56
Ba
Barium

Barium

Element 56 • Alkaline Earth Metal
Atomic Mass 137.327000
Electron Config Unknown
Group/Period 2/6

Physical Properties

MEASURED
Atomic Mass
137.327000 u
Melting Point
1000.00 °C
Boiling Point
2170.00 °C
Ionization Energy
5.21 kJ/mol

Special Properties

CLASSIFIED
STABLE Generally safe to handle with standard precautions

Applications

CATALOGUED

Medical Imaging Revolution

Barium sulfate has transformed medical diagnostics as the primary contrast agent for X-ray imaging of the digestive system. Its high atomic number makes it opaque to X-rays, allowing doctors to visualize the stomach, intestines, and colon with remarkable clarity. Over 10 million Barium studies are performed annually worldwide, detecting cancers, ulcers, and digestive disorders that would otherwise remain hidden.

Advanced Pigments and Coatings

Barium sulfate serves as a premium white pigment and extender in high-performance paints, providing exceptional opacity, brightness, and chemical resistance. Automotive paints use Barium compounds for durability and color stability, while architectural coatings rely on Barium for weather resistance and fade prevention.

Oil and Gas Drilling

The petroleum industry consumes over 8 million tons annually of Barium sulfate (barite) as a weighting agent in drilling muds. This dense mineral increases mud density to counteract high-pressure oil and gas formations, preventing

dangerous blowouts during deep drilling operations reaching depths of 30,000+ feet.

Display Technology

Barium titanate revolutionized electronics with its ferroelectric properties, enabling capacitors that store massive charge in tiny spaces. CRT televisions and computer monitors used Barium compounds in electron guns and phosphor coatings, while modern ceramic capacitors in smartphones contain Barium titanate for power management.

Pyrotechnics and Flares

Barium nitrate and chlorate create brilliant green flames in fireworks, flares, and military signal devices. The distinctive green color is so pure and bright that Barium compounds are irreplaceable in professional pyrotechnics, from Olympic ceremonies to emergency maritime flares.

Glass and Ceramics Enhancement

Optical glass containing Barium oxide achieves exceptional clarity and refractive properties for precision lenses in cameras, telescopes, and scientific instruments. Crown glass with Barium provides superior optical performance while ceramic applications use Barium for enhanced dielectric properties.

Common Uses

INDEXED

Medical Procedures

If you've ever had a "Barium swallow" or digestive X-ray, you've consumed Barium sulfate! This chalky, strawberry-flavored drink allows doctors to see your digestive tract clearly on X-rays, helping diagnose everything from ulcers to intestinal blockages safely and effectively.

Automotive Industry

Your car's paint likely contains Barium sulfate for durability and shine. Brake pads use Barium compounds for consistent friction, while spark plug ceramics incorporate Barium for heat resistance. Even automotive glass may contain Barium for optical clarity.

Household Products

Premium paints and primers in your home contain Barium sulfate for superior coverage and longevity. High-end cosmetics use Barium sulfate as a safe, non-

toxic filler and brightening agent in foundations and powders.

Electronics

Your smartphone, tablet, and laptop contain Barium titanate capacitors that manage power efficiently. These tiny components store and release electrical energy precisely, enabling fast charging and stable operation of modern electronic devices.

Construction Materials

Concrete and building materials often include Barium sulfate for radiation shielding in hospitals and nuclear facilities. Dense Barium concrete protects medical staff during X-ray procedures and shields nuclear reactor facilities.

Photography and Optics

High-quality camera lenses and binoculars use Barium-containing optical glass for superior image quality. The Barium oxide reduces chromatic aberration and provides exceptional clarity for professional photography and scientific instruments.

Security Features

Paper money and important documents sometimes incorporate Barium compounds in security inks and papers, making counterfeiting more difficult through special detection methods available to authentication experts.

Natural Occurrence

SURVEYED

Abundant Crustal Element

Barium ranks as the 14th most abundant element in Earth's crust at 425 parts per million, making it more common than carbon or sulfur. Despite this abundance, Barium never occurs as a free metal in nature due to its extreme reactivity with oxygen and water.

