...H. Sarp; Donald R. Peacor Abstract Jaffeite, ideally Ca 6 Si 2 O 7 (OH) 6 , is the natural analogue of the phase C 3 SH 1.5 (3CaO·SiO 2 ·1.5H 2 O; tricalcium silicate hydrate; TSH) that occurs as a component of cement. It is hexagonal, space group P 3 , with a = 10.026(5), c = 7.482(Å) Å, and Z = 2...

...E. Makovicky; L. Arnskov Olsen Abstract The hexagonal Al-rich high-pressure phases are members of a structural family with the same type of framework composed of double-ribbons of edge-sharing octahedra, but variably occupied trigonal and hexagonal channels. This family includes jaffeite...

.... , Krivovichev , S.V. , Spratt , J. , Stanley , C.J. , Turner , R.W. ( 2012 ): IMA (11-G): Plumbonacrite is revalidated. CNMNC Newsletter No. 14, October 2012, page 1288 ; Mineral. Mag . , 76 , 1281 – 1288 . Sarp , H. & Peacor , D.R. ( 1989 ): Jaffeite, a new...

... –1.44 HNontronite-K 0.01 –14.54 HNontronite-Na 0.53 –14.04 Illite-Fe II –0.39 –13.97 Jaffeite 4.41 –9.59 2.05 –14.14 –0.35 –13.41 –1.39 Jennite 6.65 –4.74 0.60 –11.19 –1.83 –10.12 –2.82 Lepidocrocite 1.81 0.92 Maghemite(disord...

... conditions ( Hu et al. , 2006 ): α-Ca 2 [SiO 3 (OH)](OH) (no mineral analogue), Ca 6 (Si 2 O 7 )(SiO 4 )(OH) 2 (dellaite), and Ca 2 (SiO 3 )(OH) 2 (hillebrandite). α-C 2 SH is stable at low temperature and starts to decompose at 180°C to jaffeite and finally to dellaite at 350°C. Hillebrandite was stable...

... corresponding to some other phases ( i.e. , afwillite or jennite, foshagite or jaffeite, mountainite, cebollite) were recognized, but the lack of positive X-ray identifications and the local occurrence of CaO – SiO 2 – H 2 O ± Al 2 O 3 gels of variable stoichiometry preclude a definitive statement...