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AmphiCalc-1: Amp13RM (Ca hornblendes)

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Amp13RM – Amphibole compositions based on 13 cations without Na, K, Mn and Ca

Amp13RM allows the calculation of amphibole compositions based on 13 cations without sodium, potassium, manganese and calcium.
This 13 cation (- Na, K, Mn, Ca) method for amphibole calculation was proposed for the first time by Holland & Richardson (1979). The distribution of Ca and Na to the A and B (M4) positions is particularly suitable for Ca hornblendes. Here, too, the positions are filled according to LEAKE (1978).
By entering values into the \"% Fe₂O₃\" input-field, an iterative Fe³⁺ adjustment must be carried out until the sum of the valences equals 46.

Crossed hammers

Using microprobe analyses, Amp13RM can be used to automatically calculate amphibole compositions, the oxides, the cations, the lattice site occupancies, the values for divalent and trivalent iron (total iron, Fe²⁺, Fe³⁺) and more. The following diagrams are generated: Leake-diagram, ACF-diagram, AFM-diagram.
You can enter the values individually directly into the table below or use the input fields . Here you enter for up to 5 micas the values (oxides) as rows separated by single spaces (see placeholders; 200 characters max.). Note the order of the elements in the table: Na Mg Al Si K Ca Ti Mn Fe (total Fe as FeO) H₂O! Additionally, the sample designation must come first. You can use the period or the comma as a decimal separator.
Literature see bottom of page .

Technical note: Although the responsive design should work on all common screen sizes, this page is displayed best from a screen/window size of at least 1361px.

Amp13RM

Your amphiboles

You can also enter your data (oxides) here (into the light-blue fields). Here, you may also enter values for Fe₂O₃ manually.

Name
	Oxides	Oxides	Oxides	Oxides	Oxides
Na₂O
MgO
Al₂O₃
Fe₂O₃
SiO₂
K₂O
CaO
TiO₂
MnO
FeO
H₂O
V₂O₃
Total
FeO total

Calculation

Step 1: Fe³⁺-Determination

By manually entering values for the Fe₂O₃ content of total iron into the "% Fe₂O₃" fields, an iterative Fe³⁺ adjustment must be performed until the sum of the valences is 46 (the difference between the target and actual values must be 0). When entering values, please be sure to confirm the entries in the "% Fe₂O₃" field with the Enter or Tab key.

Notice: For the example data for amphiboles 1 to 4, values for the Fe₂O₃ content are already predefined (22.304%, 16.9%, 61.445%, and 25.019%). After clicking the "Calculation" button, the value for each valence should be 46, and the confirmation message "OK!" should appear. If this is not the case, please reload the page.

Enter Fe₂O₃ proportion of the total iron below		Valences (Required value: 46)		Difference between the target and actual values
Name	% Fe₂O₃	Valences	Valences	Difference	Check

Step 2: Calculation

Click the button to determine the Fe₂O₃ content of the total iron and to calculate the amphibole composition.

Constants and intermediate results

Element	Mol-Prop.	Wt.-%
Amphibole 1
Si
Ti
Al
V
Mg
Ca
Mn
Fe²⁺
Na
K
Fe³⁺
		Total
Fkt. O=23	FM
Amphibole 2
Si
Ti
Al
V
Mg
Ca
Mn
Fe²⁺
Na
K
Fe³⁺
		Total
Fkt. O=23	FM
Amphibole 3
Si
Ti
Al
V
Mg
Ca
Mn
Fe²⁺
Na
K
Fe³⁺
		Total
Fkt. O=23	FM
Amphibole 4
Si
Ti
Al
V
Mg
Ca
Mn
Fe²⁺
Na
K
Fe³⁺
		Total
Fkt. O=23	FM
Amphibol 5
Si
Ti
Al
V
Mg
Ca
Mn
Fe²⁺
Na
K
Fe³⁺
		Total
Fkt. O=23	FM

	Amphibol 1	Amphibol 2	Amphibol 3	Amphibol 4	Amphibol 5
Cation calculation (I)
Si
Ti
Al
Fe³⁺
V
Mg
Ca
Mn
Fe²⁺
Na
K
Total

