Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Mineral Chatroom The Mindat Store

Sarmientite

This page is currently not sponsored. Click here to sponsor this page.
Big Photo

Kotzebue, Northwest Arctic Borough, Alaska, USA
© 2008, JGW




Formula:
Fe
3+
2
(AsO
 
4
)(SO
 
4
)(OH) · 5H
 
2
O
System:MonoclinicColour:Light yellow-orange
Name:
Named for Domingo Faustino Sarmiento (1811-1888), Argentine educator & political leader (8th president), founder of the Cordoba Academy of Science.


Sanjuanite-Destinezite Group. Arsenate analogue of Diadochite

An uncommon secondary mineral occurring in oxidized pyritic veins in diabase.

Classification of Sarmientite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered" 1968
Strunz 8th edition ID:7/D.05-30
Nickel-Strunz 10th (pending) edition ID:8.DB.35

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
B : With only medium-sized cations, (OH, etc.):RO4< 1:1
Dana 8th edition ID:43.5.1.1

43 : COMPOUND PHOSPHATES, ETC.
5 : Hydrated Compound Phosphates, etc·, Containing Hydroxyl or Halogen
Hey's CIM Ref.:22.3.26

22 : Phosphates, Arsenates or Vanadates with other Anions
3 : Phosphates, arsenates or vanadates with sulphates
mindat.org URL:http://www.mindat.org/min-3536.html
Please feel free to link to this page.

Type Occurrence of Sarmientite

Type Locality:Santa Elena Mine, La Alcaparrosa, San Juan, Argentina
Place of Conservation of Type Material:The Academy of Natural Sciences of Philadelphia?
Year of Discovery:1941
Geological Setting of type material:Fe-sulfate gossan over pyrite vein.
Associated Minerals at type locality:
SzomolnokiteSzomolnokiteSlavíkiteGypsumFibroferrite
EpsomiteCopiapiteBotryogen

Physical Properties of Sarmientite

Lustre:Dull
Diaphaneity (Transparency):Translucent
Colour:Light yellow-orange
Density (measured):2.58 g/cm3
Density (calculated):2.58 g/cm3

Crystallography of Sarmientite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P21/b {P1 1 21/b} {P21/c} {P1 21/c 1} {P21/a}
Space Group Setting:P21/c
Cell Parameters:a = 6.55Å, b = 18.55Å, c = 9.70Å
β = 97.65°
Ratio:a:b:c = 0.353 : 1 : 0.523
Unit Cell Volume:V 1,168.08 ų (Calculated from Unit Cell)
Z:4
Morphology:Crystals prismatic [001] and flattened {010}, exhibiting {010}, {110} and {011}. Microcrystalline (to 20 μm) forming nodular masses as aggregates.

Optical Data of Sarmientite

Type:Biaxial (+)
RI values: nα = 1.628 nβ = 1.635 nγ = 1.698
2V:Measured: 38° , Calculated: 38°
Maximum Birefringence:δ = 0.070

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:weak to distinct

Chemical Properties of Sarmientite

Formula:
Fe
3+
2
(AsO
 
4
)(SO
 
4
)(OH) · 5H
 
2
O
Essential elements:As, Fe, H, O, S
All elements listed in formula:As, Fe, H, O, S

Relationship of Sarmientite to other Species

Structurally related to group(s):
Sanjuanite-Destinezite Group
Related Minerals - Nickel-Strunz Grouping):

- +
8.DB.05Diadochite
Fe
3+
2
(PO
 
4
)(SO
 
4
)(OH) · 5H
 
2
O
8.DB.05Pitticite
(Fe, SO
 
4
, AsO
 
4
, H
 
2
O) ?
8.DB.05Destinezite
Fe
3+
2
(PO
 
4
)(SO
 
4
)(OH) · 6H
 
2
O
8.DB.10Vashegyite
Al
 
11
(PO
 
4
)
 
9
(OH)
 
6
 · 38H
 
2
O
8.DB.15Schoonerite
ZnMn
2+
 
Fe
2+
2
Fe
3+
 
(PO
 
4
)
 
3
(OH)
 
2
 · 9H
 
2
O
8.DB.20Sinkankasite
H
 
2
Mn
2+
 
Al(PO
 
4
)
 
2
(OH) · 6H
 
2
O
8.DB.25Mitryaevaite
Al
 
6
(PO
 
4
)((P,S)O
 
3
(OH,O))
 
