Palermoite (original) (raw)

A valid IMA mineral species - grandfathered

About PalermoiteHide

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Formula:

Li2SrAl4(PO4)4(OH)4

Li may be replaced by minor Na, and Sr by minor Ca.

Colour:

Colorless, white, pale pink

Lustre:

Sub-Adamantine, Vitreous

Crystal System:

Orthorhombic

Name:

For its occurrence at the Palermo #1 Mine, North Groton, New Hampshire, USA.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:3066:9

IMA Classification of PalermoiteHide

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Approved, 'Grandfathered' (first described prior to 1959)

Type description reference:

Classification of PalermoiteHide

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8.BH.25

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
H : With medium-sized and large cations, (OH,etc.):RO4 = 1:1

41.7.1.1

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
7 : (AB)7(XO4)4Zq

19.5.5

19 : Phosphates
5 : Phosphates of Sr and Ba

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Physical Properties of PalermoiteHide

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Colour:

Colorless, white, pale pink

Cleavage:

Perfect
{001}, perfect; on {100}, fair

Fracture:

Sub-Conchoidal, Fibrous

Density:

3.22 g/cm3 (Measured) 3.26 g/cm3 (Calculated)

Optical Data of PalermoiteHide

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RI values:

_n_α = 1.627 _n_β = 1.642 _n_γ = 1.644

2V:

Measured: 20° , Calculated: 38°

δ = 0.017

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

Dispersion:

r > v or r < v

Chemistry of PalermoiteHide

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Mindat Formula:

Li2SrAl4(PO4)4(OH)4

Li may be replaced by minor Na, and Sr by minor Ca.

Crystallography of PalermoiteHide

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Crystal System:

Orthorhombic

Class (H-M):

m m m _(_2/_m_2/_m_2/m ) - Dipyramidal

Cell Parameters:

a = 11.556(5) Å, b = 15.847(7) Å, c = 7.315(4) Å

Ratio:

a:b:c = 0.729 : 1 : 0.462

Unit Cell V:

1,339.58 ų (Calculated from Unit Cell)

Comment:

Space Group: Imcb

Crystal StructureHide

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ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0000463	Palermoite	Moore P B, Araki T (1975) Palermoite, SrLi2[Al4(OH)4(PO4)4]: Its atomic arrangement and relationship to carminite, Pb2[Fe4(OH)4(AsO4)4] American Mineralogist 60 460-465		1975	Palermo pegmatite, near North Groton, New Hampshire, USA	0	293

CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Type Occurrence of PalermoiteHide

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Place of Conservation of Type Material:

Harvard University, Cambridge, Massachusetts, USA, 101342.

Geological Setting of Type Material:

Other Language Names for PalermoiteHide

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Relationship of Palermoite to other SpeciesHide

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Other Members of Palermoite Group:

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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Notes:

Fluoresces white in direct X-ray beam.

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 PalermoiteHide

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References for PalermoiteHide

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Reference List:

Schumer, Benjamin N., Yang, Hexiong, Downs, Robert T. (2017) Natropalermoite, Na2SrAl4(PO4)4(OH)4, a new mineral isostructural with palermoite, from the Palermo No. 1 mine, Groton, New Hampshire, USA. Mineralogical Magazine, 81 (4) 833-840 doi:10.1180/minmag.2016.080.133

Localities for PalermoiteHide

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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.