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Sterlinghillite

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Formula:
Mn
 
3
(AsO
 
4
)
 
2
· 4H
 
2
O
System:TriclinicColour:White, pale pinkish ...
Hardness:3
Name:Named in 1981 by Pete J. Dunn after its discovery locality, the Sterling Mine, Sterling Hill, Ogdensburg, New Jersey, USA.
Isostructural with:Ludlamite, Metaswitzerite, Switzerite


Ludlamite Group

Occurs as tiny light white to pale pinkish white spherules on fracture surfaces, also irregular acicular crystals. Few verified specimens known from the type locality.

Classification of Sterlinghillite

IMA status:Approved 1980
Explanation of status:Matsubara et al. (2000) suggest that formula contains only 3 H2O.
Strunz 8th edition ID:7/C.05-30
Nickel-Strunz 10th (pending) edition ID:8.CD.25

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
D : With only medium-sized cations, RO4:H2O = 1:2
Dana 8th edition ID:40.3.5.3

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
3 : A3(XO4)2·xH2O
Hey's CIM Ref.:20.8.9

20 : Arsenates (also arsenates with phosphate, but without other anions)
8 : Arsenates of Mn
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Type Occurrence of Sterlinghillite

Type Locality:Sterling Mine, Sterling Hill, Ogdensburg, Franklin Mining District, Sussex Co., New Jersey, USA
General Appearance of Type Material:Tiny pinkish white spherules or white acicular crystals.
Year of Discovery:1980
Geological Setting of type material:As a secondary mineral on fracture surfaces traversing franklinite-calcite ore in a Precambrian Zn-Mn-Fe orebody.
Associated Minerals at type locality:
WillemiteFrankliniteCalcite

Physical Properties of Sterlinghillite

Lustre:Waxy, Greasy, Silky
Diaphaneity (Transparency):Transparent, Translucent
Colour:White, pale pinkish white, also very pale pink.
Comment:Usually white
Streak:White
Hardness (Mohs):3
Tenacity:Brittle
Fracture:Splintery
Density (measured):2.94 g/cm3
Density (calculated):3.48 g/cm3

Crystallography of Sterlinghillite

Crystal System:Triclinic
Class (H-M):1 - Pinacoidal
Space Group:P1
Space Group Setting:P1
Cell Parameters:a = 10.398Å, b = 10.672Å, c = 7223Å
α = 90.10°, β = 109.10°, γ = 71.83°
Ratio:a:b:c = 0.974 : 1 : 676.818
Unit Cell Volume:V 715,122.45 ų (Calculated from Unit Cell)
Z:2
Morphology:Acicular crystals or mound-like botryoids showing a non-radial fibrous texture
X-Ray Powder Diffraction:
d-spacingIntensity
11.12 (100)
6.39 (30)
3.692 (30)
3.209 (100)
2.880 (40)
2.848 (40)
2.751 (60)

Optical Data of Sterlinghillite

Type:Uniaxial (-)
RI values: nα = 1.656 nγ = 1.671
Birefringence:0.015
Maximum Birefringence:δ = 0.015

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Pleochroism:Non-pleochroic

Chemical Properties of Sterlinghillite

Formula:
Mn
 
3
(AsO
 
4
)
 
2
· 4H
 
2
O
Simplified for copy/paste:Mn3(AsO4)2·4H2O
Essential elements:As, H, Mn, O
All elements listed in formula:As, H, Mn, O

Relationship of Sterlinghillite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.CD.05Kolbeckite
ScPO
 
4
· 2H
 
2
O
8.CD.05Metavariscite
AlPO
 
4
· 2H
 
2
O
8.CD.05Phosphosiderite
FePO
 
4
· 2H
 
2
O
8.CD.05UM2005-02-AsO:AlHPScSi
ScAsO
 
4
· 2H
 
2
O
8.CD.10Mansfieldite
AlAsO
 
4
· 2H
 
2
O
8.CD.10Scorodite
FeAsO
 
4
· 2H
 
2
O
8.CD.10Strengite
FePO
 
4
· 2H
 
2
O
8.CD.10Variscite
AlPO
 
4
· 2H
 
2
O
8.CD.10Yanomamite
InAsO
 
4
· 2H
 
2
O
8.CD.15Parascorodite
FeAsO
 
4
· 2H
 
2
O
8.CD.20Ludlamite
(Fe,Mn,Mg)
 
3
(PO
 
4
)
 
2
· 4H
 
2
O
8.CD.30Rollandite
Cu
 
3
(AsO
 
4
)
 
2
· 4H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
20.8.1Sarkinite
Mn
2+
2
(AsO
 
4
)(OH)
20.8.2Eveite
Mn
2+
2
(AsO
 
4
)(OH)
20.8.3Arsenoclasite
Mn
2+
5
(AsO
 
4
)
 
2
(OH)
 
4
20.8.4Flinkite
Mn
2+
2
Mn
3+
 
(AsO
 
4
)(OH)
 
