CHEMICAL ANALYSES CONVERTOR
from the
PANGLOSS FOUNDATION
compiled by
Pat Wilde
Version: May 2005
Select Element of Analysis
and click to bring up conversion tables
Source: Modified from American Geological Institute Data Sheet 18
Compiled by Stevens, R. E., Neil, S. T. and Robertson, C. E.: U. S. Geological Survey.
Additional values from the Chemical Rubber Handbook.
Click on Mineral Icon for list of minerals for specific element from webmineral.com
Click on Home Icon to return to Element Selection Table.
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Please send suggestions, corrections, comments to
Pat Wilde
Formula
Weight
Ag-Silver
Reported Value
as
Equilvalent
Weight
107.88
Ag To
Ag
107.88
143.377
AgCl To
AgCl
143.377
231.76
Ag
2
O To
Ag
2
O
115.88
Formula
Weight
Al-Aluminium
Reported Value
as
Equilvalent
Weight
26.98
Al To
Al
8.99
101.96
Al
2
O
3
To
Al
2
O
3
16.993
78.00
Gibbsite
Al(OH)
2
277.41
Anorthite
CaAl
2
Si
2
O
8
278.33
Orthoclase
KAlSi
3
O
8
398.31
Muscovite
KAl
3
Si
3
O
10
(OH)
2
218.25
Leucite
KAlSi
2
O
6
417.26
Phlogopite
KMg
3
Al
3
Si
10
(OH)
2
433.53*
Biotite
(3)
146.08
Nephelite
NaAlSiO
4
Augite
(3)
947.32*
Hornblende
(3)
263.02
Albite
NaAlSi
3
O
8
Formula
Weight
As-Arsenic
Reported Value
as
Equilvalent
Weight
74.91
As To
As
24.97 (3+); 14.982 (5+)
229.82
As
2
O
5
To
As
2
O
5
197.82
Arsenolite
To
As
2
O
3
246.04
Orpiment
As
2
S
3
AsO
4
As
2
S
5
Formula
Weight
B-Boron
Reported Value
as
Equilvalent
Weight
10.82
B To
B
3.607
69.64
B
2
O
3
To
B
2
O
3
11.61
381.37
Borax
Na
2
B
4
O
7
*10 H
2
O
Formula
Weight
Ba-Barium
Reported Value
as Ba
Equilvalent
Weight
137.36
Ba To
Ba
68.68
153.36
BaO To
BaO
76.68
197.34
Witherite
BaCO
3
233.39
Barite
BaSO
4
Formula
Weight
Be-Beryllium
Reported Value
as
Equilvalent
Weight
9.013
Be To
Be
4.507
25.013
BeO To
BeO
12.507
537.50
Beryl
Be
3
Al
2
Si
6
O
18
Formula
Weight
Bi-Bismuth
Reported Value
as
Equilvalent
Weight
209.00
Bi To
Bi
69.67
465.96
Bismite
To
Bi
2
O
3
77.67
Bi
2
S
3
Formula
Weight
Br-Bromine
Reported Value
as
Equilvalent
Weight
79.916
Br To
Br
79.916
O Equivalence
Cl Equivalence
F Equivalence
Formula
Weight
C-Carbon
Reported Value
as
Equilvalent
Weight
12.011
C To
C
3.003
44.011
CO
2
To
CO
2
11.003
60.011
CO
3
To
CO
3
30.006
61.019
HCO
3
To
HCO
3
61.019
197.34
Witherite
BaCO
3
100.09
Calcite
CaCO
3
184.40
Dolomite
CaMg(CO
3
)
2
84.31
Magnesite
MgCO
3
Formula
Weight
Ca-Calcium
Reported Value
as
Equilvalent
Weight
40.08
Ca To
Ca
20.04
56.08
CaO
CaO
28.04
110.99
CaCl
2
55.50
100.09
Calcite
CaCO
3
50.05
78.08
Fluorite
CaF
2
162.12
Ca(HCO