Primary Mineral - Barite

The most important Barium mineral is barite (BaSO₄), forming massive deposits worldwide. Major barite mines operate in China, India, Morocco, and the United States, with China producing over 3 million tons annually - about 40% of global output.

Hydrothermal Origins

Hydrothermal processes create most commercial barite deposits when hot, mineral-rich fluids precipitate Barium sulfate in veins and cavities. These deposits often associate with lead, zinc, and fluorite minerals, creating complex ore bodies that challenge mining operations.

Witherite - The Rare Carbonate

Witherite (BaCO₃) forms beautiful crystal clusters but occurs much less frequently than barite. Named after British mineralogist William Withering, these formations provide high-purity Barium for specialized chemical applications requiring carbonate starting materials.

Sedimentary Concentrations

Marine environments concentrate Barium through biological processes, creating sedimentary barite deposits on ocean floors. Deep-sea drilling reveals Barium-rich layers that record ancient oceanic conditions and biological productivity cycles.

Geographic Distribution

Significant Barium deposits span the globe: Nevada's Battle Mountain (world's largest barite mine), India's Andhra Pradesh (high-grade deposits), Morocco's Atlas Mountains (major reserves), and Turkey's Anatolian region (growing production).

Stellar Formation

Barium forms in asymptotic giant branch stars through the s-process, where slow neutron capture builds heavy elements. Barium-enhanced stars provide astronomical laboratories for studying nucleosynthesis and galactic chemical evolution over billions of years.

Discovery

ARCHIVED
1808

The Alchemist's Glowing Stone

The barium story begins in early 1600s Italy with Vincenzo Casciarolo, a Bologna shoemaker and amateur alchemist. While searching for the philosopher's stone, he discovered strange heavy stones near Bologna that, after heating, glowed eerily in the dark. These "Bologna stones" (barium sulfide) fascinated scholars for centuries before anyone understood their true nature.

Scheele's Chemical Detective Work

In 1774, Swedish pharmacist Carl Wilhelm Scheele made the crucial breakthrough while analyzing pyrolusite (manganese dioxide). He discovered that some samples contained an unknown "heavy earth" that formed a white precipitate with sulfuric acid - the first chemical evidence of barium's existence.

Hope's Systematic Investigation

Scottish physician Thomas Charles Hope at the University of Glasgow systematically studied this mysterious substance in 1792. He named it "baryta" from the Greek "barys" meaning heavy, recognizing its unusually high density compared to other earth-like substances.

Davy's Electrolytic Triumph

The brilliant English chemist Sir Humphry Davy finally isolated metallic barium in 1808 using his revolutionary electrolysis technique. By passing electric current through molten barium hydroxide, he produced silvery droplets of pure barium metal - though they immediately burst into flames upon contact with air!

Dangerous Early Experiments

Early barium researchers faced constant danger. The metal's extreme reactivity caused numerous laboratory fires and explosions. Antoine Lavoisier nearly lost his eyebrows investigating barium compounds, while other chemists suffered serious burns from unexpected reactions with moisture in the air.

Industrial Revolution Applications

The 19th century saw barium transition from laboratory curiosity to industrial workhorse. Barite mining expanded rapidly as the oil industry discovered its value in drilling muds. The invention of X-rays in 1895 created new medical applications, while the electronics revolution of the 20th century made barium titanate essential for modern capacitors.

Modern Recognition

Today, barium honors its discoverers through the Scheele Award in analytical chemistry and the Davy Medal from the Royal Society. From glowing stones to smartphone components, barium's journey reflects humanity's evolving understanding of matter itself.

Safety Information

CRITICAL

Severe
Toxicity Warning

POISON: Soluble Barium compounds are extremely toxic!

Barium chloride, nitrate, and hydroxide can cause fatal poisoning at doses as low as 1-2 grams. Symptoms include vomiting, diarrhea, muscle paralysis, heart arrhythmias, and respiratory failure leading to death.

Cardiovascular
Dangers

Barium poisoning primarily affects the cardiovascular and nervous systems.

