News & Events

9th December Venue - K.R. Mangalam University

SBAS Organizes Guest Lecture on “Economic Significance of Clays as a Diagnostic Pathfinder Minerals” in Collaboration with Delhi University

A webinar on “Economic Significance of Clays as a Diagnostic Pathfinder Minerals” was organized by the School of Basic and Applied Science department on 13th December 2021 from 3:00 pm onwards on an online platform. 

SBAS Organizes Guest Lecture

The webinar was delivered by Dr. Rashmi Sharma from the Department of Geology, University of Delhi. Dr. Neeraj Kumari started the event by giving a brief introduction about the event and welcomed the expert by giving her introduction and contribution in the field of geology and research.

SBAS Organizes Guest Lecture

The main purpose of conducting this webinar is to aware the students of the naturally occurring clay minerals and their economic significance. The one-hour interactive session drew the attention of students as well as faculty members towards the geology of clay minerals and their importance.

Dr. Sharma started her lecture by introducing clay minerals which is natural earth material with plastic properties. It becomes cohesive when kneaded, expands when wet, shrinks when dry, and gains strength when fired. She highlighted in her presentation that clay and soil are different so, should not be confused. Soil is formed by the combination of clay, sand, humus (partially decayed vegetable matter), and various other minerals. Clay can be powder, liquid, plastic, leather hard and bone dry in its raw state (before it has been fired). Clays are generally formed due to chemical weathering of rocks. The clay minerals are found in a variety of minerals like silicates, carbonates, oxides and phosphates.  The use of clay for pottery, ceramics and clay figures had already been known by primitive people about 25000 years ago. In recent times, clay is used as adsorbent, decolouration agent, ion exchange, and molecular sieve catalyst.

She emphasized on two types of clay such as Illite and Smectite which are potentially promising materials for documenting and resolving a wide spectrum of genetic environment.

SBAS Organizes Guest Lecture

The only difference between these two clays is due to different interlayer ions which are present in the interlayer space of these clay minerals. The dominance of Illite suggests semi-arid conditions conducive to precipitation, sorption and adsorption of uranium ions while the dominance of smectite suggests adsorption of other metal ions.

The talk was very informative for students as well as faculties as after the talk, they get to know the applications of clay minerals in their daily life as well as they can utilize it for research purposes also.

In the end, Dr. Neeraj Kumari from the School of Basic and Applied Science gave a vote of thanks to the dignitary.