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Chlorophoenicite

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Formula:
(Mn,Mg)
 
3
Zn
 
2
(AsO
 
4
)(OH,O)
 
6
System:MonoclinicColour:Usually colorless to ...
Hardness:3 - 3½
Name:Named in 1924 by William Frederick Foshag and Robert Burns Gage from the Greek χλωρός for "green" and φοιυικος for "purple-red" in allusion to its color change from natural to artificial light.
Isostructural with:Magnesiochlorophoenicite


Manganese analogue of Magnesium-Chlorophoenicite. Although the original chlorophoenicite was named because of an alexendrite-like effect, the color change under various light sources was observed on rarely encounted prismatic crystals. The vast majority of chlorophoenicite specimens are white to colorless as well as in tiny acicular crystals and do not show color variation from daylight to incandescent light sources.

Classification of Chlorophoenicite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:7/B.17-20
Nickel-Strunz 10th (pending) edition ID:8.BE.35

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
E : With only medium-sized cations, (OH, etc.):RO4 > 2:1
Dana 8th edition ID:41.1.1.1

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
1 : (AB)m(XO4)pZq, where m:p > 4:1
Hey's CIM Ref.:20.3.17

20 : Arsenates (also arsenates with phosphate, but without other anions)
3 : Arsenates of Zn, Cd or Hg
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Type Occurrence of Chlorophoenicite

Type Locality:Buckwheat pit (Southwest opening; Buckwheat Mine), Franklin Mine, Franklin, Franklin Mining District, Sussex Co., New Jersey, USA
General Appearance of Type Material:Usually in acicular, white crystals. Sometimes in somewhat rod-like crystals with an acute rhombic cross-section and definite pyramidal terminations. Rarely may be pale grayish green when crystals are rod-like.
Year of Discovery:1924
Geological Setting of type material:Secondary veinlets in massive ore in a metamorphosed Pre-cambrian sedimentary Zn-Fe-Mn deposit.
Associated Minerals at type locality:
ZinciteWillemiteTephroitePyrochroiteLeucophoenicite
GageiteFrankliniteCalcite

Physical Properties of Chlorophoenicite

Lustre:Sub-Vitreous, Silky
Diaphaneity (Transparency):Transparent
Comment:Pearly on the cleavage surfaces, but usually difficult to observe.
Colour:Usually colorless to white, also light gray-green (natural light); pink to light purplish red (strong artificial light)
Comment:White material common at the Sterling Mine and Franklin.
Streak:colorless
Hardness (Mohs):3 - 3½
Tenacity:Brittle
Cleavage:Distinct/Good
On {100}, good.
Fracture:Splintery
Density (measured):3.46 g/cm3

Crystallography of Chlorophoenicite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/m {B1 1 2/m} {C2/m} {C1 2/m 1}
Cell Parameters:a = 22.97Å, b = 3.28Å, c = 7.31Å
β = 106.18°
Ratio:a:b:c = 7.003 : 1 : 2.229
Unit Cell Volume:V 528.93 ų (Calculated from Unit Cell)
Z:2
Morphology:Usually acicular. Crystals may be long prismatic [010] and deeply striated [010], with etched and dull terminal faces. Face {100} is relatively smooth while {h0l} faces are uneven or warped.
X-Ray Powder Diffraction:
d-spacingIntensity
6.87 (50)
3.71 (70)
3.11 (50)
2.99 (40)
2.64 (100)
2.43 (10)
1.822 (20)
1.758 (30)
Comments:25-1159

Optical Data of Chlorophoenicite

Type:Biaxial (-)
RI values: nα = 1.682 nβ = 1.690 nγ = 1.697
2V:Measured: 81° to 85°, Calculated: 84°
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:High
Dispersion:r > v, relatively strong

Chemical Properties of Chlorophoenicite

Formula:
(Mn,Mg)
 
3
Zn
 
2
(AsO
 
4
)(OH,O)
 
6
Simplified for copy/paste:(Mn,Mg)3Zn2(AsO4)(OH,O)6
Essential elements:As, H, Mn, O, Zn
All elements listed in formula:As, H, Mg, Mn, O, Zn

Relationship of Chlorophoenicite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.BE.05Augelite
Al
 
2
(PO
 
4
)(OH)
 
3
8.BE.10Grattarolaite
Fe
3+
3
(PO
 
4
)O
 
3
8.BE.15Cornetite
Cu
 
3
(PO
 
4
)(OH)
 
