The simplified formula is Ba 4 Na 3 Ti 3 Si 4 O 14 (PO 4 ,SO 4 ) 2 (O,F) 3 . The mineral is triclinic, space group P \\\(\\\overline 1 \\\) or P 1. The unit cell dimensions are a = 5.38, b = 7.10, c = 14.76 Å; α = 99.00°, β = 94.94°, γ = 90.14...
Zinkgruvanite is also closely compositionally related to yoshimuraite, Ba4Mn4Ti2(Si2O7)2(PO4)2O2(OH)2, via the coupled heterovalent substitution 2 Ti4++ 2 (PO4)3-→2 Fe3++ 2 (SO4)2 but presents a different type of linkage. The new mineral probably formed during a late stage of...
(3.075).The simplified formula is Ba4Na3Ti3Si4O14(PO4,SO4)2(O,F)3.The mineral is triclinic,space group P1 or P1.The unit cell dimensions are a = 5.38,b = 7.10,c = 14.76 A;alpha = 99.00掳,beta = 94.94掳,gamma=90.14掳;and V = 555 A3,Z= 1.The strongest lines of the X-...