3
)
2
Ca(HCO
3
)
2
81.06
136.15
Anhydrite
CaSO
4
68.07
172.18
Gypsum
CaSO
4
2H
2
O
277.41
Anorthite
CaAl
2
Si
2
O
8
184.40
Dolomite
CaMg(CO
3
)
2
216.55
Diopside
CaMgSi
2
O
6
Augite
(3)
947.32*
Hornblende (3)
509.12
Apatite
Ca
5
(PO4)
3
F
116.16
Wollanstonite
CaSiO
3
Formula
Weight
Cd -Cadmium
Reported Value
as
Equilvalent
Weight
112.41
Cd To
Cd
56.21
128.41
CdO To
CdO
64.21
144.48
Greenockite
CdS
Formula
Weight
Ce-Cesium
Reported Value
as
Equilvalent
Weight
140.13
Ce To
Ce
46.71 (3+); 35.03 (4+)
Ce
2
O
3
54.71
CeO
2
43.03
Formula
Weight
Cl-Chlorine
Reported Value
as
Equilvalent
Weight
35.457
Cl To
Cl
34.457
58.44
Halite
NaCl
74.55
Sylvite
KCl
CaCl
2
MgCl
2
O Equivalence
Formula
Weight
Co -Cobalt
Reported Value
as
Equilvalent
Weight
58.94
Co To
Co
29.47
74.94
CoO To
CoO
37.47
Formula
Weight
Cr -Chromium
Reported Value
as
Equilvalent
Weight
52.01
Cr To
Cr
17.34
152.02
Cr
2
O
3
To
Cr
2
O
3
25.34
Formula
Weight
Cs -Cesium
Reported Value
as
Equilvalent
Weight
132.91
Cs To
Cs
132.91
281.82
Cs
2
O To
Cs
2
O
140.91
Formula
Weight
Cu-Copper
Reported Value
as
Equilvalent
Weight
63.54
Cu To
Cu
63.54 (1+); 31.77 (2+)
143.08
Cu
2
O To
Cu
2
O
71.74
79.54
CuO To
CuO
39.77
Cu
2
S
CuS
Formula
Weight
F - Fluorine
Reported Value
as
Equilvalent
Weight
19.00
F To
F
19.00
78.07
Fluorite
CaF
2
O Equivalent
Formula
Weight
Fe-Iron
Reported Value
as
Equilvalent
Weight
55.85
Fe To
Fe
27.93 (2+); 18.62 (3+)
71.85
FeO To
FeO
35.93
231.55
Magnetite
Fe
3
O
4
159.70
Hematite
Fe
2
O
3
119.98
Pyrite
FeS
2
203.78
Fayalite
Fe
2
SiO
4
232.32
Ferrosilite
FeSiO
3
151.73
Ilmenite
FeTiO
3
Augite 3
947.32*
Hornblende 3
323.32
Hypersthene 3
Siderite
FeCO
3
Formula
Weight
Ga -Gallium
Reported Value
as
Equilvalent
Weight
69.72
Ga To
Ga
23.24
187.44
Ga
2
O
3
To
Ga
2
O
3
31.24
Formula
Weight
Ge -Germanium
Reported Value
as
Equilvalent
Weight
72.60
Ge To
Ge
18.15
104.60
GeO
2
To
GeO
2
26.15
Formula
Weight
H-Hydrogen
Reported Value
as
Equilvalent
Weight
1.008
H To
H
1.008
18.016
H
2
O To
H
2
O
9.008
O
OH
Formula
Weight
Hf -Hafnium
Reported Value
as
Equilvalent
Weight
178.50
Hf To
Hf
44.63
210.50
HfO
2
To
HfO
2
52.63
Formula
Weight
Hg -Mercury
Reported Value
as
Equilvalent
Weight
200.61
Hg To
Hg
200.61 (1+); 100.31 (2+)
232.66
Cinnabar
HgS
HgCl
Hg
2
O
Hg
2
S
HgCl
2
HgO
Formula
Weight
I -Iodine
Reported Value
as
Equilvalent
Weight
126.91
I To
I
126.91
O Equivalent
Formula
Weight
In -Indium
Reported Value
as
Equilvalent
Weight
114.82
In To
In
38.27
210.50
In
2
O
3
Formula
Weight
K-Potassium
Reported Value
as
Equilvalent
Weight
39.100
K To
K
39.100
94.20