It blocks potassium channels in cell membranes, causing
dangerous heart rhythm abnormalities, muscle weakness, and paralysis.
Emergency treatment requires immediate potassium supplementation and cardiac monitoring.

Safe Compound Exception

Barium sulfate is remarkably safe due to its complete insolubility in water and biological fluids. Used safely in millions of medical X-ray procedures, it passes through the digestive system unchanged. However, never confuse it with soluble Barium salts which are deadly.

Radioactive Barium Hazards

Barium-140 and other radioactive isotopes pose dual threats from both chemical

toxicity and radiation exposure.
These isotopes concentrate in bones like calcium, causing long-term radiation damage and increased cancer risk.

Metallic Barium Reactivity

Metallic Barium ignites spontaneously in air and reacts

explosively with water, producing hydrogen gas and caustic Barium hydroxide.
Store under inert gas or mineral oil. Metal fires require special extinguishers - never use water!

Emergency Procedures

For Barium poisoning: immediate medical attention is critical. Administer activated charcoal if conscious, induce vomiting only if instructed by poison control, and prepare for cardiac monitoring and potassium therapy. Contact emergency services immediately - minutes can mean the difference between life and death.

Workplace Safety

Industrial workers handling Barium compounds must use full respiratory protection, chemical-resistant gloves, and eye protection. Maintain strict hygiene protocols, shower after exposure, and never eat or drink in work areas containing Barium materials.

Knowledge Database

Essential information about Barium (Ba)

Barium is unique due to its atomic number of 56 and belongs to the Alkaline Earth Metal category. With an atomic mass of 137.327000, it exhibits distinctive properties that make it valuable for various applications.

Barium has several important physical properties:

Melting Point: 1000.00 K (727°C)

Boiling Point: 2170.00 K (1897°C)

State at Room Temperature: solid

Atomic Radius: 222 pm

Barium has various important applications in modern technology and industry:

Medical Imaging Revolution

Barium sulfate has transformed medical diagnostics as the primary contrast agent for X-ray imaging of the digestive system. Its high atomic number makes it opaque to X-rays, allowing doctors to visualize the stomach, intestines, and colon with remarkable clarity. Over 10 million Barium studies are performed annually worldwide, detecting cancers, ulcers, and digestive disorders that would otherwise remain hidden.

Advanced Pigments and Coatings

Barium sulfate serves as a premium white pigment and extender in high-performance paints, providing exceptional opacity, brightness, and chemical resistance. Automotive paints use Barium compounds for durability and color stability, while architectural coatings rely on Barium for weather resistance and fade prevention.

Oil and Gas Drilling

The petroleum industry consumes over 8 million tons annually of Barium sulfate (barite) as a weighting agent in drilling muds. This dense mineral increases mud density to counteract high-pressure oil and gas formations, preventing

dangerous blowouts during deep drilling operations reaching depths of 30,000+ feet.

Display Technology

Barium titanate revolutionized electronics with its ferroelectric properties, enabling capacitors that store massive charge in tiny spaces. CRT televisions and computer monitors used Barium compounds in electron guns and phosphor coatings, while modern ceramic capacitors in smartphones contain Barium titanate for power management.

Pyrotechnics and Flares

Barium nitrate and chlorate create brilliant green flames in fireworks, flares, and military signal devices. The distinctive green color is so pure and bright that Barium compounds are irreplaceable in professional pyrotechnics, from Olympic ceremonies to emergency maritime flares.

Glass and Ceramics Enhancement

Optical glass containing Barium oxide achieves exceptional clarity and refractive properties for precision lenses in cameras, telescopes, and scientific instruments. Crown glass with Barium provides superior optical performance while ceramic applications use Barium for enhanced dielectric properties.

1808

The Alchemist's Glowing Stone

The barium story begins in early 1600s Italy with Vincenzo Casciarolo, a Bologna shoemaker and amateur alchemist. While searching for the philosopher's stone, he discovered strange heavy stones near Bologna that, after heating, glowed eerily in the dark. These "Bologna stones" (barium sulfide) fascinated scholars for centuries before anyone understood their true nature.

