The double-helix model of DNA structure was first published in the journal Nature by James Watson and Francis Crick in 1953,[5] (X,Y,Z coordinates in 1954[6]) based on the work of Rosalind Franklin, including the crucial X-ray diffraction image of DNA labeled as "Photo 51", from 1952,[7] followed by her more clarified DNA image with Raymond Gosling,[8][9] Maurice Wilkins, Alexander Stokes, and Herbert Wilson,[10] and base-pairing chemical and biochemical information by Erwin Chargaff.[11][12][13][14][15][16] The prior model was triple-stranded DNA.[17]