Datolite

UNB-2017-0003Minerals » Silicates

Description

Sample of short prismatic and wedge shaped euhedral Datolite crystals that are white with some yellowish tint and has a vitreous lustre. Largest crystal size: 0.3 cm x 0.4 cm x 0.6 cm. Datolite (CaBSiO4(OH)) can be greenish, yellowish, reddish, greyish, white or colourless and has either a vitreous, dull or greasy lustre. Streak is colourless and hardness is 5 to 5 1/2. Datolite is usually found as short prismatic to blunt wedge-shaped crystals but can also be botryoidal or fine-grained porcelain-like masses.

Specifications

Object name	Datolite
ID	UNB-2017-0003
Legal status	Permanent collection
Category	Mineral
Classification	Mineral group: Silicates
Composition	Ca2(Al,Fe)3(SiO4)3(OH) (Al,Fe2+,Fe3+Li,Mg,Mn,Ni)5−6(Al,Fe3+,Si)4(O,OH)18 K(Fe,Mg)3AlSi3O10(OH)2 BaTiSi3O9 (Mg,Fe)2Al3(Si5AlO18) (Ca,Fe,Mg)3Al2BO3Si4O12(OH) Be3Al2(Si6O18) MgSiO3 (Mg,Fe2+)5Al(Si3Al)O10(OH)8 Na2Fe2+5[Si12O30] (Na,Ca)Fe3+Si2O6 NaFe3+Si2O6 NaFe3+Si2O6 A0-1B2C5T8O22(OH,F,Cl)2 (Al,Fe)SiO4 Various (e.g., Muscovite - KAl2(AlSi3O10)(OH)2) Al2Si2O5(OH)4 Be3Al2(Si6O18) K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 NaAlSi2O6 Mg2Si2O6 Na(Li,Al)3Al6(BO3)3Si6O18(OH)4 Na15Ca6(Fe2+,Mn2+)3Zr3Si25O733(CO3) CaMgSi2O6 CaFeSi2O6 Ca2Al3(SiO4)3(OH) CaSiO3 Ca2(Mg,Fe2+,Fe3+,Al)5(Si,Al)8O22(OH)2 (Ca,Na)19(Al,Mg,Fe)13(SiO4)10(Si2O7)4(OH,F,O)10 Na2AlSi3O8·H2O Ca2(Mg5.0-4.5Fe2+0.0-0.5)Si8O22(OH)2 (Na,Ca)(Fe,Mg,Li,Al)3Al6(BO3)3(Si6O18)(OH)4 Ca2Al3(SiO4)3(OH) LiAlSi2O6 MnSiO3 (Mn,Fe)SiO3 ADSi2O6 Ca2Al(AlSi3O10)(OH)2·H2O (Ca,Na)(Mg,Fe)Si2O6 NaCa2Si3O8(OH)2H2O LiAlSi4O10 NaAl2(AlSi3O10)(OH)2 Mg2Mg5Si8O22(OH)2 D3[Si2O5](OH)4 Mg3(Si2O5)(OH)4 Be₃Al₂(SiO₃)₆ A(D3)G6(T6O18)(BO3)3X3Z (Mg,Al)8(Al,Si)6O20 SiO2 with variable amounts of water KAl2(AlSi3O10)(F,OH)2 Al2(SiO4)O
Origin	Patterson, New Jersey, U.S.A.
Pieces	1
Partial	No
Measurements	5cm x 10cm x 6cm

Map of Origin

Publications

Chesterman, C.W. 1979. Audubon Society, Field Guide to North American Rocks and Minerals. Knopf.