A tantalum cube turns a specialist metal into something immediate. Dense, corrosion-resistant and far less familiar than metals such as copper or titanium, tantalum has a physical presence that makes its industrial reputation suddenly tangible.
Tantalum is the chemical element with atomic number 73. It is a dense, highly corrosion-resistant metal used where materials need to perform reliably in demanding environments. Most people encounter the results of those properties indirectly. A cube lets you encounter the material itself.
The 0.5-inch cube weighs 34g, while the 1kg tantalum cube measures approximately 39.2mm along each side. There is also a 1-inch size weighing 273g. The 0.5-inch tantalum cube is the most compact way into the collection.
Dense, but different from tungsten
Tantalum belongs at the heavier end of our metal cubes. It is dense enough to feel surprisingly substantial for its size, although our tungsten cubes concentrate still more mass into the same simple geometry.
That makes tantalum interesting on its own and even more revealing beside other metals. The cube is not trying to disguise the material with decoration. Its appeal is precisely that you can see, hold and compare tantalum in a form simple enough to let the element take centre stage.
Tantalum is particularly well suited to Project Atomic because it is important without being familiar. You may have benefited from products that rely on it without ever seeing the metal itself. Here, there is no component or casing around it. The material becomes the object.
The three sizes let you approach tantalum in different ways. The half-inch cube is a compact sample of an unfamiliar element; the 1-inch version makes its density much more obvious; the 1kg cube turns that same material into a genuinely substantial object.
Questions
What is tantalum?
Tantalum is a metallic chemical element with atomic number 73. It is dense, highly resistant to corrosion and able to form a stable protective oxide layer. Those properties make it useful in specialised applications and make a solid tantalum cube an unusual way to experience the material directly.
What is tantalum used for?
Tantalum is widely used in electronic components, particularly capacitors, and in specialised corrosion-resistant and high-temperature applications. Its usefulness comes from a combination of properties rather than one headline statistic, including corrosion resistance and stable electrical behaviour.
Is tantalum rare?
Tantalum is much less abundant in the Earth’s crust than common structural metals such as aluminium or iron, and commercial supply is comparatively limited. “Rare” can mean several things, so we avoid treating scarcity, geological abundance and consumer unfamiliarity as if they were the same claim.
Is tantalum expensive?
Tantalum is a specialist material with a smaller supply chain than common metals, and finished solid pieces can be costly. Project Atomic tantalum cubes start from £100. The final price also reflects the amount of material involved as cube size and mass increase.
Where is tantalum found?
Tantalum occurs naturally in mineral ores rather than as large pieces of pure metal. It is commonly recovered from tantalum-bearing minerals such as tantalite and columbite.
