The chemical formula for talc is Mg3Si4O10(OH)2.
Physical Properties of Talc:
| Properties |
Details |
| Cleavage |
Perfect basal cleavage (sheets or flakes) |
| Color |
White, gray, or pale green |
| Crystal System |
Monoclinic |
| Density |
2.7 – 2.8 g/cm³ |
| Hardness |
1 (Mohs scale) |
| Luster |
Pearly or greasy |
| Melting Point |
Approximately 1500°C |
| Specific Gravity |
2.7 – 2.8 |
| Streak |
White |
| Transparency |
Translucent to opaque |
Chemical Properties of Talc:
| Properties |
Details |
| Absorption |
Absorbs oils and moisture |
| Acid Resistance |
Resistant to most acids |
| Alkali Resistance |
Generally unaffected by alkalis |
| Chemical Formula |
Mg3Si4O10(OH)2 |
| Composition |
Magnesium silicate |
| Flame Retardancy |
Talc has flame-retardant properties |
| pH |
Neutral to slightly alkaline |
| Reactivity |
Non-reactive |
| Solubility |
Insoluble in water and organic solvents |
| Thermal Stability |
Stable up to high temperatures |
Reactions of talc with Alkali Metal
| Alkali Metal |
|
reaction |
| Lithium (Li) |
|
2Li + ( talc ) react and convert into Li2SiO3 + 3Mg(OH)2 + H2 |
| Sodium (Na) |
|
2Na + ( talc ) react and convert into Na2SiO3 + 3Mg(OH)2 + H2 |
| Potassium (K) |
|
2K + ( talc ) react and convert into K2SiO3 + 3Mg(OH)2 + H2 |
| Rubidium (Rb) |
|
2Rb + ( talc ) react and convert into Rb2SiO3 + 3Mg(OH)2 + H2 |
| Cesium (Cs) |
|
2Cs + ( talc ) react and convert into Cs2SiO3 + 3Mg(OH)2 + H2 |
Reactions of talc with Alkaline Earth Metal
| Alkaline Earth Metal |
|
reaction |
| Beryllium (Be) |
|
Be + ( talc ) + 2H2O react and convert into BeSiO3 + 3Mg(OH)2 + H2 |
| Magnesium (Mg) |
|
no reaction occur hence no product formed |
| Calcium (Ca) |
|
no reaction occur hence no product formed |
| Strontium (Sr) |
|
no reaction occur hence no product formed |
| Barium (Ba) |
|
no reaction occur hence no product formed |
| Radium (Ra) |
|
no reaction occur hence no product formed |
Reactions of talc with Non-Transition Metal
| Non-Transition Metal |
|
reaction |
| Aluminum (Al) |
|
no reaction occur hence no product formed |
| Gallium (Ga) |
|
no reaction occur hence no product formed |
| Indium (In) |
|
no reaction occur hence no product formed |
| Tin (Sn) |
|
no reaction occur hence no product formed |
| Thallium (Tl) |
|
no reaction occur hence no product formed |
| Lead (Pb) |
|
no reaction occur hence no product formed |
| Bismuth (Bi) |
|
no reaction occur hence no product formed |
| Aluminum (Al) |
|
no reaction occur hence no product formed |
| Silicon (Si) |
|
no reaction occur hence no product formed |
Reactions of talc with Non-Metal
| Non-Metal |
|
reaction |
| Hydrogen (H) |
|
no reaction occur hence no product formed |
| Carbon (C) |
|
no reaction occur hence no product formed |
| Nitrogen (N) |
|
no reaction occur hence no product formed |
| Oxygen (O) |
|
no reaction occur hence no product formed |
| Fluorine (F) |
|
no reaction occur hence no product formed |
| Phosphorus (P) |
|
no reaction occur hence no product formed |
| Sulfur (S) |
|
no reaction occur hence no product formed |
| Chlorine (Cl) |
|
no reaction occur hence no product formed |
| Iodine (I) |
|
no reaction occur hence no product formed |
| Bromine (Br) |
|
no reaction occur hence no product formed |
Reactions of talc with Metalloid
| Metalloid |
|
reaction |
| Boron (B) |
|
no reaction occur hence no product formed |
| Silicon (Si) |
|
no reaction occur hence no product formed |
| Germanium (Ge) |
|
no reaction occur hence no product formed |
| Arsenic (As) |
|
no reaction occur hence no product formed |
| Antimony (Sb) |
|
no reaction occur hence no product formed |
| Tellurium (Te) |
|
no reaction occur hence no product formed |
| Polonium (Po) |
|
no reaction occur hence no product formed |
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