	Amphibol 1	Amphibol 2	Amphibol 3	Amphibol 4	Amphibol 5
Cation calculation (II) – "Re-Calculation"
Si
Ti
Al
Fe³⁺
V
Mg
Ca
Mn
Fe²⁺
Na
K
Total
Valences
Total cations (I)
Total cations (II) (- Na, K, Ca, Mn)

Grid occupation

Amphibole 1>
Al oct.	Si on T		Al oct.	Si+Al+Cr (T)	Si+Al+V (T)
V Rest	Si+Al on T		V Rest	Fe³⁺ -"- (T)	Fe³⁺ -"- (T)
Fe³⁺ Rest	Space on T		Fe³⁺ Rest	V on T	V on T
	Fe³⁺ on T			Al on T	Al on T
Mg Rest	M1+M2		Mg Rest
	Mg on C
Fe²⁺ Rest	M1+M2+Mg		Fe²⁺ Rest
	Fe²⁺ on C
Mn²⁺ Rest	M1+M2+Mg+Fe²⁺		Mn²⁺ Rest
	Mn²⁺ on C
	M4
Na Rest on A	Mg+Fe+Mn+Ca		Na Rest on A
	Space on B
	Na on B
		ACF (Mol Prop.)
		A
		C
		F
		Σ
		AFM (Ms-Project)
		A
		F
		M
		Formula occupation
		T
		C (M1-M3)
		B (M4)
		A

Amphibole 2>
Al oct.	Si on T		Al oct.	Si+Al+Cr (T)	Si+Al+V (T)
V Rest	Si+Al on T		V Rest	Fe³⁺ -"- (T)	Fe³⁺ -"- (T)
Fe³⁺ Rest	Space on T		Fe³⁺ Rest	V on T	V on T
	Fe³⁺ on T			Al on T	Al on T
Mg Rest	M1+M2		Mg Rest
	Mg on C
Fe²⁺ Rest	M1+M2+Mg		Fe²⁺ Rest
	Fe²⁺ on C
Mn²⁺ Rest	M1+M2+Mg+Fe²⁺		Mn²⁺ Rest
	Mn²⁺ on C
	M4
Na Rest on A	Mg+Fe+Mn+Ca		Na Rest on A
	Space on B
	Na on B
		ACF (Mol Prop.)
		A
		C
		F
		Σ
		AFM (Ms-Project)
		A
		F
		M
		Formula occupation
		T
		C (M1-M3)
		B (M4)
		A

Amphibole 3>
Al oct.	Si on T		Al oct.	Si+Al+Cr (T)	Si+Al+V (T)
V Rest	Si+Al on T		V Rest	Fe³⁺ -"- (T)	Fe³⁺ -"- (T)
Fe³⁺ Rest	Space on T		Fe³⁺ Rest	V on T	V on T
	Fe³⁺ on T			Al on T	Al on T
Mg Rest	M1+M2		Mg Rest
	Mg on C
Fe²⁺ Rest	M1+M2+Mg		Fe²⁺ Rest
	Fe²⁺ on C
Mn²⁺ Rest	M1+M2+Mg+Fe²⁺		Mn²⁺ Rest
	Mn²⁺ on C
	M4
Na Rest on A	Mg+Fe+Mn+Ca		Na Rest on A
	Space on B
	Na on B
		ACF (Mol Prop.)
		A
		C
		F
		Σ
		AFM (Ms-Project)
		A
		F
		M
		Formula occupation
		T
		C (M1-M3)
		B (M4)
		A

Amphibole 4>
Al oct.	Si on T		Al oct.	Si+Al+Cr (T)	Si+Al+V (T)
V Rest	Si+Al on T		V Rest	Fe³⁺ -"- (T)	Fe³⁺ -"- (T)
Fe³⁺ Rest	Space on T		Fe³⁺ Rest	V on T	V on T
	Fe³⁺ on T			Al on T	Al on T
Mg Rest	M1+M2		Mg Rest
	Mg on C
Fe²⁺ Rest	M1+M2+Mg		Fe²⁺ Rest
	Fe²⁺ on C
Mn²⁺ Rest	M1+M2+Mg+Fe²⁺		Mn²⁺ Rest
	Mn²⁺ on C
	M4
Na Rest on A	Mg+Fe+Mn+Ca		Na Rest on A
	Space on B
	Na on B
		ACF (Mol Prop.)
		A
		C
		F
		Σ
		AFM (Ms-Project)
		A
		F
		M
		Formula occupation
		T
		C (M1-M3)
		B (M4)
		A

