Dana Classif. : |
Dana Code | : | 55.4.2.6 |
| Dana Class | : | 55 - Sorosilicate Minerals |
| Dana Type | : | 55.4 - Sorosilicates Sorosilicate Si2O7 Groups, Generally with No Additional Anions with cations in [8] and lower coordination |
| Dana Group | : | 55.4.2 - Fresnoite group |
| |
| Code | Mineral | Formula | H-M Symbol | Space Group |
| 55.4.2.1 | Fresnoite | Ba2TiSi2O8 | 4mm | P4bm |
| 55.4.2.2 | Hardystonite | Ca2ZnSi2O7 | -4 2m | P-421m |
| 55.4.2.3 | Jeffreyite | (Ca,Na)2(Be,Al)Si2(O,OH)7 | 2 2 2 | C2221 |
| 55.4.2.4 | Leucophanite | (Na,Ca)2BeSi2(O,OH,F)7 | 1 | P1 |
| 55.4.2.5 | Meliphanite | (Ca,Na)2Be[(Si,Al)2O6(F,OH)] | -4 | I-4 |
| 55.4.2.6 | Gugiaite | Ca2BeSi2O7 | -4 2m | P-421m |
| |
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Strunz Classif. : |
Strunz Code | : | VIII/C.02-30 |
| Strunz Class | : | VIII - Silicates |
| Strunz Type | : | VIII/C - Sorosilicates, with [Si2O7]6-, without anions unfamiliar to tetraheders |
| Strunz Group | : | VIII/C.02 - Melilite group |
| |
| Code | Mineral | Formula | H-M Symbol | Space Group |
| VIII/C.02-10 | Akermanite | Ca2MgSi2O7 | -4 2m | P-421m |
| VIII/C.02-14 | Okayamalite | Ca2B2SiO7 | -4 2m | P-421m |
| VIII/C.02-15 | Gehlenite | Ca2Al(AlSi)O7 | -4 2m | P-421m |
| VIII/C.02-30 | Gugiaite | Ca2BeSi2O7 | -4 2m | P-421m |
| VIII/C.02-40 | Hardystonite | Ca2ZnSi2O7 | -4 2m | P-421m |
| VIII/C.02-50 | Leucophanite | (Na,Ca)2BeSi2(O,OH,F)7 | 1 | P1 |
| VIII/C.02-60 | Jeffreyite | (Ca,Na)2(Be,Al)Si2(O,OH)7 | 2 2 2 | C2221 |
| VIII/C.02-70 | Meliphanite | (Ca,Na)2Be[(Si,Al)2O6(F,OH)] | -4 | I-4 |
| VIII/C.02-80 | Barylite | BaBe2Si2O7 | mm2 | Pn21a |
| VIII/C.02-90 | Andremeyerite | BaFe(Fe++,Mn,Mg)Si2O7 | 2/m | P21/c |