3
8.BE.20Clinoclase
Cu
 
3
(AsO
 
4
)(OH)
 
3
8.BE.25Arhbarite
Cu
 
2
Mg(AsO
 
4
)(OH)
 
3
8.BE.25Gilmarite
Cu
 
3
(AsO
 
4
)(OH)
 
3
8.BE.30Allactite
Mn
2+
7
(AsO
 
4
)
 
2
(OH)
 
8
8.BE.30Flinkite
Mn
2+
2
Mn
3+
 
(AsO
 
4
)(OH)
 
4
8.BE.30Raadeite
Mg
 
7
(PO
 
4
)
 
2
(OH)
 
8
8.BE.30Argandite
Mn
 
7
(VO
 
4
)
 
2
(OH)
 
8
8.BE.35Magnesiochlorophoenicite
(Mg,Mn)
 
3
Zn
 
2
(AsO
 
4
)(OH,O)
 
6
8.BE.40Gerdtremmelite
(Zn,Fe)(Al,Fe)
 
2
(AsO
 
4
)(OH)
 
5
8.BE.45Dixenite
CuMn
2+
14
Fe
2+
 
(SiO
 
4
)
 
2
(As
5+
 
O
 
4
)(As
3+
 
O
 
3
)
 
5
(OH)
 
6
8.BE.45Hematolite
(Mn,Mg,Al,Fe
3+
 
)
 
15
(As
5+
 
O
 
4
)
 
2
(As
3+
 
O
 
3
)(OH)
 
23
8.BE.45Kraisslite
Zn
 
3
(Mn,Mg)
 
25
(Fe
3+
 
,Al)(As
3+
 
O
 
3
)
 
2
[(Si,As
5+
 
)O
 
4
]
 
10
(OH)
 
16
8.BE.45Mcgovernite
Mn
 
19
Zn
 
3
(AsO
 
4
)
 
3
(AsO
 
3
)(SiO
 
4
)
 
3
(OH)
 
21
8.BE.45Arakiite
(Zn,Mn
2+
 
)(Mn
2+
 
,Mg)
 
12
(Fe
3+
 
,Al)
 
2
(As
5+
 
O
 
4
)
 
2
(As
3+
 
O
 
3
)(OH)
 
23
8.BE.45Turtmannite
(Mn,Mg)
 
22.5
Mg
 
3-3x
((V
5+
 
,As
5+
 
)O
 
4
)
 
3
(As
3+
 
O
 
3
)
 
x
(SiO
 
4
)
 
3
O
 
5-5x
(OH)
 
20+x
8.BE.45Carlfrancisite
Mn
2+
3
(Mn
2+
 
,Mg,Fe
3+
 
,Al)
 
42
[As
3+
 
O
 
3
]
 
2
(As
5+
 
O
 
4
)
 
4
[(Si,As
5+
 
)O
 
4
]
 
6
[(As
5+
 
,Si)O
 
4
]
 
2
(OH)
 
42
8.BE.50Synadelphite
Mn
2+
9
(As
5+
 
O
 
4
)
 
2
(As
3+
 
O
 
3
)(OH)
 
9
· 2H
 
2
O
8.BE.55Holdenite
(Mn
2+
 
,Mg)
 
6
Zn
 
3
(AsO
 
4
)
 
2
(SiO
 
4
)(OH)
 
8
8.BE.60Kolicite
Mn
2+
7
Zn
 
4
(AsO
 
4
)
 
2
(SiO
 
4
)
 
2
(OH)
 
8
8.BE.65Sabelliite
(Cu,Zn)
 
2
Zn(AsO
 
4
,SbO
 
4
)(OH)
 
3
8.BE.70Jarosewichite
Mn
2+
3
Mn
3+
 
(AsO
 
4
)(OH)
 
6
8.BE.75Theisite
Cu
 
5
Zn
 
5
(AsO
 
4
,SbO
 
4
)
 
2
(OH)
 
14
8.BE.80Coparsite
Cu
 
4
(AsO
 
4
,VO
 
4
)O
 
2
Cl
8.BE.85Waterhouseite
Mn
2+
7
(PO
 
4
)
 
2
(OH)
 
8
Related Minerals - Hey's Index Grouping:

- +
20.3.1Adamite
Zn
 
2
(AsO
 
4
)(OH)
20.3.2Paradamite
Zn
 
2
(AsO
 
4
)(OH)
20.3.3Koritnigite
Zn(HAsO
 
4
) · H
 
2
O
20.3.4Legrandite
Zn
 
2
(AsO
 
4
)(OH) · H
 
2
O
20.3.5Warikahnite
Zn
 
3
(AsO
 
4
)
 
