Contents:

• J. L. Jambor, A. L. Roberts, and J. D. Grice - Armstrongite from the Strange Lake Alkalic Complex, on the Quebec- Labrador Boundary, Canada (2)
• A. Zeichner - Identification of Beta-Tungsten in a Heavily Blackened, Burned Out, Vehicle Headlamp by X-Ray Powder Diffraction (5)
• G. Brown, I. G. Wood, and L. Nicholls - Thermal and Mechanical Instabilities in the Alignment of Bragg-Brentano Parafocussing Powder Diffractometers (7)
• G. Kimmel - High Quality X-Ray Diffraction Data Using an Adjustable Divergence Slit and Thin Samples (22)
• S. E. Rasmussen and B. Lundtoft - Crystal Data for Pb₇Bi₃, a Superconducting epsilon-Phase in the Pb-Bi System (28)
• S. E. Rasmussen and B. Lundtoft - New Crystal Data for Mo_.63Ru_.37 (Mo₅Ru₃) A Superconducting Sigma Phase (29)
• Á. Griger - Powder Diffraction Data for the alpha_H Intermetallic Phases with Slight Variation in Composition in the System Al-Fe-Si (31)
• M. Auray, M. Quarton, and P. Tarte - Crystal Data for Two Molybdates M^IV(MoO₄)₂ With M^IV = Zr, Hf (36)
• D. F. Mullica and E. L. Sappenfield - X-Ray Diffraction Data for Lu(OH)₃ (39)
• H. F. McMurdie et al. - Standard X-Ray Diffraction Powder Patterns from the JCPDS Research Associateship (41)
• Departments
• Calendar of Meetings (53)
• Meeting Reports (55)
• JCPDS-ICDD Subcommittee Activities (56)
• Short Courses and Workshops (58)
• Book Reviews (59)
• General Announcements (60)
• Letter to the Editor (62)
• Computer Comments (64)
• Commercial Announcements (65)
• Volume 1, 1986
• Contents (67)
• Author Index (69)