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Photonic crystal fibers (PCFs) are normally holey fibers, made of silica glass, which is opaque in the mid- and far- infrared spectral range 3-20 mu m. We have fabricated novel PCFs by multiple extrusions of silver halide (AgClxBr1-x) crystalline materials, which are highly transparent in this spectral range. These PCFs are composed of two solid materials: the core consists of pure AgBr (n = 2.16), and the cladding includes small diameter fiberoptic elements, made of AgCl (n = 1.98). These AgCl fiberoptic elements are arranged in two concentric hexagonal rings around the core. This structure gives rise to a cladding region of lower refractive index, thus ensuring total internal reflection. Flexible PCFs of outer diameter 1 mm and length of about 1 m were fabricated, and their optical properties were measured. Measurements of numerical aperture, laser power transmission and evanescent wave spectroscopy indicated that the PCFs behave like a core-clad structure. There was a good agreement between the results and those obtained by theoretical simulations. Silver halide PCFs would be extremely useful for IR laser power transmission, for IR radiometry and for IR spectroscopy.