Pyroaurite-2H (original) (raw)

A material that is NOT an approved mineral species

About Pyroaurite-2HHide

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Formula:

Mg6Fe3+2(OH)16(CO3) · 4H2O

Colour:

White, yellowish green, brownish green, yellowish white, brownish white

Lustre:

Vitreous, Waxy, Pearly

Specific Gravity:

2.08 - 2.14

Name:

Named for the structural relationship to pyroaurite. Originally named sjögrenite by Clifford Frondel in 1940 in honor of Stens Anders Hjalmar Sjögren (1856-1922), Professor of Mineralogy, University of Stockholm, Sweden.

A polytype of Pyroaurite

Originally named sjögrenite. Subsequently recognised as a polytype of pyroaurite and accordingly discredited as a species (Mills et al., 2012).

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:3678:4

Classification of Pyroaurite-2HHide

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5.DA.45

5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
A : With medium-sized cations

16b.6.1.3

16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
6 : AmBn(XO3)pZq

xH2O & with (m+n):p = 8:1

11.13.3

11 : Carbonates
13 : Carbonates of Fe

Physical Properties of Pyroaurite-2HHide

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Colour:

White, yellowish green, brownish green, yellowish white, brownish white

Density:

2.08 - 2.14 g/cm3 (Measured) 2.11 g/cm3 (Calculated)

Optical Data of Pyroaurite-2HHide

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RI values:

_n_ω = 1.573 _n_ε = 1.550

δ = 0.023

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Chemistry of Pyroaurite-2HHide

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Mindat Formula:

Mg6Fe3+2(OH)16(CO3) · 4H2O

Crystallography of Pyroaurite-2HHide

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Class (H-M):

6/m m m _(_6/_m_2/_m_2/m ) - Dihexagonal Dipyramidal

Cell Parameters:

a = 3.113(3) Å, c = 15.61(1) Å

Unit Cell V:

131.01 ų (Calculated from Unit Cell)

Morphology:

Thin plates {0001}, with a hexagonal outline and striated and indistinct lateral faces.

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

First Recorded Occurrence of Pyroaurite-2HHide

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Synonyms of Pyroaurite-2HHide

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Other Language Names for Pyroaurite-2HHide

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Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for Pyroaurite-2HHide

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References for Pyroaurite-2HHide

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Reference List:

Mills, S. J., Christy, A. G., Génin, J.-M. R., Kameda, T., Colombo, F. (2012) Nomenclature of the hydrotalcite supergroup: natural layered double hydroxides. Mineralogical Magazine, 76 (5) 1289-1336 doi:10.1180/minmag.2012.076.5.10

Localities for Pyroaurite-2HHide

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This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.

Australia
Tasmania Huon Valley municipality Huon-Channel region Weld river district ⓘ Forster Prospect ?	Bottrill R.S. & Baker (2008)
Waratah-Wynyard municipality Corinna-Savage River district ⓘ Savage River Mines	Bottrill & Taheri +1 other reference
West Coast municipality Trial Harbour district ⓘ Nickel Reward Mine	Bottrill et al. (2008)
Zeehan mining district Mt Heemskirk mineral field ⓘ Tenth Legion mine	Bottrill R.S. & Baker (2008)
Austria
Lower Austria Melk District Persenbeug-Gottsdorf Loja ⓘ Quarry IV- Middle & Northern Area	Löffler et al. (2011)
Canada
Québec Chaudière-Appalaches Les Appalaches RCM Saint-Julien ⓘ Belmina mine	SABINA (1967)
Germany
Bavaria Upper Palatinate Schwandorf District Winklarn ⓘ Huber Quarry	Blaß et al. (1994) +1 other reference
Lower Saxony Goslar District Langelsheim Grane Reservoir ⓘ Ochsenhütte slag locality	Schnorrer-Köhler (1991)
Italy
Sardinia South Sardinia Province Teulada ⓘ Giovanni Matta quarry	Conti L et al. (Sardegna meridionale)
Trentino-Alto Adige (Trentino-South Tyrol) Trento Province (Trentino) Ala Pilcante ⓘ Val di Serra Quarry	Bortolozzi et al. (2013)
Veneto Vicenza Province Cogollo del Cengio ⓘ Menegolli Quarry (Marmi Quarry)	Boscardin M. et al. (2011)
Laghi ⓘ Grama Valley Quarry	Antonio Zordan collection
Posina Borcola Pass ⓘ Borcola Pass Quarry (Lucchi Quarry; Prato Lorda Quarry)	Boscardin M. et al. (2011)
Punta della Lucche ⓘ Nido d'Aquila Quarry	Boscardin M. et al. (2011)
Japan
Aichi Prefecture Shinshiro city ⓘ Nakauri mine
ⓘ Takenowa	Petrov (n.d.)
ⓘ Yoshikawa mine	Yamada (2004)
Kazakhstan
North Kazakhstan Region Aiyrtau District Zlatogorsk Zlatogorsk ultramafic intrusion ⓘ Dunite lens	Pekov (1998)
Lebanon
South Governorate Jezzine District ⓘ Bhanine Valley	Kruszewski (2019)
Poland
Silesian Voivodeship Wodzisław County Wodzisław Śląski ⓘ Pszów ?	Ł. Kruszewski (PXRD data)
Russia
Irkutsk Oblast Nizhneilimsky District Zheleznogorsk-Ilimsky ⓘ Korshunovskoye iron deposit	Mazurov et al. (2007) +1 other reference
Murmansk Oblast Kovdorsky District Kovdor Massif ⓘ Kovdor Phlogopite mine	maurice.strahlen.org (2003)
Sweden (FRL)
Värmland County Filipstad Långban Ore District ⓘ Långban Mine (FRL)	Aminoff (1931) +2 other references
ⓘ Nordmark Odal Field	Gatedal (n.d.)
Persberg ore district ⓘ Gåsgruvan ore field ?	Sandström et al. (2009)
ⓘ Gåsgruvan ?	Linden (2002)
ⓘ Gåsgruvan Quarry	Östra Värmlands Mineral Society
UK
Scotland Shetland Islands Unst ⓘ Setters Quarry ?	Dr Stephen Moreton collection.
USA
California San Francisco County San Francisco ⓘ Fort Point	Murdoch (1966) +2 other references
Sonoma County Healdsburg ⓘ US Highway 101 roadcut	Pemberton (1983) +1 other reference
ⓘ Lytton	www.minresco.com/syst/s.htm
New Jersey Sussex County Ogdensburg Sterling Hill ⓘ Sterling Mine	Leavens et al. (1981) +2 other references