: The critical, complex, and environmentally challenging stage of separating and purifying rare earth elements.
• Geopolitical Significance: The strategic importance of rare earths due to their essential role in advanced technologies and the concentration of processing capabilities in China.
• Supply Chain Dominance: China's control over the majority of global rare earth processing capacity.
• Strategic Resource: Rare earths are increasingly viewed as a critical resource for national security and economic competitiveness, akin to oil in the 20th century.
• Diversification Efforts: Initiatives by countries like the US, Europe, and Japan to reduce reliance on China for rare earth supply.
• Economic vs. Geological Reserves: The distinction between the total amount of a resource in the earth and the economically viable amount that can be extracted with current technology and costs.

What are Rare Earths?

The term "rare earth" is misleading. While not as common as some metals like iron or aluminum, they are not as scarce as gold or diamonds in geological terms. Scientifically, rare earths are a group of 17 metallic chemical elements with similar properties. They are located at the bottom of the periodic table, comprising the 15 Lanthanide elements (from Lanthanum, La, to Lutetium, Lu) and two related elements, Scandium (Sc) and Yttrium (Y). These elements share very similar atomic structures and chemical behaviors, often found together in mineral deposits.

For practical purposes, geologists and economists divide these 17 elements into two main groups based on atomic weight and value:

• Light Rare Earth Elements (LREEs): These are more abundant in nature and typically constitute a larger proportion of ore deposits. Their primary role is as key materials for permanent magnets used in electric vehicles (EVs) and wind turbines. Lighter and cheaper LREEs like Cerium (Ce) and Lanthanum (La) are used in glass polishing and older hybrid car batteries.
• Heavy Rare Earth Elements (HREEs): These are significantly less common, much harder to separate, and possess very high economic value. The current global supply of HREEs is almost entirely dependent on ion-adsorption clay deposits in Southern China and a small portion in Myanmar. HREEs are described as the "secret spice" for high-end technology. For instance, while Neodymium (Nd) magnets are very strong, they lose their magnetism at high temperatures. Adding small amounts of Dysprosium (Dy) or Terbium (Tb) (HREEs) makes these magnets more heat-resistant, essential for EV motors and guided missiles. Due to their irreplaceable role, HREEs are considered to have the highest strategic and geopolitical value.

The perceived "rarity" of rare earths stems not from their scarcity in the Earth's crust (some, like Cerium, are more abundant than copper or lead), but from their dispersion. Unlike metals like gold that can be found in concentrated nuggets or veins, rare earths are extremely dispersed and tend to bond strongly with each other or other elements like oxygen and phosphate in ores. Extracting them is akin to separating individual ingredients from a blended smoothie; they cannot be simply picked out.

The atomic structures of these 17 elements are so similar that they exhibit nearly identical chemical reactions. Separating a pure element requires thousands of complex, repetitive chemical reactions across multiple vats of acids and solvents. This process is not only a technological nightmare but also extremely expensive and generates significant toxic waste. Therefore, the difficulty in separation and refining is what makes rare earths costly and strategically important.

Essential Role in Modern Industry

Rare earths are foundational materials that determine the performance, size, and durability of high-tech products. Despite often comprising only a small percentage of a finished product by weight, they provide unique magnetic, optical, and chemical properties that cannot be replicated by conventional materials.

• Consumer Electronics:

  • Displays: Elements like Europium (Eu) for red, Terbium (Tb) for green, and Yttrium (Y) for the base phosphors are crucial for the accurate color reproduction and high brightness of LED screens in phones and TVs. Without them, screens cannot achieve precise colors and high luminosity.
  • Audio and Vibration: Neodymium (Nd) magnets, the strongest permanent magnets currently available, are used in compact speakers and headphones to produce loud, high-quality sound. They enable strong magnetic fields within a small physical space. These magnets are also the core component of phone vibration motors.
  • Surface Treatment and Lenses: Cerium oxide (CeO2) is an excellent polishing agent for touchscreens and silicon wafers, achieving nanometer-level flatness for microprocessor substrates. Lanthanum (La) is added to camera lens glass to increase the refractive index and reduce light dispersion, resulting in sharper images.

• Green Energy Sector:

  • The transition to renewable energy relies heavily on efficient conversion of electrical energy to mechanical energy. EV motors and wind turbine generators use Neodymium-Iron-Boron (NdFeB) alloy magnets, which have extremely high magnetic energy density. This allows for smaller, lighter motors that produce high power output and conserve energy.
  • A drawback of Nd magnets is their tendency to lose magnetism at high temperatures. To overcome this, manufacturers add Dysprosium (Dy) or Terbium (Tb) (HREEs) to ensure stable magnetism even when the motor heats up, guaranteeing safe and durable operation of EVs.

• Defense and Military Applications:

  • Modern weapon systems demand absolute precision, heat resistance, and high performance, all properties provided by rare earths.
  • Each F-35 fighter jet contains approximately 417 kg of rare earth materials used in actuators for flight control surfaces, stealth coatings, and radar systems.
  • Unlike civilian applications, the military often uses Samarium-Cobalt (SmCo) magnets. While slightly less magnetic than Neodymium magnets, SmCo magnets can withstand much higher operating temperatures without corrosion, making them suitable for harsh environments like rocket engines or military radar.
  • Laser and Optics Technology: Yttrium (Y) and Neodymium (Nd) are core components in solid-state lasers used for distance measurement and target designation for smart missiles. Lanthanum (La) is used in night vision goggles to enhance light gathering in low-light conditions.

