Where is mg from

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Last updated: April 8, 2026

Quick Answer: The chemical element magnesium (Mg) originates from stellar nucleosynthesis in stars and supernovae, with its atomic number 12 indicating it has 12 protons. On Earth, magnesium is primarily extracted from seawater, brines, and minerals like dolomite and magnesite, with global production reaching approximately 1.1 million metric tons in 2023. The largest producers include China, Russia, and Israel, with the Dead Sea providing about 30% of the world's magnesium supply.

Key Facts

Magnesium has atomic number 12 and atomic weight 24.305
Global magnesium production was approximately 1.1 million metric tons in 2023
China produces about 85% of the world's magnesium supply
Magnesium makes up about 13% of Earth's mass and 2% of the crust
The Dead Sea provides approximately 30% of global magnesium

Overview

Magnesium, represented by the chemical symbol Mg, is a lightweight metallic element with atomic number 12 that plays crucial roles in both natural systems and industrial applications. Its name derives from Magnesia, a district in Thessaly, Greece, where magnesium compounds were first discovered in ancient times. The element was first isolated in pure form by Sir Humphry Davy in 1808 through electrolysis of magnesium oxide, though it wasn't produced in significant quantities until the 20th century. Today, magnesium ranks as the eighth most abundant element in Earth's crust and the third most abundant element dissolved in seawater.

The element's origins trace back to astrophysical processes, primarily formed through stellar nucleosynthesis in aging stars and distributed through supernova explosions. On Earth, magnesium exists primarily in mineral forms rather than as pure metal, with major deposits found in sedimentary rocks, seawater, and underground brines. The industrial extraction of magnesium began in earnest during World War I when Germany developed processes to produce it for military applications. Since then, production methods have evolved significantly, with modern techniques focusing on efficiency and environmental sustainability.

How It Works

Magnesium extraction and production involve several key processes that transform raw materials into usable forms.

Primary Sources: Approximately 60% of magnesium comes from seawater extraction, where each cubic meter contains about 1.3 kilograms of magnesium. Another 30% originates from underground brines and salt lakes like the Dead Sea, while the remaining 10% comes from mining minerals such as dolomite (CaMg(CO₃)₂) and magnesite (MgCO₃). The Pidgeon process, developed in the 1940s, remains a dominant production method, using dolomite ore heated to 1,200°C under vacuum.
Extraction Methods: The electrolytic process involves passing electric current through molten magnesium chloride, producing pure magnesium at the cathode. This method accounts for about 35% of global production and requires approximately 35-40 kWh of electricity per kilogram of magnesium produced. Alternative methods include the thermal reduction process, which uses ferrosilicon as a reducing agent at temperatures around 1,150°C.
Geographic Distribution: China dominates global production with approximately 85% market share, producing around 935,000 metric tons annually. Russia follows with about 60,000 metric tons, while Israel produces approximately 40,000 metric tons primarily from Dead Sea brines. Other significant producers include Kazakhstan, Brazil, and the United States, though US production has declined to about 15,000 metric tons annually.
Historical Development: Commercial production began in Germany in 1886 using the electrolytic process, with annual production reaching just 10 tons initially. World War II dramatically increased demand, with US production alone jumping from 5,000 tons in 1940 to over 180,000 tons by 1943. The modern industry has consolidated around fewer but larger facilities, with individual plants now capable of producing 50,000-100,000 tons annually.

Key Comparisons

Feature	Seawater Extraction	Mineral Mining
Source Abundance	Virtually unlimited (1.3 kg/m³ in seawater)	Limited ore deposits
Production Cost	$2,000-$2,500 per ton	$2,800-$3,200 per ton
Energy Consumption	35-40 kWh/kg (electrolytic)	45-50 kWh/kg (thermal)
Environmental Impact	Lower carbon footprint	Higher mining disturbance
Geographic Flexibility	Coastal locations required	Deposit-dependent locations

Why It Matters

Industrial Applications: Magnesium's lightweight properties (density 1.74 g/cm³, 35% lighter than aluminum) make it crucial for automotive and aerospace industries, where reducing vehicle weight by 10% can improve fuel efficiency by 6-8%. The global magnesium alloy market was valued at $4.2 billion in 2023 and is projected to reach $6.8 billion by 2030, driven by demand for lighter vehicles.
Biological Significance: Magnesium serves as a cofactor for over 300 enzymatic reactions in the human body and is essential for ATP production, DNA synthesis, and muscle function. The average adult human body contains approximately 25 grams of magnesium, with recommended daily intake ranging from 310-420 mg depending on age and gender. Magnesium deficiency affects an estimated 48% of the US population and contributes to various health issues.
Environmental Considerations: Magnesium production has significant environmental implications, with traditional processes emitting 25-30 kg of CO₂ per kg of magnesium produced. However, new technologies like the Magnola process have reduced emissions to 5-10 kg CO₂/kg. Recycling magnesium requires only 5% of the energy needed for primary production, making closed-loop systems increasingly important for sustainability.

Looking forward, magnesium's role will likely expand as industries seek lighter materials and sustainable production methods. Advances in extraction technology, particularly in seawater processing and recycling, could reduce environmental impacts while meeting growing demand. The element's unique combination of lightness, strength, and abundance positions it as a key material for future transportation, energy storage, and construction applications, potentially transforming multiple sectors of the global economy.