Scheele's Chemical Detective Work

In 1774, Swedish pharmacist Carl Wilhelm Scheele made the crucial breakthrough while analyzing pyrolusite (manganese dioxide). He discovered that some samples contained an unknown "heavy earth" that formed a white precipitate with sulfuric acid - the first chemical evidence of barium's existence.

Hope's Systematic Investigation

Scottish physician Thomas Charles Hope at the University of Glasgow systematically studied this mysterious substance in 1792. He named it "baryta" from the Greek "barys" meaning heavy, recognizing its unusually high density compared to other earth-like substances.

Davy's Electrolytic Triumph

The brilliant English chemist Sir Humphry Davy finally isolated metallic barium in 1808 using his revolutionary electrolysis technique. By passing electric current through molten barium hydroxide, he produced silvery droplets of pure barium metal - though they immediately burst into flames upon contact with air!

Dangerous Early Experiments

Early barium researchers faced constant danger. The metal's extreme reactivity caused numerous laboratory fires and explosions. Antoine Lavoisier nearly lost his eyebrows investigating barium compounds, while other chemists suffered serious burns from unexpected reactions with moisture in the air.

Industrial Revolution Applications

The 19th century saw barium transition from laboratory curiosity to industrial workhorse. Barite mining expanded rapidly as the oil industry discovered its value in drilling muds. The invention of X-rays in 1895 created new medical applications, while the electronics revolution of the 20th century made barium titanate essential for modern capacitors.

Modern Recognition

Today, barium honors its discoverers through the Scheele Award in analytical chemistry and the Davy Medal from the Royal Society. From glowing stones to smartphone components, barium's journey reflects humanity's evolving understanding of matter itself.

Discovered by: <div class="discovery-story"> <h3><i class="fas fa-lightbulb"></i> The Alchemist's Glowing Stone</h3> <p>The barium story begins in early 1600s Italy with <strong>Vincenzo Casciarolo</strong>, a Bologna shoemaker and amateur alchemist. While searching for the philosopher's stone, he discovered strange heavy stones near Bologna that, after heating, glowed eerily in the dark. These "Bologna stones" (barium sulfide) fascinated scholars for centuries before anyone understood their true nature.</p> <h3><i class="fas fa-search"></i> Scheele's Chemical Detective Work</h3> <p>In 1774, Swedish pharmacist <strong>Carl Wilhelm Scheele</strong> made the crucial breakthrough while analyzing pyrolusite (manganese dioxide). He discovered that some samples contained an unknown "heavy earth" that formed a white precipitate with sulfuric acid - the first chemical evidence of barium's existence.</p> <h3><i class="fas fa-flask"></i> Hope's Systematic Investigation</h3> <p>Scottish physician <strong>Thomas Charles Hope</strong> at the University of Glasgow systematically studied this mysterious substance in 1792. He named it <strong>"baryta"</strong> from the Greek "barys" meaning heavy, recognizing its unusually high density compared to other earth-like substances.</p> <h3><i class="fas fa-bolt"></i> Davy's Electrolytic Triumph</h3> <p>The brilliant English chemist <strong>Sir Humphry Davy</strong> finally isolated metallic barium in 1808 using his revolutionary electrolysis technique. By passing electric current through molten barium hydroxide, he produced silvery droplets of pure barium metal - though they immediately burst into flames upon contact with air!</p> <h3><i class="fas fa-fire"></i> Dangerous Early Experiments</h3> <p>Early barium researchers faced constant danger. The metal's extreme reactivity caused numerous laboratory fires and explosions. <strong>Antoine Lavoisier</strong> nearly lost his eyebrows investigating barium compounds, while other chemists suffered serious burns from unexpected reactions with moisture in the air.</p> <h3><i class="fas fa-industry"></i> Industrial Revolution Applications</h3> <p>The 19th century saw barium transition from laboratory curiosity to industrial workhorse. <strong>Barite mining</strong> expanded rapidly as the oil industry discovered its value in drilling muds. The invention of X-rays in 1895 created new medical applications, while the electronics revolution of the 20th century made barium titanate essential for modern capacitors.</p> <h3><i class="fas fa-medal"></i> Modern Recognition</h3> <p>Today, barium honors its discoverers through the <strong>Scheele Award</strong> in analytical chemistry and the <strong>Davy Medal</strong> from the Royal Society. From glowing stones to smartphone components, barium's journey reflects humanity's evolving understanding of matter itself.</p> </div>