K
2
O To
K
2
O
47.10
74.577
Sylvite
KCl
74.557
101.11
Niter
KNO
3
101.11
278.33
Orthoclase
KAlSi
3
O
8
398.31
Muscovite
KAl
3
Si
3
O
10
(OH)
2
218.25
Leucite
KAlSi
2
O
6
417.26
Phlogopite
KMg
3
Al
3
Si
10
(OH)
2
433.53*
Biotite
(3)
K
2
CO
3
KHCO
3
Formula
Weight
La -Lanthanum
Reported Value
as
Equilvalent
Weight
138.92
La To
La
46.31
325.84
La
2
O
3
54.31
Formula
Weight
Li -Lithium
Reported Value
as
Equilvalent
Weight
6.940
Li To
Li
6.940
29.88
Li
2
O To
Li
2
O
14.94
186.09
Spodumene
LiAlSi
2
O
6
Formula
Weight
Mg-Magnesium
Reported Value
as
Equilvalent
Weight
24.32
Mg To
Mg
12.16
40.32
MgO To
MgO
20.16
84.33
Magnesite
MgCO
3
42.17
58.32
Brucite
Mg(OH)
2
216.55
Diopside
CaMgSi
2
O
6
417.26
Phlogopite
KMg
3
Si
3
O
10
(OH)
2
Augite 3
947.32*
Hornblende 3
140.69
Forsterite
(3)
200.78
Enstatite
(3)
232.32
Hypersthene
(3)
95.21
Chloromagnesite
MgCl
2
47.62
Mg(HCO
3
)
2
73.18
Formula
Weight
Mn-Manganese
Reported Value
as
Equilvalent
Weight
54.34
Mn To
Mn
27.43 (2+); 18.31 (3+); 13.74 (4+)
70.94
MnO To
MnO
35.47
158.33
Bixbyite
Mn
2
O
3
26.31
86.94
Pyrolusite
MnO
2
21.74
Formula
Weight
Mo-Molybendum
Reported Value
as
Equilvalent
Weight
95.95
Mo To
Mo
23.99 (4+); 15.99 (6+)
143.95
MoO
3
To
MoO
3
23.99
160.07
Molybdenite
MoS
2
Formula
Weight
N-Nitrogen
Reported Value
as
Equilvalent
Weight
14.008
N To
N
4.669 (3+); 2.802 (5+)
17.032
NH
3
17.032
18.040
NH
4
+
18.040
46.008
NO
2
-
46.008
62.008
NO
3
-
62.008
HNO
3
N
2
O
5
Formula
Weight
Na-Sodium
Reported Value
as
Equilvalent
Weight
22.991
Na To
Na
22.991
61.98
Na
2
O To
Na
2
O
30.99
58.448
Halite
NaCl
58.448
263.02
Albite
NaAlSi
3
O
8
-
146.08
Nepheline
NaAlSiO
4
105.99
Na
2
CO
3
53.00
84.01
NaHCO
3
84.01
85.00
NaNO
3
85.00
Formula
Weight
Nb -Niobium
Reported Value
as
Equilvalent
Weight
92.91
Nb To
Nb
18.582
265.82
Nb
2
O
5
26.582
Formula
Weight
Ni -Nickel
Reported Value
as
Equilvalent
Weight
58.71
Ni To
Ni
29.36
74.71
NiO
37.36
Formula
Weight
O -Oxygen
Reported Value
as
Equilvalent
Weight
16.00
O To
O
8.00
79.916
Br Equivalent
35.457
Cl Equivalent
19.00
F Equivalent
126.91
I Equivalent
32.066
S Equivalent
78.96
Se Equivalent
127.61
Te Equivalent
Formula
Weight
P-Phosphorus
Reported Value
as
Equilvalent
Weight
30.975
P To
P
6.195
94.975
PO
4
3-
To
PO
4
3-
31.658
141.95
P
2
O
5
To
P
2
O
5
14.195
509.12
Apatite
Ca
5
(PO
4
)
3
F
Formula
Weight
Pb-Lead
Reported Value
as
Equilvalent
Weight
207.21
Pb To
Pb
103.61
223.21
PbO To
PbO
111.61
239.28
Galena
PbS
119.64
303.28
Anglesite
PbSO
4
151.64
Formula
Weight
Rb-Rubidium
Reported Value
as
Equilvalent
Weight
85.48
Rb To
