Koksharovite
A valid IMA mineral species
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Nikolai Ivanovich Koksharov
Formula:
CaMg2Fe3+4(VO4)6
Colour:
Yellowish-brown to reddish-brown
Lustre:
Adamantine
Hardness:
4½
Specific Gravity:
3.39 (Calculated)
Crystal System:
Triclinic
Member of:
Name:
Koksharovite is named after Professor Nikolay Ivanovich Koksharov (Николай Иванович Кокшаров) (23 November (5 December), 1818 - 21 December (2 January), 1893), Academician of the Russian Academy of Sciences from 1855 and Director of the Russian Mineralogical Society from 1865. Professor Koksharov made the first systematic, extended study of the mineralogy of Russia. His fundamental work Materials for Mineralogy of Russia was published in eleven volumes from 1853 to 1892 in Russian and German. He is also well-known as an author for excellent goniometric measurements of crystals of many minerals that are still valid.
Unique Identifiers
Mindat ID:
43857
Long-form identifier:
mindat:1:1:43857:3
GUID
(UUID V4):
(UUID V4):
97f842d4-0526-4fcc-bf1c-158c231c8254
IMA Classification of Koksharovite
Approved
First published:
2014
Classification of Koksharovite
8.AC.02
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
C : With medium-sized and large cations
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
C : With medium-sized and large cations
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Kok | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Koksharovite
Adamantine
Transparency:
Translucent
Colour:
Yellowish-brown to reddish-brown
Streak:
Yellowish-brown
Hardness:
4½ on Mohs scale
Hardness:
VHN20=368 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
3.39 g/cm3 (Calculated)
Optical Data of Koksharovite
Anisotropism:
Weak
Bireflectance:
Weak
Reflectivity:
| Wavelength | R1 | R2 |
|---|---|---|
| 400nm | 16.5% | 17.5% |
| 420nm | 15.9% | 16.9% |
| 440nm | 15.1% | 16.2% |
| 460nm | 14.6% | 15.6% |
| 470nm | 14.4% | 15.3% |
| 480nm | 14.2% | 15.1% |
| 500nm | 13.8% | 14.8% |
| 520nm | 13.5% | 14.4% |
| 540nm | 13.3% | 14.1% |
| 546nm | 13.2% | 14.1% |
| 560nm | 13.1% | 14.0% |
| 580nm | 13.0% | 13.8% |
| 589nm | 13.0% | 13.8% |
| 600nm | 12.9% | 13.7% |
| 620nm | 12.8% | 13.5% |
| 640nm | 12.7% | 13.4% |
| 650nm | 12.7% | 13.4% |
| 660nm | 12.6% | 13.3% |
| 680nm | 12.5% | 13.2% |
| 700nm | 12.5% | 13.2% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 17.5%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Light grey
Internal Reflections:
Distinct, yellow-brown to red
Pleochroism:
Non-pleochroic
Chemistry of Koksharovite
Mindat Formula:
CaMg2Fe3+4(VO4)6
Crystallography of Koksharovite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 8.1758(7) Å, b = 9.8292(9) Å, c = 6.6940(6) Å
α = 105.041(8)°, β = 102.040(8)°, γ = 106.025(8)°
α = 105.041(8)°, β = 102.040(8)°, γ = 106.025(8)°
Ratio:
a:b:c = 0.832 : 1 : 0.681
Unit Cell V:
476.02 ų (Calculated from Unit Cell)
Epitaxial Relationships of Koksharovite
Epitaxial Minerals:
| Ziminaite | Fe3+ 6 (VO4)6 |
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.47 Å | (28) |
| 3.75 Å | (44) |
| 3.26 Å | (27) |
| 3.17 Å | (100) |
| 3.09 Å | (94) |
| 2.802 Å | (25) |
| 2.039 Å | (28) |
| 1.664 Å | (25) |
Comments:
From Type Description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 45b : [Other oxidized fumarolic minerals] |
Type Occurrence of Koksharovite
General Appearance of Type Material:
Equant to prismatic crystals, typically skeletal, up to 30 x 70 µm (usually from 5 to 15 µm) in size and their groups on the surface of andesite scoria.