4
20.8.5Jarosewichite
Mn
2+
3
Mn
3+
 
(AsO
 
4
)(OH)
 
6
20.8.6Allactite
Mn
2+
7
(AsO
 
4
)
 
2
(OH)
 
8
20.8.7Krautite
Mn(HAsO
 
4
) · H
 
2
O
20.8.8Synadelphite
Mn
2+
9
(As
5+
 
O
 
4
)
 
2
(As
3+
 
O
 
3
)(OH)
 
9
· 2H
 
2
O
20.8.10Geigerite
Mn
2+
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
· 10H
 
2
O
20.8.11Akrochordite
(Mn
2+
 
,Mg)
 
5
(AsO
 
4
)
 
2
(OH)
 
4
· 4H
 
2
O
20.8.12Manganohörnesite
(Mn,Mg)
 
3
(AsO
 
4
)
 
2
· 8H
 
2
O
20.8.13Fluckite
CaMn
2+
 
(HAsO
 
4
)
 
2
· 2H
 
2
O
20.8.14Brandtite
Ca
 
2
(Mn
2+
 
,Mg)(AsO
 
4
)
 
2
· 2H
 
2
O
20.8.15Parabrandtite
Ca
 
2
Mn
2+
 
(AsO
 
4
)
 
2
· 2H
 
2
O
20.8.16Wallkilldellite-(Mn)
Ca
 
2
Mn
2+
3
(AsO
 
4
)
 
2
(OH)
 
4
· 9H
 
2
O
20.8.17Berzeliite
NaCa
 
2
(Mg,Mn
2+
 
)
 
2
(AsO
 
4
)
 
3
20.8.18Manganberzeliite
(Ca,Na)
 
3
(Mn
2+
 
,Mg)
 
2
(AsO
 
4
)
 
3
20.8.19Magnesiochlorophoenicite
(Mg,Mn)
 
3
Zn
 
2
(AsO
 
4
)(OH,O)
 
6
20.8.20Villyaellenite
MnMn
 
2
Ca
 
2
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
· 4H
 
2
O
20.8.21Hematolite
(Mn,Mg,Al,Fe
3+
 
)
 
15
(As
5+
 
O
 
4
)
 
2
(As
3+
 
O
 
3
)(OH)
 
23
20.8.22Grischunite
NaCa
 
2
Mn
2+
5
Fe
3+
 
(AsO
 
4
)
 
6
· 2H
 
2
O

Other Names for Sterlinghillite

Synonyms:
IMA1980-007
Other Languages:
German:Sterlinghillit
Japanese:スターリングヒル石
Spanish:Sterlinghillita

Other Information

Fluorescence in UV light:Not fluorescent
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Sterlinghillite

Reference List:

- +
Dunn, P. J. (1981): Sterlinghillite, a new hydrated manganese arsenate mineral from Ogdensburg, New Jersey: American Mineralogist: 66, 182-184.

Dunn, P.J. (1995): Franklin and Sterling Hill New Jersey: The World's Most Magnificent Mineral Deposits: Part 5: 682-683.

Matsubara, S., R. Miyawaki, T. Mouri, M. Kitamine (2000): Sterlinghillite, a rare manganese arsenate, from the Gozaisho mine, Fukushima Prefecture, Japan. Bulletin of the National Science Museum, Tokyo, Series C, 26(1-2), 1-7.

Internet Links for Sterlinghillite

Search Engines:
  • Look for Sterlinghillite on Google
  • Look for Sterlinghillite images on Google
  • External Links:
  • Look for Sterlinghillite on Webmineral
  • Look for Sterlinghillite on Athena Mineralogy
  • Look for Sterlinghillite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Sterlinghillite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
  • Fabre Minerals - search for Sterlinghillite specimens
  • Sterlinghillite specimens for sale - minfind.com
  • Wilensky Fine Minerals
  • The Arkenstone - Fine Minerals
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  • rare and unusual minerals mainly crystallized
  • SpiriferMinerals.com - high quality low prices
  • Rare and Unusual minerals at Mineralogical Research Company
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  • Localities for Sterlinghillite

    The 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.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Japan
     
    • Honshu Island
      • Tohoku Region
        • Fukushima Prefecture
          • Iwaki
    Ryuji Marumoto collection; Matsubara, S., Miyawaki, R., Kato, A., Matsuyama, F., Mouri, T. and Suzuki, Y. (2001): Arseniopleite from the Gozaisho mine, Fukushima Prefecture, Japan. Bulletin of the National Science Museum, Tokyo, Ser. C, 27, 51-62.
    USA
     
    • New Jersey
      • Sussex Co.
        • Franklin Mining District
          • Ogdensburg
            • Sterling Hill
    Dunn, P.J. (1981), Am. Min.: 66: 182-184; Dunn, P.J. (1995): Pt5: 682-683.
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    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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