Roggianite (original) (raw)
RI values:
_n_ω = 1.527(1) _n_ε = 1.535(1)
δ = 0.008
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Crystal System:
Tetragonal
Class (H-M):
4/m m m _(_4/_m_2/_m_2/m ) - Ditetragonal Dipyramidal
Cell Parameters:
a = 18.33(2) Å, c = 9.16(1) Å
Unit Cell V:
3,077.66 ų (Calculated from Unit Cell)
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0014856 | Roggianite | Giuseppetti G, Mazzi F, Tadini C, Galli E (1991) The revised crystal structure of roggianite: Ca2[Be(OH)2Al2Si4O13]<2.5H2O Neues Jahrbuch fur Mineralogie, Monatshefte 1991 307-314 | 1991 | Val Vigezzo, Novara, Italy | 0 | 293 |
CIF Raw Data - click here to close
Place of Conservation of Type Material:
University of Modena, Modena, Italy; National School of Mines, Paris, France; National Museum of Natural History, Washington, D.C., USA, 122280.
Associated Minerals at Type Locality:
Reference:
Passaglia E. (1969) Roggianite, a new silicate mineral. Clay Minerals: 8: 107-111.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
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