Place of Conservation of Type Material:
Type material is deposited in the collections of the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia, registration number 4329/1.
Geological Setting of Type Material:
Volcanic fumaroles.
Associated Minerals at Type Locality:
Synonyms of Koksharovite
Other Language Names for Koksharovite
Russian:Кoкшapoвит
Relationship of Koksharovite to other Species
Member of:
Other Members of this group:
| Grigorievite | Cu3Fe3+2Al2(VO4)6 | Tric. 1 : P1 |
| Howardevansite | NaCuFe2(VO4)3 | Tric. 1 : P1 |
| Kabalovite | Fe2+3Fe3+4(PO4)6 | Tric. 1 : P1 |
| Ziminaite | Fe3+ 6 (VO4)6 | Tric. 1 : P1 |
Related Minerals - Strunz-mindat Grouping
| 8.AC. | Angarfite | NaFe3+5(PO4)4(OH)4 · 4H2O |
| 8.AC. | Wopmayite | Ca6Na3◻Mn(PO4)3(PO3OH)4 |
| 8.AC.X | Dyrnaesite-(La) | Na8Ce4+(La,REE)2(PO4)6 |
| 8.AC. | Edtollite | K2NaCu5Fe3+O2(AsO4)4 |
| 8.AC. | Alumoedtollite | K2NaCu5AlO2(AsO4)4 |
| 8.AC. | Crocobelonite | CaFe3+2O(PO4)2 |
| 8.AC. | Manganobadalovite | NaNaMn(MgFe3+)(AsO4)3 |
| 8.AC. | Beershevaite | CaFe3+3(PO4)3O |
| 8.AC. | Calciohatertite | NaNaCa(CaFe3+)(AsO4)3 |
| 8.AC. | Kabalovite | Fe2+3Fe3+4(PO4)6 |
| 8.AC. | Nazarchukite | Ca2NiFe3+2(PO4)4 |
| 8.AC. | Changesite–(Y) | (Ca8Y)◻Fe2+(PO4)7 |
| 8.AC. | Crocobelonite-1M | CaFe3+2O(PO4)2 |
| 8.AC. | Ebnerite | (NH4)Zn(PO4) |
| 8.AC. | Magnesioqingheiite | Na2Mg(MgAl)(PO4)3 |
| 8.AC. | Epiebnerite | (NH4)Zn(PO4) |
| 8.AC.02 | Grigorievite | Cu3Fe3+2Al2(VO4)6 |
| 8.AC.02 | Ziminaite | Fe3+ 6 (VO4)6 |
| 8.AC.05 | Calciojohillerite | NaCaMg3(AsO4)3 |
| 8.AC.05 | Howardevansite | NaCuFe2(VO4)3 |
| 8.AC.05 | O'Danielite | Na(Zn,Mg)3(AsO4)(AsO3OH)2 |
| 8.AC.05 va | Alluaudite-Na□ | ◻4Na4Mn2+4Fe3+8(PO4)12 |
| 8.AC.05 va | Alluaudite-Ca□ | ◻4Ca4Mn2+4Fe3+8(PO4)12 |
| 8.AC.05 va | Ferroalluaudite-NaNa | Na4Na4Fe2+4Fe3+8(PO4)12 |
| 8.AC.05 | Hagendorfite-NaNa | NaNaFe2+(Mn2+,Mn3+)(PO4)3 (?) |
| 8.AC.05 | Erikapohlite | Cu3(Zn,Cu,Mg)4Ca2(AsO4)6 · 2H2O |
| 8.AC.05 | Hatertite | Na2(Ca,Na)(Fe3+,Cu)2(AsO4)3 |
| 8.AC.05 | Unnamed (Na-Mg Arsenate Hydroxyarsenate) | NaMg3(AsO4)(AsO3OH)2 |
| 8.AC.05 | Unnamed (Na-Zn-H Arsenate Hydrxyarsenate) | Na(Na0.6Zn0.4)Zn2(H0.6AsO4)(AsO3OH)2 |
