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

Category: Volcanic

Type

Commons

Name origin

Locality

GPS: 38° 25' 8,39" N, 14° 57' 1,34" 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. %)
70.14
0.23

13.96
3.18
0.00
0.06
0.71
2.03
4.25
4.95
0.13




99.64



Molecular
weight
60.08
79.88

101.96
159.69
71.85
70.94
40.31
56.08
61.98
94.20
141.95








Molecular
proportion
1.1674
0.0029

0.1369
0.0199
0.0008
0.0008
0.0176
0.0362
0.0686
0.0525
0.0009





1
ap











0.0031


0.0009





0.0009
328.68
0.30
4
il




0.0008



0.0008











0.0008
151.75
0.13
4
ru




0.0020















0.0020
79.90
0.16
8
or



0.3153


0.0525






0.0525






0.0525
556.67
29.25
9
ab



0.4114


0.0686





0.0686







0.0686
524.46
35.96
10
an



0.0316


0.0158




0.0158








0.0158
278.21
4.40
13
hm







0.0199












0.0199
159.69
3.18
14
zvyšky








0.0000

0.0176
0.0173










15
di



0.0347




0.0000

0.0173
0.0173








0.0173
216.56
3.76
17
hy



0.0003




0.0000

0.0003









0.0003
100.39
0.03
18
q



0.3742
















0.3742
60.08
22.48
Y: 0.7933
D: -0.3742
Mg/(Mg+Fe2+): 1.000
Total of normative wt. % 99.64

Comment

Chemical composition

-

SiO2
70.14TiO2
0.23Al2O3
13.96Fe2O3
3.18FeO
0.00MnO
0.06MgO
0.71CaO
2.03Na2O
4.25K2O
4.95P2O5
0.13LOI
0.36Total
100.00Mg(Mg/Fe2+)
1.00A/CNK
0.86A/NK
1.13

-

SiO2
68.65TiO2
0.26Al2O3
14.30Fe2O3
3.58FeO
0.00MnO
0.08MgO
0.83CaO
2.39Na2O
4.32K2O
4.80P2O5
0.12LOI
0.66Total
99.99Mg(Mg/Fe2+)
1.00A/CNK
0.86A/NK
1.16