高純度な粉末状アモルファスホウ素は黒色を示すが、不純物が混じると茶色を示す: Lidin R. A. (1996). Inorganic substances handbook. New York: Begell House. p. 22; Zenkov,V. S.(2006).“Adsorption-chemical activity of finely-dispersed amorphous powders of brown and black boron used in synthesizing metal borides”.Powder Metallurgy and Metal Ceramics45(5–6): 279–282 (279).doi:10.1007/s11106-006-0076-z.; Loryan,V. E.;Borovinskaya,I. P.;Merzhanov,A. G.(2011).“On combustion of boron in nitrogen gas”.International Journal of Self-Propagating High-Temperature Synthesis20(3): 153–155.doi:10.3103/S106138621103006X.; Kanel,G. I.;Utkin,A. V.;Razorenov,S. V.(2009).“Rate of the energy release in high explosives containing nano-size boron particles”(PDF).Central European Journal of Energetic Materials6(1): 15–30 (18).http://www.wydawnictwa.ipo.waw.pl/cejem/vol-6-1-2009/Kanel.pdf.
α-正方晶ホウ素の構造の想定が初めて報告されたのが1943年であり、炭化ホウ素もしくは窒化ホウ素の基板上に薄膜を蒸着させることによって初めて純粋なα-正方晶ホウ素のみを合成した報告がなされたのが1973年である: Kunzmann, P. M. (1973). Structural studies on the crystal chemistry of icosahedral boron framework structure derivatives. PhD thesis. Cornell University; Amberger, E. (1981). "Elemental boron". In Buschbeck, K. C.. Gmelin handbook of inorganic and organometallic chemistry: B Boron, Supplement 2 (8th ed.). Berlin: Springer-Verlag. pp. 1–112 (60–61). ISBN3540934480.
Other (different) phase diagrams have been reported:, Shirai,K.(2010).“Electronic structures and mechanical properties of boron and boron-rich crystals (part 2)”.Journal of Superhard Materials2(5): 336–345 (337).doi:10.3103/S1063457610050059.; Parakhonskiy,G.;Dubrovinskaia,N.;Bykova,E.;Wirth,R.;Dubrovinsky,L.(2011).“Experimental pressure-temperature phase diagram of boron: resolving the long-standing enigma”.Scientific Reports1(96): 1–7 (2).Bibcode:2011NatSR...1E..96P.doi:10.1038/srep00096.
Lundström, T (2009). "The solubility in the various modifications of boron". In Zuckerman, J. J.; Hagen, A. P. (eds.). Inorganic reactions and methods. Vol. 13: The formation of bonds to group-I, -II, and -IIIB elements. New York: John Wiley & Sons. pp.196–97. ISBN0470145498。
Lai-Sheng Wang et al.(2014).“Planar hexagonal B36 as a potential basis for extended single-atom layer boron sheets”.NATURE COMMUNICATIONS5.doi:10.1038/ncomms4113.
D. R. Lide (ed)(2003).“Section 4, Properties of the Elements and Inorganic Compounds; Melting, boiling, and critical temperatures of the elements”.CRC Handbook of Chemistry and Physics, 84th Edition.Boca Raton, Florida:CRC Press
A. W. Laubengayer; D. T. Hurd; A. E. Newkirk; J. L. Hoard(1943).“Boron. I. Preparation and properties of pure crystalline boron”.Journal of the American Chemical Society65(10): 1924.doi:10.1021/ja01250a036.
V. L. Solozhenko, O. O. Kurakevych and A. R. Oganov(2008).“On the hardness of a new boron phase, orthorhombic γ-B28”.Journal of Superhard Materials30(6): 428–429.doi:10.3103/S1063457608060117.
Hoard,J. L.;Hughes,R. E.(1967).“Chapter 2: Elementary boron and compounds of high boron content: Structure, properties and polymorphism”.InMuetterties, E. L..The chemistry of boron and its compounds.New York:John Wiley & Sons.pp.25–154 (29, 82)
Weintraub,E.(1911).“On the properties and preparation of the element boron”.The Journal of Industrial and Engineering Chemistry3(5): 299–301 (299).doi:10.1021/ie50029a007."Both in appearance and in its curved conchoidal fracture the lump and the broken-up pieces most nearly resemble black diamond…with an amorphous structure."
