Detail of "13477-39-9"

CAS Number:
13477-39-9
Name:
Metaphosphoricacid (HPO3), calcium salt (2:1)
Molecular Structure:
Formula:
Ca. 2 H O3 P
Synonyms:
Calciummetaphosphate (Ca(PO3)2) (6CI); Metaphosphoric acid (HPO3), calcium salt(8CI,9CI); Calcium bis(metaphosphate); Calcium dimetaphosphate (Ca(PO3)2);Calcium metaphosphate; Calcium phosphate (Ca(PO3)2)

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Reaction ammonium hydrogen phosphate with calcium carbonate during heating: Reaction ammonium hydrogen phosphate with calcium carbonate during heating. Millere, I.; Bielis, I.; Krastina, G. L. (USSR). Uch. Zap., Latv. Gos. Univ., 203, 115-23 (Russian) 1974. CODEN: UZLUA2. DOCUMENT TYPE: Journal CA Section: 57 (Ceramics) Section cross-reference(s): 67 CP (NH4)2HPO4 and CaCO3 were reacted at 190-850.degree.. The CaO content (related to P2O5) was 10-90%. A weak endothermic effect was obsd. on all DTA curves at 110-120.degree. which was caused by a gradual detaching of 1 mol NH4. In the reaction, CaHPO4 [7757-93-9] and Ca(HP2O6)2 [64540-03-0] formed at 190.degree. and Ca(PO3)2 [13477-39-9] formed at 350-500.degree.. The mixts. contg. 60-90% CaO and heated to 620.degree. formed .beta.-Ca2P2O7 [7790-76-3]. In mixts. contg. .ltoreq.50% CaO, Ca(PO3)2 was retained even at .ltoreq. 850.degree., while in the mixts. contg. 70-90% CaO, the .beta.-Ca3(PO4)2 [7758-87-4] was formed.

Fluoride-phosphate optical glasses: Fluoride-phosphate optical glasses. (Japan Optics Co., Ltd.In this study， 1314-36-9 and 13477-39-9 are also used., Japan). Jpn. Kokai Tokkyo Koho JP 59018133 A2 30 Jan 1984 Showa, 6 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C03C003-16; C03C003-18; C03C003-30. APPLICATION: JP 82-128281 22 Jul 1982. DOCUMENT TYPE: Patent CA Section: 57 (Ceramics) Fluoride-phosphate optical glasses have n 1.6-1.64 and Abbe no. 61-67, and contain metaphosphates 18-60 (Al(PO3)3 13-35, Zn(PO3)2 1-26, Ca(PO3)2 0-14, Ba(PO3)2 0-28), fluorides 5-43 (BaF2 1-34, MgF2 0-13, CaF2 0-5, SrF2 0-18, AlF3 0-13, LaF3 0-6), and oxides 18-65% (B2O3 1-13, BaO 9-42, La2O3 0-5, Y2O3 0-8, Yb2O3 0-12). Thus, an optical glass contg. B2O3 5, Al(PO3)3 32, Zn(PO3)2 9, MgF2 6, BaF2 10, BaO 32, and Yb2O3 6% had n 1.616, Abbe no. 64.17, and improved devitrification stability. .