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Chlorophoenicite

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Formula:
(Mn,Mg)3Zn2(AsO4)(OH,O)6
System:
Monoclinic
Colour:
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:
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

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
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
41.1.1.1

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

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

General Appearance of First Recorded 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 First Recorded Material:
Secondary veinlets in massive ore in a metamorphosed Pre-cambrian sedimentary Zn-Fe-Mn deposit.

Physical Properties of Chlorophoenicite

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:
3.46 g/cm3 (Measured)    

Crystallography of Chlorophoenicite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
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 Data:
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
Max Birefringence:
δ = 0.015
Image 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)3Zn2(AsO4)(OH,O)6
Essential elements:
All elements listed in formula:

Relationship of Chlorophoenicite to other Species

8.BE.05AugeliteAl2(PO4)(OH)3
8.BE.10GrattarolaiteFe33+(PO4)O3
8.BE.15CornetiteCu3(PO4)(OH)3
8.BE.20ClinoclaseCu3(AsO4)(OH)3
8.BE.25ArhbariteCu2Mg(AsO4)(OH)3
8.BE.25GilmariteCu3(AsO4)(OH)3
8.BE.30AllactiteMn72+(AsO4)2(OH)8
8.BE.30FlinkiteMn22+Mn3+(AsO4)(OH)4
8.BE.30RaadeiteMg7(PO4)2(OH)8
8.BE.30ArganditeMn7(VO4)2(OH)8
8.BE.35Magnesiochlorophoenicite(Mg,Mn)3Zn2(AsO4)(OH,O)6
8.BE.40Gerdtremmelite(Zn,Fe)(Al,Fe)2(AsO4)(OH)5
8.BE.45DixeniteCuMn142+Fe2+(SiO4)2(As5+O4)(As3+O3)5(OH)6
8.BE.45Hematolite(Mn,Mg,Al,Fe3+)15(As5+O4)2(As3+O3)(OH)23
8.BE.45KraissliteZn3(Mn,Mg)25(Fe3+,Al)(As3+O3)2[(Si,As5+)O4]10(OH)16
8.BE.45McgoverniteMn19Zn3(AsO4)3(AsO3)(SiO4)3(OH)21
8.BE.45Arakiite(Zn,Mn2+)(Mn2+,Mg)12(Fe3+,Al)2(As5+O4)2(As3+O3)(OH)23
8.BE.45Turtmannite(Mn,Mg)22.5Mg3-3x((V5+,As5+)O4)3(As3+O3)x(SiO4)3O5-5x(OH)20+x
8.BE.45CarlfrancisiteMn32+(Mn2+,Mg,Fe3+,Al)42[As3+O3]2(As5+O4)4[(Si,As5+)O4]6[(As5+,Si)O4]2(OH)42
8.BE.50SynadelphiteMn92+(As5+O4)2(As3+O3)(OH)9 · 2H2O
8.BE.55Holdenite(Mn2+,Mg)6Zn3(AsO4)2(SiO4)(OH)8
8.BE.60KoliciteMn72+Zn4(AsO4)2(SiO4)2(OH)8
8.BE.65Sabelliite(Cu,Zn)2Zn(AsO4,SbO4)(OH)3
8.BE.70JarosewichiteMn32+Mn3+(AsO4)(OH)6
8.BE.75TheisiteCu5Zn5(AsO4,SbO4)2(OH)14
8.BE.80CoparsiteCu4(AsO4,VO4)O2Cl
8.BE.85WaterhouseiteMn72+(PO4)2(OH)8
20.3.1AdamiteZn2(AsO4)(OH)
20.3.2ParadamiteZn2(AsO4)(OH)
20.3.3KoritnigiteZn(HAsO4) · H2O
20.3.4LegranditeZn2(AsO4)(OH) · H2O
20.3.5WarikahniteZn3(AsO4)2 · 2H2O
20.3.6KöttigiteZn3(AsO4)2 · 8H2O
20.3.7StranskiiteZn2Cu(AsO4)2
20.3.8Philipsburgite(Cu,Zn)6(AsO4,PO4)2(OH)6 · H2O
20.3.9AustiniteCaZn(AsO4)(OH)
20.3.10ProsperiteCaZn2(AsO4)(HAsO4)(OH)
20.3.11GaititeCa2Zn(AsO4)2 · 2H2O
20.3.12ZincroseliteCa2Zn(AsO4)2 · 2H2O
20.3.13O'DanieliteNa(Zn,Mg)3H2(AsO4)3
20.3.14JohilleriteNa(Mg,Zn)3Cu(AsO4)3
20.3.15Holdenite(Mn2+,Mg)6Zn3(AsO4)2(SiO4)(OH)8
20.3.16Chudobaite(Mg,Zn)5(AsO4)2(HAsO4)2 · 10H2O
20.3.18LotharmeyeriteCa(Zn,Mn3+)2(AsO4)2 · 2(H2O,OH)
20.3.19Metaköttigite(Zn,Fe,Fe)3(AsO4)2 · 8(H2O,OH)
20.3.20OjuelaiteZnFe23+(AsO4)2(OH)2 · 4H2O
20.3.21FahleiteZn5CaFe2(AsO4)6 · 14H2O
20.3.22KeyiteCu32+Zn4Cd2(AsO4)6 · 2H2O

Other Names for Chlorophoenicite

Name in Other Languages:

Other Information

Other Information:
Soluble in acids.
Health Risks:
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

Localities for Chlorophoenicite

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Mineral and/or Locality  
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