Laubengayer,A. W.;Brandaur,A. E.;Brandaur,R. L.(1942).“Progress in the preparation and determination of the properties of boron”.Journal of Chemical Education19(8): 382–85.Bibcode:1942JChEd..19..382L.doi:10.1021/ed019p382."Boron…shows a considerable tendency to assume the vitreous condition…Volatile compounds of boron such as the halides and the hydrides have been decomposed by passing their vapors through an arc or by bringing them in contact with a hot surface or filament. Boron of high purity is reported procurable by this method, but it is either a very fine powder or of vitreous structure."
J. L. Hoard; R. E. Hughes; D. E. Sands(1958).“The Structure of Tetragonal Boron”.Journal of the American Chemical Society80(17): 4507.doi:10.1021/ja01550a019.
van Setten M.J., Uijttewaal M.A., de Wijs G.A., de Groot R.A.(2007).“Thermodynamic stability of boron: The role of defects and zero point motion”.J. Am. Chem. Soc.129(9): 2458–2465.doi:10.1021/ja0631246.PMID17295480.
K. Ploog and E. Amberger(1971).“Kohlenstoff-induzierte gitter beim bor: I-tetragonales (B12)4B2C und (B12)4B2C2”.J. Less-Common Metals23: 33.doi:10.1016/0022-5088(71)90005-1.
Zarechnaya,E.Y.;Dubrovinsky,L.;Dubrovinskaia,N.;Miyajima,N.;Filinchuk,Y.;Chernyshov,D.;Dmitriev,V.(2008).“Synthesis of an orthorhombic high pressure boron phase”(free download).Science and Technology of Advanced Materials9(4): 044209‒12.Bibcode:2008STAdM...9d4209Z.doi:10.1088/1468-6996/9/4/044209.
Polian, A; Ovsyannikov, S. V.; Gauthier, M; Munsch, M; Chervin, J-C; Lemarchand, G (2010). "Boron and boron-rich solids at high pressures". In Boldyreva, E; Dera, P (eds.). High-pressure crystallography: From fundamental phenomena to technological applications: Proceedings of the NATO Advanced Study Institute on High-Pressure Crystallography: Advanced Armor Materials and Protection from Explosives, Erice, Italy, 4‒14 June 2009. Dordrecht: Springer Science+Business Media. pp.241‒250 (242). ISBN978904819257-1。
Delaplane,R.G.;Dahlborg,U.;Howells,W. S.;Lundström,T.(1988).“A neutron diffraction study of amorphous boron using a pulsed source”.Journal of Non-Crystalline Solids106(1–3): 66–69.Bibcode:1988JNCS..106...66D.doi:10.1016/0022-3093(88)90229-3.
S. Johansson et al.(1992).“Microfabrication of three-dimensional boron structures by laser chemical processing”.J. Appl. Phys.72(12): 5956.Bibcode:1992JAP....72.5956J.doi:10.1063/1.351904.
和書
F.A. コットン, G. ウィルキンソン『コットン・ウィルキンソン無機化学(上)』中原 勝儼(原書第4版)、培風館、1987年。ISBN4563041920。
Amberger,E.(1981).“Elemental boron”.InBuschbeck, K. C..Gmelin handbook of inorganic and organometallic chemistry: B Boron, Supplement 2(8th ed.).Berlin:Springer-Verlag.pp.1–112.ISBN3540934480
Donohue,J.(1982).The structures of the elements.Malabar, Florida:Robert E. Krieger.ISBN0898742307
Madelung,O.(1983).Landolt-Bornstein numerical data and functional relationships in science and technology. New series. Group III. Volume 17: Semiconductors. Subvolume e: Physics of non-tetrahedrally bonded elements and binary compounds I.Springer-Verlag: New York.ISBN0387117806
Nelmes,R. J.;Loveday,J. S.;Allan,D. R.;Besson,J. M.;Hamel,G.;Grima,P.;Hull,S.(1993).“Neutron- and x-ray-diffraction measurements of the bulk modulus of boron”.Physical Review B47(13): 7668–7673.Bibcode:1993PhRvB..47.7668N.doi:10.1103/PhysRevB.47.7668.
Sullenger,D. B.;Phipps,K. D.;Seabaugh,P. W.;Hudgens,C. R.;Sands,D. E.;Cantrell,J. S.(1969).“Boron modifications produced in an induction-coupled argon plasma”.Science163(3870): 935‒937.Bibcode:1969Sci...163..935S.doi:10.1126/science.163.3870.935.
Talley,C. P.;La Placa,S.;Post,B.(1960).“A new polymorph of boron”.Acta Crystallographica13(3): 271‒2.doi:10.1107/S0365110X60000613.