Why are Powers Coveting Rare Earths?

If the 20th century saw nations willing to go to war for oil, the 21st century is witnessing a silent but fierce race for rare earth elements. The reason for this intense desire is not the scarcity of the resource itself, but the near-absolute dominance of one nation: China.

In 1992, Chinese leader Deng Xiaoping famously stated, "The Middle East has oil, China has rare earths." This statement became a guiding principle for a decades-long national strategy. China has quietly and persistently built a rare earth empire, not just by exploiting its own resources but by mastering the technology. Many mistakenly believe that whoever possesses the most ore deposits holds control. However, the reality is far more complex.

The rare earth production process involves two main stages:

1. Mining and Beneficiation: Extracting ore-bearing rock. Many countries, including the US, Australia, and Vietnam, can perform this stage.
2. Processing and Refining: This is the bottleneck of the global rare earth industry. As explained earlier, separating individual rare earth elements is a chemical and environmental nightmare. While Western nations shut down their processing plants due to pollution concerns and high costs, China accepted the trade-off to develop this technology.

As a result, even if ore is mined in the US or Australia, it is often shipped to China for processing. China currently controls approximately 85-90% of the world's rare earth refining capacity. This gives China the key to the rare earth treasure, meaning they control the supply of usable rare earth output for the entire world.

This dominance grants China formidable soft power, which the world has experienced through two notable events:

• The 2010 Shock: Following a collision between a Chinese fishing boat and a Japanese patrol vessel near the disputed Senkaku/Diaoyu Islands, China quietly restricted rare earth exports to Japan. The consequence was a surge in rare earth prices by hundreds of percent, plunging Japan's electronics and automotive industries into crisis due to material shortages.
• The 2023 Reminder: More recently, in 2023, China further tightened export controls on Gallium (Ga) and Germanium (Ge), critical materials for semiconductor chips and radar production. Although not chemically classified as rare earths, this move sent a clear message to the West: "We control the input for high technology, and we can turn off the tap at any time."

Due to this dangerous dependency, the US, Europe, Japan, and their allies are urgently racing against time to break this monopoly. They do not want their national security or their green energy future to be dependent on a strategic competitor. Diversification efforts are underway, including restarting the Mountain Pass mine in California, supporting Australian company Lynas, and seeking new partners in Vietnam and Africa. Rare earths are now the "oil of the 21st century," a strategic card determining superpower status in the new world order.

Turning Points Reshaping the Global Map

The year 2025 is marked as a period of unprecedented volatility in the global rare earth market. Old statistics are being overturned, new alliances are forming, and mineral resources are officially becoming the focal point of political negotiations.

• Vietnam's Statistics: For years, Vietnam was seen as a sleeping giant with estimated rare earth reserves of about 22 million tons, ranking second globally, just behind China. However, the latest report from the US Geological Survey (USGS), published in early 2025, caused a major shock. Based on new geological survey data and stricter economic feasibility assessment standards, the USGS revised Vietnam's confirmed reserve figure down to approximately 3.5 million tons, an 80% reduction from previous estimates. This adjustment moved Vietnam from second to sixth place globally, behind China, Brazil, India, Australia, and Russia. This reduction does not mean the resources have disappeared; it reflects the difference between potential geological resources and economically extractable reserves with current technology and costs. Despite the statistical decrease, 3.5 million tons remains a significant strategic resource. Vietnam's true challenge lies not in a lack of ore but in the absence of deep processing technology and issues with sustainable mining management.

• US-China Separation Ends Era of Dependence: In April 2025, MP Materials, the owner of the Mountain Pass mine in California (the largest and most important US rare earth mine), made a historic decision: to cease exports to China. Previously, MP Materials mined raw ore in the US but sent it to China for processing. In 2025, they announced a complete halt to this practice. Instead, they will process the ore at new facilities built on US soil. This move is a clear signal that the US has begun to close its domestic supply chain, from mining to refining and magnet production. The world is officially splitting into two distinct rare earth ecosystems: one led by China and another built by the US and its Western allies.

• New Currency on the Eastern European Negotiation Table: The conflict between Russia and Ukraine, entering 2025, has revealed a less-discussed aspect: the resource war. The eastern regions of Ukraine, such as Donbas, are not only geographically important but also contain mineral reserves, including lithium and rare earths. Recent diplomatic developments, including proposals from the US and Ukraine, indicate that the right to exploit and access these mineral deposits is becoming a form of collateral or "currency" in negotiations for reconstruction aid and security guarantees. Minerals have transitioned from being industrial raw materials to political leverage, shaping peace agreements and post-war order.

Rare earths in the 21st century are not just dry chemical elements on the periodic table; they are the key to unlocking the future of technology, from clean energy to national security. The race to acquire and control the rare earth supply chain is the race for superpower status in the 21st century. Understanding rare earths means understanding the undercurrents shaping the world we live in.