Year of Discovery: 1808

Abundant Crustal Element

Barium ranks as the 14th most abundant element in Earth's crust at 425 parts per million, making it more common than carbon or sulfur. Despite this abundance, Barium never occurs as a free metal in nature due to its extreme reactivity with oxygen and water.

Primary Mineral - Barite

The most important Barium mineral is barite (BaSO₄), forming massive deposits worldwide. Major barite mines operate in China, India, Morocco, and the United States, with China producing over 3 million tons annually - about 40% of global output.

Hydrothermal Origins

Hydrothermal processes create most commercial barite deposits when hot, mineral-rich fluids precipitate Barium sulfate in veins and cavities. These deposits often associate with lead, zinc, and fluorite minerals, creating complex ore bodies that challenge mining operations.

Witherite - The Rare Carbonate

Witherite (BaCO₃) forms beautiful crystal clusters but occurs much less frequently than barite. Named after British mineralogist William Withering, these formations provide high-purity Barium for specialized chemical applications requiring carbonate starting materials.

Sedimentary Concentrations

Marine environments concentrate Barium through biological processes, creating sedimentary barite deposits on ocean floors. Deep-sea drilling reveals Barium-rich layers that record ancient oceanic conditions and biological productivity cycles.

Geographic Distribution

Significant Barium deposits span the globe: Nevada's Battle Mountain (world's largest barite mine), India's Andhra Pradesh (high-grade deposits), Morocco's Atlas Mountains (major reserves), and Turkey's Anatolian region (growing production).

Stellar Formation

Barium forms in asymptotic giant branch stars through the s-process, where slow neutron capture builds heavy elements. Barium-enhanced stars provide astronomical laboratories for studying nucleosynthesis and galactic chemical evolution over billions of years.

General Safety: Barium should be handled with standard laboratory safety precautions including protective equipment and proper ventilation.

Severe
Toxicity Warning

POISON: Soluble Barium compounds are extremely toxic!

Barium chloride, nitrate, and hydroxide can cause fatal poisoning at doses as low as 1-2 grams. Symptoms include vomiting, diarrhea, muscle paralysis, heart arrhythmias, and respiratory failure leading to death.

Cardiovascular
Dangers

Barium poisoning primarily affects the cardiovascular and nervous systems.

It blocks potassium channels in cell membranes, causing
dangerous heart rhythm abnormalities, muscle weakness, and paralysis.
Emergency treatment requires immediate potassium supplementation and cardiac monitoring.

Safe Compound Exception

Barium sulfate is remarkably safe due to its complete insolubility in water and biological fluids. Used safely in millions of medical X-ray procedures, it passes through the digestive system unchanged. However, never confuse it with soluble Barium salts which are deadly.

Radioactive Barium Hazards

Barium-140 and other radioactive isotopes pose dual threats from both chemical

toxicity and radiation exposure.
These isotopes concentrate in bones like calcium, causing long-term radiation damage and increased cancer risk.

Metallic Barium Reactivity

Metallic Barium ignites spontaneously in air and reacts

explosively with water, producing hydrogen gas and caustic Barium hydroxide.
Store under inert gas or mineral oil. Metal fires require special extinguishers - never use water!

Emergency Procedures

For Barium poisoning: immediate medical attention is critical. Administer activated charcoal if conscious, induce vomiting only if instructed by poison control, and prepare for cardiac monitoring and potassium therapy. Contact emergency services immediately - minutes can mean the difference between life and death.

Workplace Safety

Industrial workers handling Barium compounds must use full respiratory protection, chemical-resistant gloves, and eye protection. Maintain strict hygiene protocols, shower after exposure, and never eat or drink in work areas containing Barium materials.

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