✔ 100% Money-Back Guarantee on Eligible Items
✔ Prices Displayed in Your Local Currency
✔ Final Price = No Surprise Import Fees
✔ Complimentary Insured Worldwide Shipping on Qualifying Orders
✔ Select Collector & Specialty Pieces May Require Secured Delivery Handling
by S. Devanarayanan (Author)
Ferroelectricity in crystals with preliminaries on Crystallography Atomic Bonding Lattice Vibrations Specific heats of Solids Thermal Expansion of Crystals Defect in Crystals
Author Biography
Prof. ( Dr.) S. DEVANARAYANAN, Ph.D. (IISc); D.Sc. (USA), Dip (Uppsala) Dr. S. Devanarayanan was educated at the University College, Thiruvananthapuram (1961 - 63), Indian Institute of Science, Bangalore (1963 - 70), and Institute of Physics, Uppsala, Sweden (1970 - 71). He had a brilliant academic career throughout. He was in the Faculty of the University of Kerala (1971 - 2000) and was the Professor & HOD of the Department of Physics, University of Kerala (1993 - 2000); and has 37 years of teaching / research experience in Physics and Materials Science.. He was Professor in the University of Puerto Rico (1989 - 91), Some 21 students have completed Ph.D. and M.Phil. under his supervision. He has to his credit over 80 published research papers in standard scientific periodicals. A monograph entitled THERMAL EXPANSION OF CRYSTALS (Pergamon, Oxford, 1979, also Kindle edition) and books "QUANTUM MECHANICS: Principles and Applications" (SciTech, 2005, 2010), QUANTUM CHEMISTRY (SciTech, 2013), PHYSICS IN A NUTSHELL (Amazon, 2016), A TEXT BOOK ON NUCLEAR PHYSICS (Amazon, 2016) and FERROELCTRICITY IN CRYSTALS (Amazon, 2016) were authored by him. He has served as a Professor in Physics at the University of Puerto Rico, USA, (1989 -91). He was awarded the SIDA Fellowship and worked at The Institute of Physics, Uppsala, Sweden (1970 - 71). A Life Member of various academic bodies like the IAPA Indian Physics Association, American Physical Society, American Chemical Society, and Founder Fellow of the Indian Cryogenic Council, his biography has found place a number of times in the publications of Marquis' Who's Who (USA) (2013)(2014), IBC (UK)(2011), ABC(USA) (2005), etc. The Govt. of Kerala appointed him as a member of the Commission of Enquiry on the working of the University of Kerala, in Oct 2000 - Mar 2001. He was in several Committees, Boards of Studies, Examinations and Selection Boards in different Universities, Faculty of Science, Academic Council of University of Kerala, Expert in State Level and National, UPSC competitive Tests. Prof. Devanarayanan has found honour in finding a name in the Star Chart, - Cat #TYC-7882-99-1- Scorpio Constellation- NASA- Feb 2013 -png. He had the special honour of being invited by the Royal Swedish Academy to submit proposals for the award of the Nobel Prize in Physics for 1995. He has made academic visits in 14 countries
- In stock, ready to ship
- ✔ Authenticity Guaranteed — Verified Designer Goods
- ✔ Sourced from Authorized European/U.S. Luxury Distributors
- ✔ Secure Checkout — SSL Encrypted Payments
- ✔ Fast Global Delivery — 3–11 Business Days
- ✔ Easy Returns on Eligible Items
- ✔ 100% Money-Back Guarantee — Full Refund if Not Satisfied
AUTHENTICITY GUARANTEED
Reserved for you — complete your purchase to secure this piece.
OFFICIALLY AUTHORIZED RESELLER
Discover Officially Authorized Authentic Items at STORE7994.com - Certificates Available on Request!
Independently verified for store quality and customer safety.
Trust score: 91/100
All designer items offered by STORE 7994 are sourced from trusted luxury distributors and verified through independent authentication services.
Learn how STORE 7994 authenticates luxury items
Guaranteed Authentic — Includes Brand Documentation & Third-Party Verification Options.
Shipping information
- Free Shipping* on all orders over $300 USD to most countries* Estimated delivery: 2-5 business days Mon-Sat to U.S., CA, EU etc.
- Tracking available: DHL Express
- Store 7994 Shipping policy
- Global delivery in 3–9 business days (location dependent).
- Free Worldwide Shipping $300+. International duties & VAT are calculated by destination country and may be collected upon delivery. UK orders are subject to 20% import VAT upon delivery.

Our innovation isn’t just in the brands we carry — it’s in the way we connect them. From our automation engine that keeps collections globally updated to our commitment to authenticity-first presentation, STORE 7994 exists where timeless design meets modern precision.
Every product we offer is:
Elevated · Intentional · Exclusive · Authentic
STORE 7994 is an authorized reseller of luxury fashion houses. Certificates and proof of authenticity are available to brand owners and partners upon request.
Returns & Refunds
We want you to shop with confidence at STORE 7994. If your purchase does not meet expectations, eligible items may be returned under the conditions below.
Return Eligibility
Items must be unused, unworn, and in original condition with all tags, packaging, and accessories included. Items showing any signs of wear or damage will not be accepted.
Return Window
Return requests must be made within 14 days of delivery.
Return Shipping
Customers are responsible for return shipping costs unless the item is defective, damaged, or incorrect.
Luxury Items
Items valued over $1,000 may be subject to a 7% restocking fee upon approved return.
Non-Returnable Items
For hygiene and product integrity reasons, the following items are final sale once opened or used:
• Underwear
• Fragrances
• Any worn or used items
Made-to-Order Items
Custom-designed products, including STORE 7994 hoodies, are made exclusively for each customer and are final sale. These items are not eligible for return or exchange unless defective or incorrect.
If you receive a defective or incorrect item, please contact us and we will make it right.
International Shipping & Duties
Many of our products ship directly from trusted international partners. Any applicable customs duties or import taxes are calculated at checkout and are non-refundable, even if the item is returned.
Returns & Associated Fees
All approved returns are subject to a $24 return processing fee. For international orders, duties, taxes, and return fees will be deducted from the original payment.
Shipping Policy
Complimentary shipping is offered on orders over $300. Orders below this threshold are subject to standard shipping rates at checkout.