Nitride fluorescent material, method of producing nitride fluorescent material and light emitting device

A nitride fluorescent material comprising silicon nitride particles comprising Eu, at least one alkaline earth metal selected from the group consisting of Mg, Ca, Sr, and Ba, Al, and fluorine in a composition of the silicon nitride particles,

• wherein the silicon nitride particles have a needle degree, which is an average of a ratio of major diameter to minor diameter, ranging from 1.4 to 1.8, a volume average particle diameter of 10 μm or more, and a molar content ratio of fluorine atom to Al of 6×10−2 or less,
• wherein the silicon nitride particles have a composition represented by formula (I) below:
• MasSrtEuuSivAlwNxOyFz (I)
• wherein Ma is at least one element selected from the group consisting of Ca, Ba and Mg, and s, t, u, v, w, x, y, and z satisfy 0<s≤1, 0≤t<1, 0<u≤0.04, 0.8≤s+t+u≤1.1, 0.8≤v≤1.2, 0.8≤w≤1.2, 1.8≤v+w≤2.2, 2.5≤3.2, 0≤y≤0.5, 0<z≤0.06, and 2.5≤x+y+z≤3.2.