Amphibole 5>
Al oct.	Si on T		Al oct.	Si+Al+Cr (T)	Si+Al+V (T)
V Rest	Si+Al on T		V Rest	Fe³⁺ -"- (T)	Fe³⁺ -"- (T)
Fe³⁺ Rest	Space on T		Fe³⁺ Rest	V on T	V on T
	Fe³⁺ on T			Al on T	Al on T
Mg Rest	M1+M2		Mg Rest
	Mg on C
Fe²⁺ Rest	M1+M2+Mg		Fe²⁺ Rest
	Fe²⁺ on C
Mn²⁺ Rest	M1+M2+Mg+Fe²⁺		Mn²⁺ Rest
	Mn²⁺ on C
	M4
Na Rest on A	Mg+Fe+Mn+Ca		Na Rest on A
	Space on B
	Na on B
		ACF (Mol Prop.)
		A
		C
		F
		Σ
		AFM (Ms-Project)
		A
		F
		M
		Formula occupation
		T
		C (M1-M3)
		B (M4)
		A

	Amphibol 1	Amphibol 2	Amphibol 3	Amphibol 4	Amphibol 5
Intermediate cation occupation
Si
Al tetr.
V on T
Fe³⁺ tetr.
Total T
V Rest
Al oct.
Ca
Fe³⁺ Rest
Ti
Mg (M3)
Fe²⁺ (M3)
Mn²⁺ (M3)
Total C
Mg Rest
Fe²⁺ Rest
Mn²⁺ Rest
Ca
Na on B
Total B
Na Rest on A
K
Total A
Na on B
Mg/Mg²⁺+Fe²⁺
Fe³⁺/Fe³⁺+Al⁶⁺
Si on T

	Amphibol 1	Amphibol 2	Amphibol 3	Amphibol 4	Amphibol 5
Even more intermediate results (for control purposes)
F1
F100

SiO₂
TiO₂
Al₂O₃
V₂O₃
MgO
CaO
MnO
FeO
Na₂O
K₂O
Fe₂O₃
Total
Al tetr.
V tetr.
Fe³⁺ tetr.
M1+M2
Mg (M3)
Fe²⁺ (M3)
Mn²⁺ (M3)
Na (M4)
Na on B (M4)
Na on A
Mg, Fe, Mn, Na
Mg/Mg+Fe²⁺
Fe³⁺/Fe³⁺+Al⁶⁺
Mg+Fe+Mn+Ca (M4)
Fe₂O₃ init.
Fe₂O₃ new
Total (1) T
Total (2) T
Total (1) C
Total (2) C
Total (1) B
Total (2) B
Tetrahedron
C (M1-M3)
B (M4)
A
X Mg
X Fe³⁺
ln (Ca/Na) on B
Total A
Fe³⁺/Al
(Ca+Na)B
Classifikation
imma = Iron-magnesium-manganese amphibole; ca = Calcic amphibole; sca = Sodic-calcic amphibole; aa = Alkali amphibole

Results
Amphibole (23 oxygens)

	Amphibole 1	Amphibole 2	Amphibole 3	Amphibole 4	Amphibole 5
Fe₂O₃ re-calculation
Fe₂O₃ Initial
Fe₂O₃ New
Classification after Leake

Oxides
SiO₂
TiO₂
Al₂O₃
Fe₂O₃
V₂O₃
MgO
CaO
MnO
FeO
Na₂O
K₂O
Total
Cations (O=23)
Si
Ti
Al
Fe³⁺
V
Mg
Ca
Mn
Fe²⁺
Na
K
Total
Formula occupation
T
Si
Al
V
Fe³⁺
Total
C (6)
Al
V
Fe³⁺
Ti
Mg
Fe²⁺
Mn
Total
B
Mg
Fe²⁺
Mn
Ca
Na
Total
A
Na
K
Total
....
Na (B)
Mg/(Mg+Fe²⁺)
Fe³⁺/(Fe³⁺+Al⁶⁺)
Si/Cell
ln(Ca/Na)B
ACF
A
C
F
Total
AFM
A
F
M
Fe₂O₃ proportion of the total iron
% Fe₂O₃
Comments

The diagrams

The ACF diagram

The amphiboles in the ACF diagram. To download the chart (Amphibole_ACF.svg) and see more options, hover your mouse over the image. You can zoom in on any area. To zoom back to the original size, double-click the image.

