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Department of Mineralogy and Petrology
Faculty of Natural Sciences
Comenius University in Bratislava

Category: Plutonic

Type

Commons

Name origin

Locality

GPS: 50° 37' 0" N, 15° 16' 0" E

Major minerals

Accessory minerals

Classification

 - Macro  - Classification

Colour

Structure

Granularity

Texture

Alterations

Petrographic characteristics

Usage

Literature

Photomicrographs

 - Micro 1  - Micro 2  - Micro 3  - Micro 4

Normative composition

Step of calculation
Normative minerals



SiO2
TiO2
ZrO2
Al2O3
Fe2O3
FeO
MnO
MgO
CaO
Na2O
K2O
P2O5
F
S
CO2

Total
Molar proportion of normative mineral
Molecular mass of normative mineral
Weight % of normative mineral



Oxide
(wt. %)
43.08
0.03

2.99
1.11
7.50
0.12
42.23
2.01
0.04
0.01





99.12



Molecular
weight
60.08
79.88

101.96
159.69
71.85
70.94
40.31
56.08
61.98
94.20









Molecular
proportion
0.7170
0.0004

0.0293
0.0070
0.1061
0.0017
1.0476
0.0358
0.0006
0.0001






4
il




0.0004



0.0004











0.0004
151.75
0.06
8
or



0.0006


0.0001






0.0001






0.0001
556.67
0.06
9
ab



0.0039


0.0006





0.0006







0.0006
524.46
0.34
10
an



0.0571


0.0286




0.0286








0.0286
278.21
7.95
13
mt







0.0070
0.0070











0.0070
231.54
1.61
14
zvyšky








0.0987

1.0476











15
di



0.0145




0.0006

0.0066
0.0073








0.0073
219.28
1.59
17
hy´



1.1391




0.0981

1.0410









1.1391
103.11
117.45
20
ol



0.4983




0.0429

0.4553









0.4983
146.12
72.81
20
hy



0.1426




0.0552

0.5856









0.1426
103.11
14.70
Y: 1.2153
D: 0.4983
Mg/(Mg+Fe2+): 0.914
Total of normative wt. % 99.12

Comment

Chemical composition

-

SiO2
43.08
TiO2
0.03
Al2O3
2.99
Fe2O3
1.11
FeO
7.50
MnO
0.12
MgO
42.23
CaO
2.01
Na2O
0.04
K2O
0.01
P2O5
n.d.
LOI
n.d.
H2O+
n.d.
H2O-
n.d.
Total
99.12
Mg(Mg/Fe2+)
0.91

-

SiO2
43.84
TiO2
0.07
Al2O3
1.28
Fe2O3
1.12
FeO
7.44
MnO
0.22
MgO
42.33
CaO
1.99
Na2O
0.07
K2O
0.01
P2O5
n.d.
LOI
n.a.
H2O+
0.44
H2O-
0.16
Total
98.97
Mg(Mg/Fe2+)
0.91

-

SiO2
43.60
TiO2
0.13
Al2O3
2.46
Fe2O3
11.33
MnO
0.14
MgO
40.10
CaO
2.21
Na2O
0.21
K2O
0.01
P2O5
0.02
LOI
0.47
Total
100.61
Mg(Mg/Fe2+)
0.88

-

SiO2
43.80
TiO2
0.12
Al2O3
3.01
Fe2O3
9.48
MnO
0.13
MgO
39.17
CaO
3.18
Na2O
0.21
K2O
0.06
P2O5
0.01
LOI
0.03
Total
99.14
Mg(Mg/Fe2+)
0.89