The Beraunite problem

a 2021

The Beraunite problem

TVRDÝ, Jaromír, Luboš VRTIŠKA, Jakub PLÁŠIL, Jiří SEJKORA, Radek ŠKODA et. al.

Základní údaje

Originální název

The Beraunite problem

Autoři

TVRDÝ, Jaromír (203 Česká republika, garant, domácí), Luboš VRTIŠKA (203 Česká republika, domácí), Jakub PLÁŠIL (203 Česká republika), Jiří SEJKORA (203 Česká republika), Radek ŠKODA (203 Česká republika, domácí), Andreas MASSANEK (276 Německo), Jan FILIP (203 Česká republika), Zdeněk DOLNÍČEK (203 Česká republika) a František VESELOVSKÝ (203 Česká republika)

Vydání

Acta Mineralogica-Petrographica, Abstract Series, 2021

Další údaje

Jazyk

angličtina

Typ výsledku

Konferenční abstrakt

Obor

10504 Mineralogy

Stát vydavatele

Maďarsko

Utajení

není předmětem státního či obchodního tajemství

Kód RIV

RIV/00216224:14310/21:00121590

Organizační jednotka

Přírodovědecká fakulta

ISSN

Klíčová slova česky

mineralogie; historie; beraunit; eleonorit; nomenklatura

Klíčová slova anglicky

mineralogy; history; beraunite; eleonorite; mineral names

Příznaky

Mezinárodní význam

Změněno: 16. 5. 2021 09:46, RNDr. Jaromír Tvrdý, Ph.D.

Anotace

V originále

Basic iron phosphates of transition metals belong to the most perplexing mineral phases (MOORE, 1969, 1970). Although they are known for a long time and have a relatively simple chemical composition, their detailed study brings a number of surprises. A typical example is beraunite, known for science for almost two centuries. This mineral was first described by BREITHAUPT (1840, 1841) on a sample from the Hrbek mine near Svatá Dobrotivá in Central Bohemia, where it occurs in dark red, semi-transparent tabular to prismatic crystals. Chemical analysis performed at that time showed that it is a hydrated basic iron phosphate, in which trivalent iron is present exclusively. Structural analysis based on X-ray diffraction has been applied in mineralogy from the first half of the 20th century. During the systematic study of phosphates it was found that some green acicular phases considered to be dufrénite have the pattern identical with beraunite (FRONDEL, 1949). The “green” and “red” beraunites were considered to be varieties of the same mineral species. Subsequent solution of the role of ferrous iron in the structure and its effect on colour was followed by nomenclatural proposals (MOORE & KAMPF, 1992). Current valid names for these minerals are eleonorite for the “red” trivalent iron phase, and beraunite for the “green” mixed-valence compound (CHUKANOV et al., 2017). As this state does not correspond to the original description of beraunite, new analyses of the original Breithaupt’s specimen stored in the Mining Academy in Freiberg and of analogous historical samples from National Museum Prague were performed. The results show the identity of beraunite with the mineral eleonorite described by CHUKANOV et al. (2017). The currently confused nomenclature of iron dominant members of the beraunite series is an example of the situation where the description of new minerals is not supported by the thorough study of type samples and an original literature. A possible solution of this “beraunite problem” is discreditation of eleonorite, preservation the original name beraunite for the “red” trivalent phase, and giving a new mineral name to the “green” mixed-valence member of the series.

Návaznosti

MUNI/A/1387/2018, interní kód MU

Název: Geologické a geoenvironmentální procesy východního okraje Českého masívu a jejich vývoj. (Akronym: GEOPROC)

Investor: Masarykova univerzita, Geologické a geoenvironmentální procesy východního okraje Českého masívu a jejich vývoj., DO R. 2020_Kategorie A - Specifický výzkum - Studentské výzkumné projekty

Citovat

TVRDÝ, Jaromír, Luboš VRTIŠKA, Jakub PLÁŠIL, Jiří SEJKORA, Radek ŠKODA, Andreas MASSANEK, Jan FILIP, Zdeněk DOLNÍČEK a František VESELOVSKÝ. The Beraunite problem. In Acta Mineralogica-Petrographica, Abstract Series. 2021. ISSN 1589-4835.

@proceedings{1768776,
   author = {Tvrdý, Jaromír and Vrtiška, Luboš and Plášil, Jakub and Sejkora, Jiří and Škoda, Radek and Massanek, Andreas and Filip, Jan and Dolníček, Zdeněk and Veselovský, František},
   booktitle = {Acta Mineralogica-Petrographica, Abstract Series},
   keywords = {mineralogy; history; beraunite; eleonorite; mineral names},
   language = {eng},
   title = {The Beraunite problem},
   year = {2021}
}

TY  - CONF
ID  - 1768776
AU  - Tvrdý, Jaromír - Vrtiška, Luboš - Plášil, Jakub - Sejkora, Jiří - Škoda, Radek - Massanek, Andreas - Filip, Jan - Dolníček, Zdeněk - Veselovský, František
PY  - 2021
TI  - The Beraunite problem
KW  - mineralogy
KW  - history
KW  - beraunite
KW  - eleonorite
KW  - mineral names
N2  - Basic iron phosphates of transition metals belong to the most perplexing mineral phases (MOORE, 1969, 1970). Although they are known for a long time and have a relatively simple chemical composition, their detailed study brings a number of surprises. A typical example is beraunite, known for science for almost two centuries. This mineral was first described by BREITHAUPT (1840, 1841) on a sample from the Hrbek mine near Svatá Dobrotivá in Central Bohemia, where it occurs in dark red, semi-transparent tabular to prismatic crystals. Chemical analysis performed at that time showed that it is a hydrated basic iron phosphate, in which trivalent iron is present exclusively. Structural analysis based on X-ray diffraction has been applied in mineralogy from the first half of the 20th century. During the systematic study of phosphates it was found that some green acicular phases considered to be dufrénite have the pattern identical with beraunite (FRONDEL, 1949). The “green” and “red” beraunites were considered to be varieties of the same mineral species. Subsequent solution of the role of ferrous iron in the structure and its effect on colour was followed by nomenclatural proposals (MOORE & KAMPF, 1992). Current valid names for these minerals are eleonorite for the “red” trivalent iron phase, and beraunite for the “green” mixed-valence compound (CHUKANOV et al., 2017). As this state does not correspond to the original description of beraunite, new analyses of the original Breithaupt’s specimen stored in the Mining Academy in Freiberg and of analogous historical samples from National Museum Prague were performed. The results show the identity of beraunite with the mineral eleonorite described by CHUKANOV et al. (2017). The currently confused nomenclature of iron dominant members of the beraunite series is an example of the situation where the description of new minerals is not supported by the thorough study of type samples and an original literature. A possible solution of this “beraunite problem” is discreditation of eleonorite, preservation the original name beraunite for the “red” trivalent phase, and giving a new mineral name to the “green” mixed-valence member of the series.
ER  -

TVRDÝ, Jaromír, Luboš VRTIŠKA, Jakub PLÁŠIL, Jiří SEJKORA, Radek ŠKODA, Andreas MASSANEK, Jan FILIP, Zdeněk DOLNÍČEK a František VESELOVSKÝ. The Beraunite problem. In \textit{Acta Mineralogica-Petrographica, Abstract Series}. 2021. ISSN~1589-4835.

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