TY - JOUR
T1 - Flamite, (Ca,Na,K)2(Si,P)O4, a new mineral from ultrahightemperature combustion metamorphic rocks, Hatrurim Basin, Negev Desert, Israel
AU - Sokol, E. V.
AU - Seryotkin, Y. V.
AU - Kokh, S. N.
AU - Vapnik, Ye
AU - Nigmatulina, E. N.
AU - Goryainov, S. V.
AU - Belogub, E. V.
AU - Sharygin, V. V.
N1 - Publisher Copyright:
© 2015 Mineralogical Society.
PY - 2015/1/1
Y1 - 2015/1/1
N2 - Flamite (Ca,Na,K)2(Si,P)O4 (P63; a = 43.3726(18), c = 6.8270(4) Å; V = 11122.2(9) Å3), a natural analogue of the P,Na,K-doped high-temperature α-Ca2SiO4 modification, is a new mineral from Ca-and Al-rich paralava, an ultrahigh-temperature combustion metamorphic melt rock. The type locality is situated in the southern Hatrurim Basin, the Negev Desert, Israel. Flamite occurs as regular lamellar intergrowths with partially hydrated larnite, together with rock-forming gehlenite, rankinite and Ti-rich andradite, minor ferrian perovskite, magnesioferrite, hematite, and retrograde ettringite and calcium silicate hydrates. The mineral is greyish to yellowish, transparent with a vitreous lustre, non-fluorescent under ultraviolet light and shows no parting or cleavage; Mohs hardness is 5-5; calculated density is 3.264 g cm-3. The empirical formula of holotype flamite (mean of 21 analyses) is (Ca1.82Na0.09K0.06(Mg,Fe,Sr,Ba)0.02)∑1.99(Si0.82P0.18)∑1.00O4. The strongest lines in the powder X-ray diffraction pattern are [d, Å (Iobs )]: 2.713(100), 2.765(44), 2.759(42), 1.762(32), 2.518(29), 2.402(23), 2.897(19), 1.967(18), 2.220(15), 1.813(15). The strongest bands in the Raman spectrum are 170, 260, 520, 538, 850, 863, 885, 952 and 1003 cm-1.
AB - Flamite (Ca,Na,K)2(Si,P)O4 (P63; a = 43.3726(18), c = 6.8270(4) Å; V = 11122.2(9) Å3), a natural analogue of the P,Na,K-doped high-temperature α-Ca2SiO4 modification, is a new mineral from Ca-and Al-rich paralava, an ultrahigh-temperature combustion metamorphic melt rock. The type locality is situated in the southern Hatrurim Basin, the Negev Desert, Israel. Flamite occurs as regular lamellar intergrowths with partially hydrated larnite, together with rock-forming gehlenite, rankinite and Ti-rich andradite, minor ferrian perovskite, magnesioferrite, hematite, and retrograde ettringite and calcium silicate hydrates. The mineral is greyish to yellowish, transparent with a vitreous lustre, non-fluorescent under ultraviolet light and shows no parting or cleavage; Mohs hardness is 5-5; calculated density is 3.264 g cm-3. The empirical formula of holotype flamite (mean of 21 analyses) is (Ca1.82Na0.09K0.06(Mg,Fe,Sr,Ba)0.02)∑1.99(Si0.82P0.18)∑1.00O4. The strongest lines in the powder X-ray diffraction pattern are [d, Å (Iobs )]: 2.713(100), 2.765(44), 2.759(42), 1.762(32), 2.518(29), 2.402(23), 2.897(19), 1.967(18), 2.220(15), 1.813(15). The strongest bands in the Raman spectrum are 170, 260, 520, 538, 850, 863, 885, 952 and 1003 cm-1.
KW - (CA,NA,K)(SI,P)O
KW - Combustion metamorphism
KW - Dicalcium silicate
KW - Flamite
KW - Hatrurim basin
KW - Larnite
KW - New Mineral
KW - α-CASIO
UR - http://www.scopus.com/inward/record.url?scp=84946041023&partnerID=8YFLogxK
U2 - 10.1180/minmag.2015.079.3.05
DO - 10.1180/minmag.2015.079.3.05
M3 - Article
AN - SCOPUS:84946041023
SN - 0026-461X
VL - 79
SP - 583
EP - 596
JO - Mineralogical Magazine
JF - Mineralogical Magazine
IS - 3
ER -