In the case of glass for a door, this is rare. Some people may put a length of glass on one side of the main door so that they can see through it to know who a visitor is, but the visitor cannot see inside. I have also seen some main doors with a stained glass purely for decorative purposes. I don't think in India, though, many people put glass panes on doors placed within doorways indoors within the home, other than on the large doors leading to the balcony or terrace areas. In fact, most homes have curtains in doorways rather than doors, other than those leading to rooms where total privacy is required.
In the case of windows, I do not exactly know the names of the types of glass but I would suggest keeping a few things in mind when selecting it for a duplex home. Firstly, you need to check the direction the windows are facing. Are they, for example, constantly going to be exposed directly to the sun for a greater part of the day? In such a case, you will need to opt for the type of glass which will reduce the glare and reflect the heat off it rather than increasing the heat entering the home.
Secondly, if there is a lot of breeze coming in the direction towards the windows, you can put a louvered glass. This helps to keep the interior cool. Talking of louvered glass, you could try a louvered glass window at opposite ends of the same interior space, such as a large living room. These can even be placed in smaller windows above the main windows. This will ensure cross-ventilation. In case of fear of rats entering through the louvered panes, you can put a mesh wire over the window frame from the inside. The mesh wire can be installed in a way that it can be removed when the panes need to be cleaned.
Thirdly, consider strong winds during the monsoon season. Such winds can easily result in the glass cracking, especially if the duplex home is on a higher floor of an apartment building and is not an independent house.
Finally, if the duplex home is in a noisy area where there is constant traffic, you could consider installing thicker, soundproof glass windows. These will also be useful during noisy festivals!
One thing I have noted is that a majority of new homes have sliding glass windows and no separate ventilator windows at the top. Thus, essentially when you slid shut the windows, you are shutting out all fresh air. The earlier style of two individual windows or a single large window which one could keep open on a latch also seems to have been tossed out. This is unfortunate, as these earlier styles not only lasted longer but also had thick glasses which kept in privacy and kept out a good amount of outside sounds. The problem with the sliding glass windows of today is that after a couple of months the runners on which they are installed tend to rust and requires frequent maintenance. So, perhaps, you could consider having proper double glass windows which open outward and can be closed inward.
When you make a commitment, you create hope. When you keep a commitment you create trust! ~ John C. Maxwell