Mentors Comments:
China has threatened to curb the export of rare earth minerals to the US as the trade war between the world’s two largest economies escalates, The Asian country is the world’s largest producer and consumer of rare earth minerals.
In a few introductory lines define Rare earth minerals – Rare earth elements (REE) are a group of seventeen chemical elements that occur together in the periodic table, 15 lanthanides (Z=57 through 71), Scandium and Yttrium.
Discuss the following aspects in the answer:
- What are rare earth minerals? Why are they called rare earth minerals?
- What is the significance of Rare Earth Elements (REE)?
- Discuss its utility in terms of – defense, strategy environment, etc.
- Global Uses and Production of Rare Earth Elements
- What are the issues involved?
- Aspect of China? – why and what is the turf?
Conclude with their significance and what needs to be done to overcome the challenges involved therein.
Answer:
The rare earth minerals (REM) are a set of seventeen metallic elements. These include the fifteen lanthanides on the periodic table in addition to scandium and yttrium that show similar physical and chemical properties to the lanthanides. The REMs have unique catalytic, metallurgical, nuclear, electrical, magnetic and luminescent properties. While named ‘rare earth’, they are in fact not that rare and are relatively abundant in the Earth’s crust
Strategic importance of REMs:
- They have distinctive electrical, metallurgical, catalytic, nuclear, magnetic and luminescent properties.
- They are strategically very important due to their use of emerging and diverse technologies that cater to the needs of current society.
- Its usage range from daily use (e.g., lighter flints, glass polishing mediums, car alternators) to high-end technology (lasers, magnets, batteries, fiber-optic telecommunication cables).
- Even futuristic technologies need these REMs (For example high-temperature superconductivity, safe storage and transport of hydrogen for a post-hydrocarbon economy, environmental global warming and energy efficiency issues).
- The global demand for REMs has increased significantly in line with its expansion into high-end technology, environment, and economic areas.
- They are extremely important for many modern technologies, including consumer electronics, computers, and networks, communications, clean energy, advanced transportation, health care, environmental mitigation, national defense, etc.
- Due to their unique magnetic, luminescent, and electrochemical properties, they help in technologies perform with reduced weight, reduced emissions, and energy consumption; therefore give them greater efficiency, performance, miniaturization, speed, durability, and thermal stability.
Applications of REMs in various fields:
- Electronics: Television screens, computers, cell phones, silicon chips, monitor displays, long-life rechargeable batteries, camera lenses, light-emitting diodes (LEDs), compact fluorescent lamps (CFLs), baggage scanners, marine propulsion systems.
- Defense Sector: Rare earth elements play an essential role in our national defense. The military uses night-vision goggles, precision-guided weapons, communications equipment, GPS equipment, batteries, and other defense electronics. These give the United States military an enormous advantage. Rare earth metals are key ingredients for making the very hard alloys used in armored vehicles and projectiles that shatter upon impact.
- Renewable Energy: Solar panels, Hybrid automobiles, wind turbines, next-generation rechargeable batteries, bio-fuel catalysts.
- Manufacturing: High strength magnets, metal alloys, stress gauges, ceramic pigments, colorants in glassware, chemical oxidizing agent, polishing powders, plastics creation, as additives for strengthening other metals, automotive catalytic converters
- Medical Science: Portable x-ray machines, x-ray tubes, magnetic resonance imagery (MRI) contrast agents, nuclear medicine imaging, cancer treatment applications, and for genetic screening tests, medical and dental lasers.
- Technology: Lasers, optical glass, fiber optics, masers, radar detection devices, nuclear fuel rods, mercury-vapor lamps, highly reflective glass, computer memory, nuclear batteries, high-temperature superconductors.
However, the extraction of REMs is one of the most environmentally negative and toxic generating of all mining practices. Disproportionate rare earth mining has resulted in landslides, clogged rivers, environmental pollution emergencies, and even major accidents and disasters, causing great damage to people’s safety and health and the ecological environment.