| 8.AC.05 | Zincobradaczekite | NaZn2Cu2(AsO4)3 |
| 8.AC.05 | Badalovite | Na2Mg2Fe(AsO4)3 |
| 8.AC.05 | Magnesiocanutite | NaMnMg2[AsO4]2[AsO2(OH)2] |
| 8.AC.05 | Magnesiohatertite | (Na,Ca)2Ca(Mg,Fe3+)2(AsO4)3 |
| 8.AC.05 | Khrenovite | Na3Fe3+2(AsO4)3 |
| 8.AC.05 | Paraberzeliite | NaCa2Mg2(AsO4)3 |
| 8.AC.05 | Camanchacaite | NaCaMg2[AsO4][AsO3(OH)]2 |
| 8.AC.05 | Manganohatertite | NaNaCa(MnFe3+)(AsO4)3 |
| 8.AC.07 | Zhanghuifenite | Na3Mn4Mg2Al(PO4)6 |
| 8.AC.07 | Ferrobobfergusonite | Na2Fe2+5Fe3+Al(PO4)6 |
| 8.AC.10 | Alluaudite | (Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3 |
| 8.AC.10 | Arseniopleite | NaCaMnMn2(AsO4)3 |
| 8.AC.10 | Caryinite | (Na,Pb)(Ca,Na)CaMn2+2(AsO4)3 |
| 8.AC.10 | Ferroalluaudite | (Na,Ca)Fe2+(Fe3+,Mn2+,Fe2+)2(PO4)3 |
| 8.AC.10 | Hagendorfite | NaCaMn2+Fe2+2(PO4)3 |
| 8.AC.10 | Johillerite | Na(Mg,Zn)3Cu(AsO4)3 |
| 8.AC.10 | Maghagendorfite | (Na,◻)MgMn2+(Fe2+,Fe3+)2(PO4)3 |
| 8.AC.10 | Nickenichite | Na0.8Ca0.4Cu0.4(Mg,Fe)3(AsO4)3 |
| 8.AC.10 | Varulite | NaCaMn2+Mn2+2(PO4)3 |
| 8.AC.10 | Ferrohagendorfite | NaCaFe2+Fe2+2(PO4)3 |
| 8.AC.10 | Bradaczekite | NaCu4(AsO4)3 |
| 8.AC.10 | Groatite | NaCaMn2(PO4)[PO3(OH)]2 |
| 8.AC.15 | Bobfergusonite | Na2Mn5FeAl(PO4)6 |
| 8.AC.15 | Ferrowyllieite | (Na,Ca,Mn)(Fe,Mn)(Fe,Fe,Mg)Al(PO4)3 |
| 8.AC.15 | Qingheiite | NaNaMn2+(MgAl)(PO4)3 |
| 8.AC.15 | Rosemaryite | (Na,Ca,Mn)(Mn,Fe2+)(Fe3+,Mg)Al(PO4)3 |
| 8.AC.15 | Wyllieite | (Na,Ca,Mn)(Mn,Fe)(Fe,Mg)Al(PO4)3 |
| 8.AC.15 | Ferrorosemaryite | ◻NaFe2+Fe3+Al(PO4)3 |
| 8.AC.15 | Ferroqingheiite | NaNaFe2+(MgAl)(PO4)3 |
| 8.AC.17 | Czochralskiite | Na4Ca3Mg(PO4)4 |
| 8.AC.18 | Manitobaite | Na16Mn2+ 25Al8(PO4)30 |
| 8.AC.20 | Marićite | NaFe2+(PO4) |
| 8.AC.25 | Berzeliite | (NaCa2)Mg2(AsO4)3 |
| 8.AC.25 | Manganberzeliite | (NaCa2)Mn2+2(AsO4)3 |
| 8.AC.25 | Palenzonaite | (NaCa2)Mn2+2(VO4)3 |
| 8.AC.25 | Schäferite | (NaCa2)Mg2(VO4)3 |
| 8.AC.25 | Hedegaardite | (Ca,Na)9(Ca,Na)Mg(PO4)6(PO3OH) |
| 8.AC.25 | Matyhite | Ca18(Ca,◻)2Fe2+2(PO4)14 |
| 8.AC.30 | Brianite | Na2CaMg(PO4)2 |
| 8.AC.35 | Vitusite-(Ce) | Na3(Ce,La,Nd)(PO4)2 |
| 8.AC.40 | Olgite | (Sr,Ba)(Na,Sr,REE)2Na(PO4)2 |
| 8.AC.40 | Bario-olgite | (Ba,Sr)(Na,Sr,REE)2Na(PO4)2 · |
