Red phosphor, method for producing red phosphor, white light source, illuminating device, and liquid crystal display device

1. A red phosphor containing an element A, europium (Eu), silicon (Si), carbon (C), oxygen (O) and nitrogen (N) in ratios of the numbers of atoms of the following compositional formula (1):

[Chemical Formula 6]

[A (m-x) Eu x ][Si (9-y) C y ]O n N [12-2(n-m)/3]   compositional formula (1)

where the element A is at least one of magnesium (Mg), calcium (Ca), strontium (Sr) and barium (Ba), and where m, x, y and n in the compositional formula (1) satisfy the relationships of 3<m<5, 0<x<1, 0<y<9 and 0<n<10,

wherein the ratio of the intensity of a peak existing at a position of the diffraction angle of 36.0° to 36.6° to that at a position of the diffraction angle of 35.0° to 36.0° in an X-ray diffraction pattern is 0.58 or higher.

2. The red phosphor according to claim 1 , wherein the alkali earth metal element A includes at least calcium (Ca) and strontium (Sr) and wherein,

with a ratio α of the number of atoms of Ca, a ratio β of the number of atoms of Sr and with a ratio γ of another element of the group II, the relationships (m=α+β+γ) and 0≦α/(α+β)≦0.3 are met.