Zeolite or permutit has the formula

Options

A. ` MgAl_2 SiO _ 6 `
B. `NaAlO _ 2 `
C. `NaAl SiO _ 4 `
D. `Na _3 lSi_2 O_ 7`

Explanation

To solve the question regarding the formula of zeolite or permutit, we can follow these steps:

### Step 1: Understand what Zeolite or Permutit is
Zeolite, specifically permutit, is a type of aluminosilicate mineral that is often used in water softening and other applications. It is known for its ability to exchange ions.

### Step 2: Identify the chemical composition
Permutit is an artificial zeolite and is primarily composed of sodium, aluminum, and silicon. The general formula for zeolites can often be expressed in terms of sodium (Na), aluminum (Al), and silicon (Si) with oxygen (O) as well.

### Step 3: Write the general formula
The formula for permutit can be expressed as Na2Al2Si2O8. This can be simplified by factoring out common elements.

### Step 4: Simplify the formula
By factoring out common elements, we can rewrite the formula as NaAlSiO4. This indicates that for every sodium ion, there is one aluminum ion and one silicon ion, along with four oxygen atoms.

### Step 5: Compare with the options given
Now, we need to compare the derived formula NaAlSiO4 with the options provided:
1. MgAl2SiO6
2. NaAlO2
3. NaAlSiO4
4. Na3AlSi2O7

The option that matches our derived formula is **NaAlSiO4**.

### Conclusion
Thus, the correct answer is **NaAlSiO4**.

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