2
· 2H
 
2
O
20.3.6Köttigite
Zn
 
3
(AsO
 
4
)
 
2
· 8H
 
2
O
20.3.7Stranskiite
Zn
 
2
Cu(AsO
 
4
)
 
2
20.3.8Philipsburgite
(Cu,Zn)
 
6
(AsO
 
4
,PO
 
4
)
 
2
(OH)
 
6
· H
 
2
O
20.3.9Austinite
CaZn(AsO
 
4
)(OH)
20.3.10Prosperite
CaZn
 
2
(AsO
 
4
)(HAsO
 
4
)(OH)
20.3.11Gaitite
Ca
 
2
Zn(AsO
 
4
)
 
2
· 2H
 
2
O
20.3.12Zincroselite
Ca
 
2
Zn(AsO
 
4
)
 
2
· 2H
 
2
O
20.3.13O'Danielite
Na(Zn,Mg)
 
3
H
 
2
(AsO
 
4
)
 
3
20.3.14Johillerite
Na(Mg,Zn)
 
3
Cu(AsO
 
4
)
 
3
20.3.15Holdenite
(Mn
2+
 
,Mg)
 
6
Zn
 
3
(AsO
 
4
)
 
2
(SiO
 
4
)(OH)
 
8
20.3.16Chudobaite
(Mg,Zn)
 
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
· 10H
 
2
O
20.3.18Lotharmeyerite
Ca(Zn,Mn
3+
 
)
 
2
(AsO
 
4
)
 
2
· 2(H
 
2
O,OH)
20.3.19Metaköttigite
(Zn,Fe,Fe)
 
3
(AsO
 
4
)
 
2
· 8(H
 
2
O,OH)
20.3.20Ojuelaite
ZnFe
3+
2
(AsO
 
4
)
 
2
(OH)
 
2
· 4H
 
2
O
20.3.21Fahleite
Zn
 
5
CaFe
 
2
(AsO
 
4
)
 
6
· 14H
 
2
O
20.3.22Keyite
Cu
2+
3
Zn
 
4
Cd
 
2
(AsO
 
4
)
 
6
· 2H
 
2
O

Other Names for Chlorophoenicite

Other Languages:
German:Chlorophönizit
Chlorophoenicit
Russian:Хлорофеницит
Spanish:Chlorophoenicita

Other Information

Fluorescence in UV light:Not fluorescent.
Other Information:Soluble in acids.
Special Storage/
Display Requirements from:
Sterling Mine,..., Sussex Co., New Jersey, USAProtect due to fragility.
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 Chlorophoenicite

Reference List:

- +
Foshag and Gage (1924) Journal of the Washington Academy of Science: 14: 362.

Foshag, Berman, and Gage (1927) Proceedings of the U.S. National Museum: 70: Article 20.

Palache, C. (1935) USGS Professional Paper 180: 122.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 778-780.

Dunn, Pete J. (1981): Magnesium-chlorophoenicite redefined and new data on chlorophoenicite. Canadian Mineralogist 19, 333-336.

Internet Links for Chlorophoenicite

Search Engines:
  • Look for Chlorophoenicite on Google
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  • External Links:
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  • Look for Chlorophoenicite on Athena Mineralogy
  • Look for Chlorophoenicite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Chlorophoenicite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
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  • Search for Chlorophoenicite on Well-Arranged Molecules
  • The Arkenstone - Fine Minerals
  • Localities for Chlorophoenicite

    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.
    Greece
     
    • Attikí Prefecture (Attica; Attika)
      • Lavrion District (Laurion; Laurium)
    Schnorrer-Köhler, G., Rewitzer, C., Standfuss, L. & Standfuss, K. (1988): Weitere Neufunde aus Lavrions antiken Schlacken. Lapis 13 (2), 11-14.
    USA
     
    • New Jersey
      • Sussex Co.
        • Franklin Mining District
          • Franklin
            • Franklin Mine
    Pat Gross
    Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 780; Albanese, J.S. (1967) Chlorophoenicite: Rocks & Minerals: 42: 888-889; Dunn, P.J. (1995): Part5: 665.
          • Ogdensburg
            • Sterling Hill
    Palache, C. (1935) USGS Professional Paper 180:123; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 780; Dunn, P.J. (1995): Part 5: 665-666.
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