The ‘Make in India’ program whose goal is to make India a manufacturing economy will need REMs in huge amounts. Although India is among the top five nations with reserves of rare-earth minerals, there is no required technology to extract in an environmentally sustainable way. Thus, India will need to firm up diplomatic trade channels and long-term supply contracts. There is also a need to develop suitable technologies, promote Research and Development to tap the REM.
Payment ID – MOJO9a25Y00D56176325
A very good answer Damini.
Your content is well suited for the demand of the question.
Your coverage is to the point and content is deep.
The explanation is short and crisp.
Good structure.
The main body of the answer is well attempted.
Very good presentation.
Even when discussing things through paragraphs, do use subheadings to show the direction of the discussion.
Language is fine.
MOJO9b04X00D25275001
The answer lacks proper discussion on the demands of the question.
The content is scattered with no explanation and week structure.
The utility and significance need to be explained in a better manner.
Read the model answer.
The 2nd part of the answer is missing from the answer.
These are the subheadings that you missed to discuss in the 2nd part:
Global Uses and Production of Rare Earth Elements
What are the issues involved?
Aspect of China? – why and what is the turf?
Always read the mentors comment to understand the depth of each part of the answer.
Try not to make your content look scattered. Use a better presentation and explanation.
MOJO9a31K00N58111047
A very good intro.
It is detailed and to the point.
The question stated: ” Discuss their uses from strategic, developmental and environmental perspective”
Therefore your main body should have been divided into these subsects and should have discussed the importance of REM wrt these pointers.
Good discussion on the Chinese issue.
What are the environmental issues involved?
Read the model answer for all the missing talking points.
The presentation is decent and the language is good.
MOJO9930Q00N64198657
The overall content is decent but the structuring of the 1st part could have been better.
The question stated: ” Discuss their uses from strategic, developmental and environmental perspective”
Therefore your main body should have been divided into these subsects and should have discussed the importance of REM wrt these pointers.
The rest of the answer is well discussed
The 2nd part of the answer is fine.
Avoid making flowchart side by side with another discussion.
This breaks the flow and makes it look postscripted.
Hence use the flowchart (if discussing the content) in the main body or make a box to make it look distinctive.
The overall content is decent with good explanation.
Very good way forwards.
payment ID – MOJO9a21ROON30518033
Good intro but could have divided it into two parts to make it smaller and a better structure for the answer.
Even when discussing things through paragraphs, do use subheadings to show the direction of the discussion.
Also, avoid lengthy paragraphs.
When making subheadings, highlight them prominently so that the examiner can gauge the direction of the discussion. The subheading should not be lost in the milieu of the discussion.
The question stated: ” Discuss their uses from strategic, developmental and environmental perspective”
Therefore your main body should have been divided into these subsects and should have discussed the importance of REM wrt these pointers.
The 2nd part of the answer is missing from the answer.
These are the subheadings that you missed to discuss in the 2nd part:
Global Uses and Production of Rare Earth Elements
What are the issues involved?
Aspect of China? – why and what is the turf?
Always read the mentors comment to understand the depth of each part of the answer.
Always underline imp stuff in your answers.
Overall content could have been structured and presented in a better manner.
Read the model answer for the missing talking points
Payment ID:MOJO9b01O00A90839766
Please review
Your coverage of the topic is on the right approach.
The discussion involves all the necessary headings and talking points.
The structure, right from the beginning till the end, is satisfactory and well presented.
The subsets of strategic, developmental, and environmental have decent content.
The 2nd part of the answer is well handled, with a decent explanation.
The language is fine in the overall answer.
MOJO9b03K00A07920521
The overall answer is well attempted.
The discussion is well-suited to the demand of the question.
The content is well structured.
The language is backed up by fine explanation in all the parts.
The depth is nice and the coverage is wide.
Nothing wrong in the attempt except need for a better way forward.
All in all, decent answer
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