## Zn

Zn zinc

## Zn

The symbol for zinc

- Calcium ferrite, magnesium ferrite and zinc ferrite, ROFe203(R=Ca, Mg,
**Zn**), are obtained by intensely heating mixtures of the oxides; magnesium ferrite occurs in nature as the mineral magnoferrite, and zinc ferrite as franklinite, both forming black octahedra. - +
**Zn**(n -I) a n_ 1=**Zn**(n+3) -2 (without which the transformation would be illusory); and the conclusion is that a 1, a 2, ... - Considering the curves of the order n which satisfy
**Zn**(n+3) - 1 conditions, then the index N is the number of these curves which pass through a given arbitrary point. - FRANKLINITE, a member of the spinel group of minerals, consisting of oxides of iron, manganese and zinc in varying proportions, (Fe,
**Zn**, Mn)"(Fe, Mn) 2"'0 4. - If U is the velocity of sound in a gas at pressure P with density p, and if waves of length X and frequency N are propagated through it, then the distanc?e l between the dust-heaps is 2 = N -
**zN**Vyp' where y is the ratio of the two specific heats.

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