2
F
 
2
(OH)
 
2
 · 14.5H
 
2
O
8.DB.30Sanjuanite
Al
 
2
(PO
 
4
)(SO
 
4
)(OH) · 9H
 
2
O
8.DB.40Bukovskýite
Fe
3+
2
(AsO
 
4
)(SO
 
4
)(OH) · 7H
 
2
O
8.DB.45Zýkaite
Fe
3+
4
(AsO
 
4
)
 
3
(SO
 
4
)(OH) · 15H
 
2
O
8.DB.50Giniite
Fe
2+
 
Fe
3+
4
(PO
 
4
)
 
3
(OH)
 
5
 · 2H
 
2
O
8.DB.55Sasaite
(Al,Fe
3+
 
)
 
14
(PO
 
4
)
 
11
(SO
 
4
)(OH)
 
7
 · 83H
 
2
O
8.DB.60Mcauslanite
HFe
2+
3
Al
 
2
(PO
 
4
)
 
4
F · 18H
 
2
O
8.DB.65Goldquarryite
CuCd
 
2
Al
 
3
(PO
 
4
)
 
4
F
 
2
(H
 
2
O,F)
 
2
 · 10H
 
2
O
8.DB.70Birchite
Cd
 
2
Cu
 
2
(PO
 
4
)
 
2
(SO
 
4
) · 5H
 
2
O
8.DB.75Braithwaiteite
NaCu
 
5
Ti
 
2
Sb
 
2
(AsO
 
4
)(HAsO
 
4
)
 
2
O
 
2
 · 8H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
22.3.1Parnauite
Cu
 
9
(AsO
 
4
)
 
2
(SO
 
4
)(OH)
 
10
 · 7H
 
2
O
22.3.2Ardealite
Ca
 
2
(HPO
 
4
)(SO
 
4
) · 4H
 
2
O
22.3.3Machatschkiite
(Ca,Na)
 
6
(AsO
 
4
)(HAsO
 
4
)
 
3
(PO
 
4
,SO
 
4
) · 15H
 
2
O
22.3.4Clinotyrolite
Ca
 
2
Cu
 
9
(AsO
 
4
,SO
 
4
)
 
4
(OH,O)
 
10
 · 10H
 
2
O
22.3.5Peisleyite
Na
 
3
Al
 
16
(PO
 
4
)
 
10
(SO
 
4
)
 
2
(OH)
 
17
 · 20H
 
2
O
22.3.6Chalcophyllite
Cu
 
18
Al
 
2
(SO
 
4
)
 
3
(AsO
 
4
)
 
3
(OH)
 
27
 · 33H
 
2
O
22.3.7Woodhouseite
CaAl
 
3
(PO
 
4
)(SO
 
4
)(OH)
 
6
22.3.8Schlossmacherite
(H
 
3
O,Ca)Al
 
3
(SO
 
4
,AsO
 
4
)
 
2
(OH)
 
6
22.3.9Svanbergite
SrAl
 
3
(PO
 
4
)(SO
 
4
)(OH)
 
6
22.3.10Kemmlitzite
(Sr,Ce)Al
 
3
(AsO
 
4
)(SO
 
4
)(OH)
 
6
22.3.11Sanjuanite
Al
 
2
(PO
 
4
)(SO
 
4
)(OH) · 9H
 
2
O
22.3.12Kribergite
Al
 
5
(PO
 
4
)
 
3
(SO
 
4
)(OH)
 
4
 · 4H
 
2
O
22.3.13Hotsonite
Al
 
11
(SO
 
4
)
 
3
(PO
 
4
)
 
2
(OH)
 
21
 · 16H
 
2
O
22.3.14Weilerite
22.3.15Tsumebite
Pb
 
2
Cu(PO
 
4
)(SO
 
4
)(OH)
22.3.16Arsentsumebite
Pb
 
2
Cu(AsO
 
4
)(SO
 
4
)(OH)
22.3.17Hinsdalite
PbAl
 
3
(PO
 
4
)(SO
 
4
)(OH)
 
6
22.3.18Hidalgoite
PbAl
 
3
(AsO
 
4
)(SO
 
4
)(OH)
 
6
22.3.19Orpheite
22.3.20Coconinoite
Fe
3+
2
Al
 
2
(UO
 
2
)
 
2
(PO
 
4
)
 