Rb
85.48
186.96
Rb
2
O To
Rb
2
O
93.48
Formula
Weight
S-Sulphur
Reported Value
as
Equilvalent
Weight
32.066
S To
S
16.033 (2-); 8.017 (4+); 5.344 (6+)
64.066
SO
2
To
SO
2
16.017
80.066
SO
3
SO
3
13.344
96.066
SO
4
2-
SO
4
2-
48.033
119.98
Pyrite
FeS
2
CaSO
4
K
2
SO
4
Na
2
SO
4
H
2
S
O Equivalent
Formula
Weight
Sb -Antomony
Reported Value
as
Equilvalent
Weight
121.76
Sb To
Sb
40.59 (3+); 30.44 (4+); 24.35 (5+)
339.70
Stibnite
Sb
2
S
3
291.52
Sb
2
O
3
49.59
307.52
Sb
2
O
4
38.44
323.52
Sb
2
O
5
64.70
Formula
Weight
Sc -Scandium
Reported Value
as
Equilvalent
Weight
44.96
Sc To
Sc
14.99
137.92
Sc
2
O
3
22.99
Formula
Weight
Se-Selenium
Reported Value
as
Equilvalent
Weight
78.96
Se To
Se
19.74 (4+); 13.16 (6+)
110.96
SeO
2
To
SeO
2
27.74
126.96
SeO
3
To
SeO
3
21.16
O Equivalent
Formula
Weight
Si -Silicon
Reported Value
as
Equilvalent
Weight
28.09
Si To
Si
7.02
60.79
Quartz
To
SiO
2
15.023
SiO
4
4-
Formula
Weight
Sn -Tin
Reported Value
as
Equilvalent
Weight
118.70
Sn To
Sn
58.35 (2+); 29.68 (4+)
134.70
SnO to
SnO
67.63
150.70
Cassiterite
SnO
2
37.68
Formula
Weight
Sr -Strontium
Reported Value
as
Equilvalent
Weight
87.63
Sr To
Sr
43.815
103.63
SrO to
SrO
51.815
Strontianite
SrCO
3
Celestite
SrSO
4
Formula
Weight
Ta-Tantalum
Reported Value
as
Equilvalent
Weight
180.95
Ta To
Ta
36.19
441.90
Ta
2
O
5
44.19
Formula
Weight
Te-Technetium
Reported Value
as
Equilvalent
Weight
127.61
Te To
Te
31.90 (4+); 21.27 (6+)
159.61
TeO
2
39.90
175.61
TeO
3
29.27
O Equivalent
Formula
Weight
Th-Thorium
Reported Value
as
Equilvalent
Weight
232.05
Th To
Th
58.01
264.05
ThO
2
66.01
Formula
Weight
Ti -Titanium
Reported Value
as
Equilvalent
Weight
204.39
Ti To
Ti
204.39
79.30
Rutile
To
TiO
2
19.98
151.73
Ilmenite
FeTiO
3
Formula
Weight
U-Uranium
Reported Value
as
Equilvalent
Weight
238.07
U To
U
59.53 (4+); 39.68 (6+)
270.07
UO
2
To
UO
2
67.52
843.21
U
3
O
8
To
U
3
O
8
52.64
UO
3
Formula
Weight
V-Vanadium
Reported Value
as
Equilvalent
Weight
50.95
V To
V
16.98 (3+); 10.19 (5+)
149.30
V
2
O
3
To
V
2
O
3
24.98
181.90
V
2
O
5
To
V
2
O
5
18.19
VO
4
2-
VO
4
3-
Formula
Weight
W-Tungsten
Reported Value
as
Equilvalent
Weight
183.86
W To
W
30.64
231.86
WO
3
To
WO
3
38.64
Formula
Weight
Y-Yttrium
Reported Value
as
Equilvalent
Weight
88.92
Y To
Y
29.64
225.84
Y
2
O
5
To
Y
2
O
5
37.64
Formula
Weight
Zn-Zinc
Reported Value
as
Equilvalent
Weight
65.38
Zn To
Zn
32.69
81.38
ZnO To
ZnO
40.69
97.46
Sphalerite
ZnS
Formula
Weight
Zr -Zirconium
Reported Value
as
Equilvalent
Weight
91.22
Zr To
Zr
22.805
123.22
ZrO
2
to
ZrO
2
30.805
183.31
Zircon
ZrSiO
4