| 8.AC.45 | Strontiowhitlockite | Sr9Mg(PO4)6(PO3OH) |
| 8.AC.45 | Whitlockite | Ca9Mg(PO4)6(PO3OH) |
| 8.AC.45 | Merrillite | Ca9NaMg(PO4)7 |
| 8.AC.45 | Tuite | Ca3(PO4)2 |
| 8.AC.45 | Ferromerrillite | Ca9NaFe2+(PO4)7 |
| 8.AC.47 | Iwateite | Na2BaMn(PO4)2 |
| 8.AC.47 | Yurmarinite | Na7(Fe3+,Mg,Cu)4(AsO4)6 |
| 8.AC.47 | Ozerovaite | Na2KAl3(AsO4)4 |
| 8.AC.47 | Anatolyite | Na6(Ca,Na)(Mg,Fe3+)3Al(AsO4)6 |
| 8.AC.47 | Pansnerite | K3Na3(Fe3+,Al)6(AsO4)8 |
| 8.AC.50 | Chladniite | Na3CaMg11(PO4)9 |
| 8.AC.50 | Fillowite | Na3CaMn2+11(PO4)9 |
| 8.AC.50 | Johnsomervilleite | Na3CaFe11(PO4)9 |
| 8.AC.50 | Galileiite | Na3Fe2+Fe2+11(PO4)9 |
| 8.AC.50 | Xenophyllite | Na4Fe2+7(PO4)6 |
| 8.AC.50 | Udinaite | NaMg4(VO4)3 |
| 8.AC.50 | Arsenudinaite | NaMg4(AsO4)3 |
| 8.AC.52 | Lasnierite | (Ca,Sr)(Mg,Fe2+)2Al(P[O,F]4)3 |
| 8.AC.55 | Pharmazincite | KZnAsO4 |
| 8.AC.57 | Zubkovaite | Ca3Cu3(AsO4)4 |
| 8.AC.60 | Kosnarite | KZr2(PO4)3 |
| 8.AC.65 | Panethite | (Na,Ca)2(Mg,Fe2+)2(PO4)2 |
| 8.AC.70 | Stanfieldite | Ca4Mg5(PO4)6 |
| 8.AC.75 | Ronneburgite | K2MnV4O12 |
| 8.AC.80 | Tillmannsite | Ag3Hg[(V,As)O4] |
| 8.AC.85 | Filatovite | K(Al,Zn)2(As,Si)2O8 |
Other Information
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 Koksharovite
mindat.org URL:
https://www.mindat.org/min-43857.html
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References for Koksharovite
Reference List:
Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2013) New minerals and nomenclature modifications approved in 2013. CNMNC Newsletter No 16. Mineralogical Magazine, 77 (6) 2695-2709 doi:10.1180/minmag.2013.077.6.01
Pekov, Igor V., Zubkova, Natalia V., Yapaskurt, Vasiliy O., Kartashov, Pavel M., Polekhovsky, Yury S., Murashko, Mikhail N., Pushcharovsky, Dmitry Y. (2014) Koksharovite, CaMg2Fe3+4(VO4)6, and grigorievite, Cu3Fe3+2Al2(VO4)6, two new howardevansite-group minerals from volcanic exhalations. European Journal of Mineralogy, 26 (5) 667-677 doi:10.1127/0935-1221/2014/0026-2400
Localities for Koksharovite
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Russia (TL) | |
| Williams et al. (2013) +1 other reference |
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