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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: 49° 35' 38,51" N, 9° 27' 51,07" 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. %)
38.02
2.44

8.48
1.61
8.19
0.19
17.73
15.06
2.58
1.87
0.74




96.91



Molecular
weight
60.08
79.88

101.96
159.69
71.85
70.94
40.31
56.08
61.98
94.2
141.95








Molecular
proportion
0.6328
0.0305

0.0832
0.0101
0.1167
0.0027
0.4398
0.2685
0.0416
0.0199
0.0052





1
ap











0.0174


0.0052





0.0052
328.68
1.71
4
il




0.0305



0.0305











0.0305
151.75
4.64
8
or´



0.1191


0.0199






0.0199






0.0199
556.67
11.05
9
ab´



0.2498


0.0416





0.0416







0.0416
524.46
21.83
10
an



0.0434


0.0217




0.0217








0.0217
278.21
6.03
13
mt







0.0101
0.0101











0.0101
231.54
2.33
14
zvyšky








0.0760

0.4398











15
di´



0.4590




0.0338

0.1957
0.2295








0.2295
221.21
50.76
17
hy´



0.2864




0.0422

0.2442









0.2864
105.04
30.08
20
ol´



0.1432




0.0422

0.2442









0.1432
149.99
21.48
22
ne



0.0833


0.0416





0.0416







0.0416
284.11
11.83
23
lc



0.0794


0.0199






0.0199






0.0199
436.50
8.67
25
cs



0.0877







0.1754








0.0877
172.24
15.10
25
di



0.1082




0.0338

0.1957
0.0541








0.0541
221.21
11.97
25
ol



0.2309




0.0422

0.2442









0.2309
149.99
34.63
Y: 1.1576
D: 0.5248
D1: 0.3816
D2: 0.3816
D3: 0.2151
D4: 0.1754
D5: 0.1754
D6: -0.0541
Mg/(Mg+Fe2+): 0.853
Total of normative wt. % 96.91

Comment

Chemical composition

-

SiO2
38.02TiO2
2.44Al2O3
8.48Fe2O3
1.61FeO
8.19MnO
0.19MgO
17.73CaO
15.06Na2O
2.58K2O
1.87P2O5
0.74LOI
1.20Total
98.11Mg(Mg/Fe2+)
0.79A/CNK
0.25A/NK
1.35

-

SiO2
36.74TiO2
2.28Al2O3
8.02Fe2O3
10.87FeO
0.00MnO
0.20MgO
18.91CaO
16.36Na2O
1.94K2O
0.68P2O5
0.86LOI
2.40Total
99.25Mg(Mg/Fe2+)
0.78A/CNK
0.24A/NK
2.04

-

SiO2
34.61TiO2
1.28Al2O3
7.49Fe2O3
11.71FeO
0.00MnO
0.21MgO
16.93CaO
17.56Na2O
1.36K2O
0.44P2O5
0.29LOI
7.47Total
99.35Mg(Mg/Fe2+)
0.74A/CNK
0.22A/NK
2.76

-

SiO2
36.48TiO2
4.25Al2O3
7.52Fe2O3
5.69FeO
7.78MnO
0.22MgO
13.78CaO
14.28Na2O
4.20K2O
2.53P2O5
1.01H2O+
0.91CO2
0.16SO3
0.22F
0.24Cl
0.05Total
99.21Mg(Mg/Fe2+)
0.76A/CNK
0.21A/NK
0.78

The Great Devil´s Wall, Ralská pahorkatina volcanic complex, Czech Republic - melilitite, sample KK10

SiO2
39.90TiO2
2.96Al2O3
9.99Fe2O3
11.5FeO
0.00MnO
0.18MgO
15.70CaO
13.00Na2O
2.31K2O
1.41P2O5
0.75LOI
1.40Total
99.20Mg(Mg/Fe2+)
0.73