Introduction-to-Zeolite-Minerals by cute guna .pptx

Introduction to zeolite group minerals by cute gunaseelan

1. ZEOLITE MINERAL 22UGL239216 GUNASEELAN G

2. INTRODUCTION TO ZEOLITE MINERAL Zeolites are a unique group of hydrated aluminosilicate minerals with a porous, crystalline structure. These versatile minerals have a wide range of applications due to their exceptional adsorption, ion exchange, and catalytic properties.

3. ZEOLITE

4. Megascopic properties Crystalline Structure : Zeolites exhibit well-defined, often cubic or octahedral crystal forms with internal channels and cavities. Varied Colors : Zeolites can range in color from colorless to shades of white, yellow, red, brown, and blue Glassy Luster : Many zeolite minerals have a striking glassy or vitreous luster due to their crystalline nature.

5. Fracture : uneven or conchoidal (Shell-like) Fracture. cleavage : Parallel to the crystal faces. (Perfect, Basal) Tenacity : Birrtle specific gravity : 2.0 to 2.8 Hardness : Range from 3 to 5.5 realively soft minerals.

6. Chemical Formula: M (AI02) (SiO2)x (H20)y M→Exchangable cations (Na, cat, K+) Alo₂→ Aluminium oxide Sio2 →silicon oxide X → indices no. of sio2 units related to Alo2. H20 →Water y → it varies depending on the specific zeolites its hydr ation state.

7. Chemical properties Zeolites are composed of silicon, aluminum, and oxygen, forming a 3D framework with exchangeable cations and water molecules. Composition : Ion Exchange : Zeolites can easily exchange their cations, making them useful for water softening, purification, and catalysis.

8. Optical properties High Refractive Index : Zeolites exhibit high refractive indices, which can lead to strong birefringence and optical phenomena. Pleochroism : Some zeolite varieties display pleochroism, showing different colors when viewed from different angles. Fluorescence : Certain zeolites can exhibit distinct fluorescence colors when exposed to ultraviolet light.

9. Natrolite chabazite H eulandite Stilbite Sodalites ZEOLITE GROUP MINERALS

10. NATROLITE Natrolite : Orthorhombic system) Natrolite's name derives from the greek words " natron " meaning sodium . Lithos Meaning “ stone” . Hardness :5 to 5.5 Colour : white, colourless, Fracture : Irregular, Un even cleavage : perfect PHYSICAL PROPERTIES : Tenacity : Brittle Luster : Vitreous, Diapheneiry : Transparent, Translucent Streak : White.

11. NATROLITE

12. Name is derived from the greek word ' chabazios " Which Refers to its rhombohedral crystal habit. CHABAZITE colour : colourless, white, yellow, pink, red Hardness : 4 to 5 Fracture : irregular / uneven Cleavage : Distinct Luster : vitreous to pearly Tenacity : Brittle Streak. : White Specific gravity : 2.10 2.2 PHYSICAL PROPERTIES

13. CHABAZITE

14. Heulandite is the name of a series of tecto-silicate minerals of the zeolite group. HEULANDITE Colour : colourless, yellow, green,white Hardness : 3.5 to 4 Fracture : irregular / uneven cleavage : perfect basal Luster : vitreous to Pearly Tenacity : Brittle Streak : White Specific gravity : 2.1 TO 2.2 PHYSIC AL PROPERTIES

15. HE ULANDITE

16. STILBITE Name derives from the greek word stilboe" Meaning" shining ". colour : White, yellow, pink, brown Hardness : 3.5 to 4 Fracture : irregular, uneven cleavage : perfect Luster : vitreous to pearly Streak : white PHYSIC AL PROPERTIES

17. STILBITE

18. The Name "Sodalite" derives from the latin sodalis", meaning " companion ", referring to its common association of sodium rich Minerals. SODALITE Colour : Blue, green, yellow, violet, white Hardness : 5 to 6 Fracture : Uneven Cleavage : indistinct cleavage Luster : vitreous to dull Tenacity : Brittle Streak : White. Sigraving : 2.1 to 2.3 Diaphaneity : Transparent to translucent. PHYSIC AL PROPERTIES

19. SODALITE

20. Geological Mode of Occurrences Volcanic Deposits : Zeolites often form in the cavities and vesicles of volcanic rocks, such as basalts and rhyolites. Sedimentary Deposits : Zeolites can also occur in sedimentary environments, formed by the alteration of volcanic ash or the precipitation from saline solutions. Hydrothermal Deposits : High-temperature hydrothermal solutions can crystallize zeolites in fractures, veins, and cavities within rocks.

21. Petrological Association Igneous Rocks : Zeolites are commonly found in basalts, rhyolites, and other igneous rocks that have undergone alteration. Metamorphic Rocks : Associated with low-grade Metamorphic rocks Where they from during the early stages of metamorphism at temperature of 50 200°C.

22. Sedimentary enviroments zeolitesCan from as a result of alternation of volcanic ash layers by alkaline groundwater reading to development Of zeolite beds Sedimentary Rocks :

23. Uses of Zeolites Water Purification : Zeolites are used for water softening, ion exchange, and the removal of heavy metals and organic compounds. Agriculture : Zeolites are used as soil amendments, slow-release fertilizers, and animal feed additives. Construction : Zeolites can be used as fillers, absorbents, and lightweight aggregates in construction materials.

24. Unique properties of zeolite Ion Exchange Capacity : Zeolites can easily exchange their cations, making them useful for water softening, purification, and catalysis. Thermal Stability : Many zeolites can withstand high temperatures without structural collapse, making them suitable for various high-temperature applications.

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