4
(SO
 
4
)(OH)
 
2
 · 20H
 
2
O
22.3.21Sasaite
(Al,Fe
3+
 
)
 
14
(PO
 
4
)
 
11
(SO
 
4
)(OH)
 
7
 · 83H
 
2
O
22.3.22Tristramite
(Ca,U,Fe)(PO
 
4
,SO
 
4
) · 2H
 
2
O
22.3.23Corkite
PbFe
 
3
(PO
 
4
)(SO
 
4
)(OH)
 
6
22.3.24Beudantite
PbFe
 
3
(AsO
 
4
)(SO
 
4
)(OH)
 
6
22.3.25Diadochite
Fe
3+
2
(PO
 
4
)(SO
 
4
)(OH) · 5H
 
2
O
22.3.27Bukovskýite
Fe
3+
2
(AsO
 
4
)(SO
 
4
)(OH) · 7H
 
2
O
22.3.28Zýkaite
Fe
3+
4
(AsO
 
4
)
 
3
(SO
 
4
)(OH) · 15H
 
2
O
22.3.29Tooeleite
Fe
3+
6
(As
3+
 
O
 
3
)
 
4
(SO
 
4
)(OH)
 
4
 · 4H
 
2
O
22.3.30Pitticite
(Fe, SO
 
4
, AsO
 
4
, H
 
2
O) ?
22.3.31Xiangjiangite
(Fe
3+
 
,Al)(UO
 
2
)
 
4
(PO
 
4
)
 
2
(SO
 
4
)
 
2
(OH) · 22H
 
2
O

Other Names for Sarmientite

Other Languages:
German:Sarmientit
Spanish:Sarmientita

Other Information

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 Sarmientite

Reference List:

- +
Angelelli, V. & Gordon, S.G. (1941); Notulae Naturae, Academy of Sciences, Philadelphia: no. 92.

Angelelli and Gordon (1942) Publ. Inst. de Fisiog. y Geol., Univ. Nac. del Litoral, Argentina: no. XII.

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.: 1013-1014.

de Abeledo, M.E.J. & de Benyacar, M.A.R. (1968), American Mineralogist: 53: 2077-2082.

Internet Links for Sarmientite

Search Engines:
  • Look for Sarmientite on Google
  • Look for Sarmientite images on Google
    • External Links:
  • Look for Sarmientite on Webmineral
  • Look for Sarmientite on Athena Mineralogy
  • Look for Sarmientite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Sarmientite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Rare and Unusual minerals at Mineralogical Research Company
  • The Arkenstone - Fine Minerals
  • Edwards Minerals - Fine Specimens
  • webminerals
  • Search for - Sarmientite - on e-Rocks Mineral Sales & Auctions
  • Search for Sarmientite from all mineral dealers at minfind.com
  • Fine Minerals from Weinrich Minerals, Inc.
  • Buy fine minerals and gemstones from Pala International
  • High-end worldwide specimens & outstanding customer service
  • Buy RARE Minerals from Rocks of Africa
  • Pricedownminerals.com - Reverse Auctions and Shop
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
    • Jobs:
  • Mining & Geology Jobs

    • Localities for Sarmientite

    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.
    Hide Locality List
    (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.
    Argentina
     
    • San Juan
      • La Alcaparrosa
    		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: 480, 609, 1014.
    Morocco
     
    • Souss-Massa-Draâ Region
      • Ouarzazate Province
        • Tazenakht
          • Bou Azer District (Bou Azzer District)
    		M.E. Ciriotti collection [S. Möckel 2010 - EDX+PXRD]
    South Africa
     
    • KwaZulu-Natal Province
    		Minerals of South Africa
    USA
     
    • Alaska
      • Northwest Arctic Borough
    		Excalibur mineral specimen
    • Nevada
      • Humboldt Co.
    		NBMG Spec. Pub. 31 Minerals of Nevada
      • Nye Co.
        • Manhattan District
          • Manhattan
    		NBMG Spec. Pub. 31 Minerals of Nevada
    Mineral and/or Locality
    Search Google
     
    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the 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 hundreds 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.
    Current server date and time: 17th Sep 2011 18:58:51
    Mineral and Locality Search
    Mineral:
    and/or Locality:
    Options
    Fade toolbar when not in focusFix toolbar to bottom of page
    Hide Social Media Links
    Slideshow frame delay seconds