38
Sr
Strontium

Strontium

Element 38 • Alkaline Earth Metal
Atomic Mass 87.620000
Electron Config Unknown
Group/Period 2/5

Overview

ANALYZED
Strontium is the brilliant red flame element that lights up fireworks displays and helps doctors see inside your bones! This soft, silvery alkaline earth metal burns with one of the most intense and beautiful red colors in chemistry, making it absolutely essential for pyrotechnics and signal flares. Named after the Scottish village of Strontian where it was first discovered, Strontium has become indispensable for both celebration and medical diagnosis. Discovered in 1790 by Irish scientist Adair Crawford while analyzing a mysterious mineral from lead mines near Strontian, Scotland, Strontium was initially confused with barium due to their similar properties. The mineral, later called strontianite, contained a new earth (oxide) that produced different flame colors than any known substance. Pure metallic Strontium wasn't isolated until 1808 by Sir Humphry Davy using electrolysis. What makes Strontium absolutely spectacular is its pyrotechnic properties. Strontium compounds burn with an incredibly intense, pure red flame that can be seen for miles. This makes Strontium nitrate and Strontium carbonate essential ingredients in red fireworks, emergency flares, and military signal devices. The red color is so distinctive and bright that it's used in tracer bullets and distress signals. Strontium has revolutionized medical imaging through Strontium-90, which is used to treat eye diseases and bone cancer. More importantly, Strontium ranelate has been used as a medication to treat osteoporosis, helping strengthen bones and reduce fracture risk. The element's similarity to calcium allows it to be incorporated into bone structure. Here's something both fascinating and concerning: radioactive Strontium-90 from nuclear weapons testing and accidents accumulates in bones like calcium, making it one of the most
dangerous radioactive contaminants.
However, stable Strontium is completely safe and even beneficial in small amounts.

Physical Properties

MEASURED
Atomic Mass
87.620000 u
Melting Point
1050.00 °C
Boiling Point
1655.00 °C
Ionization Energy
5.70 kJ/mol

Special Properties

CLASSIFIED
STABLE Generally safe to handle with standard precautions

Applications

CATALOGUED

Strontium: The Fireworks Star

Strontium creates the brilliant red colors that illuminate celebrations worldwide, while its unique properties enable advanced ceramics, medical imaging, and specialized glass applications requiring exceptional performance characteristics.

Pyrotechnic Applications

Strontium carbonate and nitrate produce pure red flames in fireworks, flares, and signal devices. The characteristic 460.7 nm emission line creates the intense red color essential for patriotic displays, emergency signaling, and military applications where color recognition is critical.

Ceramic and Glass Technology

Strontium ferrite magnets provide cost-effective permanent magnet solutions for motors, speakers, and magnetic assemblies. Strontium titanate ceramics exhibit high dielectric constants essential for capacitor applications and microwave electronics.

Medical Applications

Strontium-89 radiotherapy treats bone cancer pain through targeted radiation delivery to bone tissue, while Strontium ranelate pharmaceuticals help prevent osteoporotic fractures by promoting bone formation and reducing bone resorption.

Common Uses

INDEXED

Strontium: Color and Function

  • Entertainment & Safety
    • Fireworks and celebration displays
    • Emergency flares and signal devices
    • Military tracer ammunition
    • Marine distress signals
  • Electronics & Magnetics
    • Permanent magnets for motors and speakers
    • Ceramic capacitors and electronic components
    • Microwave and radar applications
    • Magnetic assemblies and sensors
  • Medical Treatment
    • Bone cancer pain management
    • Osteoporosis treatment medications
    • Nuclear medicine procedures
    • Radioisotope therapy applications
  • Specialized Glass
    • Television picture tube glass (historical)
    • Optical glass and lenses
    • Radiation shielding glass
    • High-performance glass ceramics

Natural Occurrence

SURVEYED

Strontium: Calcium's Companion

Strontium occurs naturally in celestite (SrSO₄) and strontianite (SrCO₃) minerals, typically associated with sedimentary deposits and hydrothermal systems. Major deposits occur in Turkey, Spain, and Mexico, with celestite being the primary commercial source.

Discovery

ARCHIVED
1790

The Scottish Mineral

William Cruickshank discovered strontium in 1787 while analyzing strontianite mineral from lead mines near Strontian, Scotland. Humphry Davy first isolated pure strontium metal in 1808 through electrolysis, naming it after its discovery location.

Safety Information

CRITICAL

Strontium Safety: Generally Safe

Strontium compounds exhibit low

toxicity, though radioactive isotopes require special handling.
Standard laboratory safety procedures prevent exposure to Strontium dusts and solutions.

Safety Measures

Dust control measures and basic personal protective equipment provide adequate protection for most Strontium applications. Radioactive isotopes require radiation safety protocols and specialized disposal procedures.

Knowledge Database

Essential information about Strontium (Sr)

Strontium is unique due to its atomic number of 38 and belongs to the Alkaline Earth Metal category. With an atomic mass of 87.620000, it exhibits distinctive properties that make it valuable for various applications.

Strontium has several important physical properties:

Melting Point: 1050.00 K (777°C)

Boiling Point: 1655.00 K (1382°C)

State at Room Temperature: solid

Atomic Radius: 215 pm

Strontium has various important applications in modern technology and industry:

Strontium: The Fireworks Star

Strontium creates the brilliant red colors that illuminate celebrations worldwide, while its unique properties enable advanced ceramics, medical imaging, and specialized glass applications requiring exceptional performance characteristics.

Pyrotechnic Applications

Strontium carbonate and nitrate produce pure red flames in fireworks, flares, and signal devices. The characteristic 460.7 nm emission line creates the intense red color essential for patriotic displays, emergency signaling, and military applications where color recognition is critical.

Ceramic and Glass Technology

Strontium ferrite magnets provide cost-effective permanent magnet solutions for motors, speakers, and magnetic assemblies. Strontium titanate ceramics exhibit high dielectric constants essential for capacitor applications and microwave electronics.

Medical Applications

Strontium-89 radiotherapy treats bone cancer pain through targeted radiation delivery to bone tissue, while Strontium ranelate pharmaceuticals help prevent osteoporotic fractures by promoting bone formation and reducing bone resorption.

1790

The Scottish Mineral

William Cruickshank discovered strontium in 1787 while analyzing strontianite mineral from lead mines near Strontian, Scotland. Humphry Davy first isolated pure strontium metal in 1808 through electrolysis, naming it after its discovery location.

Discovered by: <div class="discovery-content"> <h3>The Scottish Mineral</h3> <p><strong>William Cruickshank</strong> discovered strontium in 1787 while analyzing strontianite mineral from lead mines near Strontian, Scotland. <strong>Humphry Davy</strong> first isolated pure strontium metal in 1808 through electrolysis, naming it after its discovery location.</p> </div>

Year of Discovery: 1790

Strontium: Calcium's Companion

Strontium occurs naturally in celestite (SrSO₄) and strontianite (SrCO₃) minerals, typically associated with sedimentary deposits and hydrothermal systems. Major deposits occur in Turkey, Spain, and Mexico, with celestite being the primary commercial source.

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

Strontium Safety: Generally Safe

Strontium compounds exhibit low

toxicity, though radioactive isotopes require special handling.
Standard laboratory safety procedures prevent exposure to Strontium dusts and solutions.

Safety Measures

Dust control measures and basic personal protective equipment provide adequate protection for most Strontium applications. Radioactive isotopes require radiation safety protocols and specialized disposal procedures.

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