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Reviewing empirical formulas

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ebesfus:
Hello everyone, and especially to the publishing team
I am calculating for each mineral its rarity index, iR. This value is described in [1] and requires knowledge of the empirical formula (EF) of each mineral. Mineralienatlas is perfect for this. Therefore, I am checking every EF to get the iR.
The issue is that I found a small error with the data from the bicapite (IMA2018-048), [KNa2Mg2 (H2O) 25] [H2PV12O40 (VO) 2]. The number of oxygen atoms is 67 and V is 14, but 66 and 13 are on your list. Consequently, other data should also be reviewed.
Please, check it and, if you agree, update that data from bicapite.
I am reviewing all minerals (EF) and if I find any other errors, I will contact you again.
Thank you and stay healthy.
[1] BES, Eduard (2021): “Método cuantitativo para determinar la rareza de los minerales basado en la abundancia de sus elementos constituyentes”. Paragénesis; vol. 3, núm. 1 (2021−1), pp. 87−102. (Quantitative method to determine the rarity of minerals based on the abundance of their constituent elements) - https://www.minercat.com/es/publicaciones/paragenesis/en-linea/2021-1

Doc Diether:
I just looked at the Bicapite formula here in MA and I found it 67  0 and V is 14.
Best regards
Doc Diether

guefz:
There was a small mistake in writing the formula, one number that should have been typesetted low, wasn't. Now fixed.

Stefan:
Hello Eduard,

a rarity index sounds interesting. Is there a formula for it? We would be interested in it and could possibly output calculations automatically. If we can help each other let me know.

We have changed the mineral data accordingly:

Anthony R. Kampf; John M. Hughes; Barbara P. Nash; Joe Marty - Bicapite, KNa2Mg2(H2PV145+O42)·25H2O, a new polyoxometalate mineral with a bicapped Keggin anion from the Pickett Corral mine, Montrose County, Colorado, U.S.A. - American Mineralogist (2019) 104 (12): 1851–1856. https://doi.org/10.2138/am-2019-7027

Every hint is welcome
Thx
Stefan

ebesfus:
Yes, actually I am working on it.
In the paper [1] I develop the methodology to calculate iR for each mineral. It requires both manual and automatic calculation. I am trying to implement it so that it can be as automatic as possible.
Now I am calculating iR for all the minerals. As an exemple, I attach a piece of excel sheet I use to calculate it.
 
[1] BES, Eduard (2021): “Método cuantitativo para determinar la rareza de los minerales basado en la abundancia de sus elementos constituyentes”. Paragénesis; vol. 3, núm. 1 (2021−1), pp. 87−102. (Quantitative method to determine the rarity of minerals based on the abundance of their constituent elements) - https://www.minercat.com/es/publicaciones/paragenesis/en-linea/2021-1

>>Sorry, but the article is in Spanish and in Catalan. Maybe I will try to translate it into English.

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