Chemistry Reference
In-Depth Information
Table 1 continued.
Name
Formula
Oxides
Magnetite
Fe
3
O
4
Fe
+2
TiO
3
Amorphous Ilmenite
Amorphous Iron Oxide
Fe
2
O
3
Amorphous Manganese Oxide
Mn
3
O
4
Hydroxides & Hydrous Oxides
Goethite
α
-FeOOH
Lepidocrocite
γ
-FeOOH
Ferrihydrite
5Fe
2
O
3
·9H
2
O
(Mn
+2
CaMg)Mn
3
+4
O
7
·H
2
0
Todorokite
Birnessite
Na
4
Mn
14
O
27
·9H
2
O
Organic Crystals*
Earlandite
Ca
3
(C
6
H
5
O
2
)
2
·4H
2
O
Whewellite
CaC
2
O
4
·H
2
O
Weddelite
CaC
2
O
4
·(2+
X
)H
2
O (
X
<0.5)
Glushinskite
MgC
2
O
4
·4H
2
O
Manganese Oxalate (unnamed)
Mn
2
C
2
O
4
·2H
2
O
Sodium urate
C
5
H
3
N
4
NaO
3
Uric Acid
C
5
H
4
N
4
O
3
Ca tartrate
C
4
H
4
CaO
6
Ca malate
C
4
H
4
CaO
5
Paraffin Hydrocarbon
Guanine
C
5
H
3
(NH
2
)N
4
O
* by the convention of Lowenstam & Weiner (1989)
References: Lowenstam & Weiner (1989), Simkiss & Wilbur (1989), Mann (2001), Weiner and Addadi (2002)
Figure 1.
Comparison of calcite single crystals: (
left
) stereom of echinoderm and (
right
) synthetically
produced rhombohedral forms.