Captions

•	Amphibole 1
•	Amphibole 2
•	Amphibole 3
•	Amphibole 4
•	Amphibole 5

The AFM diagram

The amphiboles shown in the AFM(Ms) diagram (Top: A; Right: M; Left: F). After Nelson, S.A. (2011). To download the chart (Amphibole_AFM(Ms).svg) and see more options, hover your mouse over the image.

Captions

•	Amphibole 1
•	Amphibole 2
•	Amphibole 3
•	Amphibole 4
•	Amphibole 5
Between the red lines	Biotite
Between the green lines	Chlorite
The AFM(Ms) diagram The AFM(Ms) diagram. From Nelson, S.A. (2011).

The Leake diagram

The amphiboles shown in the Leake diagram (after Leake, B.E., 1978). To download the chart (Amphibole_Leake.svg) and see more options, hover your mouse over the image.

Captions

•	Amphibole 1
•	Amphibole 2
•	Amphibole 3
•	Amphibole 4
•	Amphibole 5
The fields in the Leake diagram The fields in the Leake-Diagram (see below).

1	Tremolite
2	Tremolitic Hornblende
3	Magnesio-Hornblende
4	Tschermakitic Hornblende
5	Tschermakite (Alumino-Tschermakite)
6	Actinolite
7	Actinolitic Hornblende
8	Ferro-Actinolite
9	Ferro-Actinolitic Hornblende
10	Ferro-Hornblende
11	Ferro-Tschermakitic Hornblende
12	Ferro-Tschermakite

Download data

Current date

Enter a title

Sample number, etc.

Download data file (*.csv)

Literature

Deer, W.A., Howie, R.A. & Zussman, J. (1992): An introduction to the rock-forming minerals. – Longman Scientific & Technical, Harlow, 2nd edition 1992: 696 p.
Ehlers, E.G. and Blatt, H. (1982): Petrology: Igneous, Sedimentary and Metamorphic. W. H. Freeman, New York, 732 p.
Holland T.J.B. & Richardson S.W. (1979): Amphibole zonation in metabasites as a guide to the evolution of metamorphic conditions. - Contrib. Mineral. Petrol., 70: 143-148.
Leake B.E. (1978): Nomenclature of amphiboles. - Am. Mineral., 63: 1023-1053.
Matthes S. (1987): Mineralogie – Eine Einführung in die spezielle Mineralogie, Petrologie und Lagerstättenkunde. – Springer-Verlag, Berlin, Heidelberg, 1987: 444 p.
Nelson, S.A. (2011): Triangular Plots in Metamorphic Petrology – EENS 2120; Tulane University: PDF EENS 2120.
Robinson P., Spear F.S., Schumacher J.C., Laird J., Klein C., Evans B.W. & Doolan B.L. (1982): Phase relations of metamorphic amphiboles: natural ocurrenceand theory. In: Veblen D.R. & Ribbe P.H. (Eds.): Amphiboles: Petrology and experimental phase relations. - Reviews in mineralogy, 9b, Min. Soc. of America.
Schäfer, J. (1996): Mikrosondenuntersuchungen an Geröllen und detritischen Mineralen im Flysch des Saxothuringikums: Ein Beitrag zur Exhumierungsgeschichte des Liefergebietes. – Inaugural dissertation to obtain a doctorate in natural sciences from the Justus Liebig University in Giessen (Department of Geosciences and Geography), Giessen, March 1996; 176 p.; German with English and French summaries.

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AmphiCalc-1: Amp13RM (Ca hornblendes)

Amp13RM – Amphibole compositions based on 13 cations without Na, K, Mn and Ca

Amp13RM

Data input

Your amphiboles

Calculation

Step 1: Fe³⁺-Determination

Step 2: Calculation

Results Amphibole (23 oxygens)

Download data

Download data file (*.csv)

Literature

Results
Amphibole (23 oxygens)