Mindat Logo

Laphamite

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



Formula:
As
 
2
(Se,S)
 
3
System:MonoclinicColour:dark red
Hardness:1 - 2
Name:For US mineralogist Davis M. Lapham (1931-1974), former Chief Mineralogist of the Pennsylvania Geological Survey.
This page provides mineralogical data about Laphamite.

Classification of Laphamite

IMA status:Approved 1985
Strunz 8th edition ID:2/F.02-80
Nickel-Strunz 10th (pending) edition ID:2.FA.30

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
F : Sulfides of arsenic, alkalies; sulfides with halide, oxide, hydroxide, H2O
A : With As, (Sb), S
Dana 8th edition ID:2.11.6.1

2 : SULFIDES
11 : AmBnXp, with (m+n):p = 2:3
Hey's CIM Ref.:3.7.10

3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
7 : Sulphides etc. of V, As, Sb and Bi
mindat.org URL:http://www.mindat.org/min-2328.html
Please feel free to link to this page.

Type Occurrence of Laphamite

Type Locality:Burnside, Northumberland Co., Pennsylvania, USA
Year of Discovery:1985

Physical Properties of Laphamite

Colour:dark red
Streak:red-orange
Hardness (Mohs):1 - 2
Cleavage:Perfect

Crystallography of Laphamite

Crystal System:Monoclinic
Cell Parameters:a = 11.86Å, b = 9.75Å, c = 4.26Å
β = 90.17°
Ratio:a:b:c = 1.216 : 1 : 0.437
Unit Cell Volume:V 492.60 ų (Calculated from Unit Cell)

Chemical Properties of Laphamite

Formula:
As
 
2
(Se,S)
 
3
Simplified for copy/paste:As2(Se,S)3
Essential elements:As, Se
All elements listed in formula:As, S, Se

Relationship of Laphamite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
2.FA.05Duranusite
As
 
4
S
2.FA.10Dimorphite
As
 
4
S
 
3
2.FA.15bPararealgar
As
 
4
S
 
4
2.FA.15aRealgar
As
 
4
S
 
4
2.FA.15cUM1970-19-S:As
As
 
4
S
 
4
2.FA.15dUM1970-18-S:As
As
 
4
S
 
4
2.FA.20Alacránite
As
 
8
S
 
9
2.FA.25Uzonite
As
 
4
S
 
5
2.FA.30Orpiment
As
 
2
S
 
3
2.FA.35Getchellite
AsSbS
 
3
2.FA.40Wakabayashilite
[(As,Sb)
 
6
S
 
9
][As
 
4
S
 
5
]
Related Minerals - Hey's Index Grouping:

- +
3.7.1Patrónite
VS
 
4
3.7.2Duranusite
As
 
4
S
3.7.3Dimorphite
As
 
4
S
 
3
3.7.4Realgar
As
 
4
S
 
4
3.7.5Pararealgar
As
 
4
S
 
4
3.7.6Alacránite
As
 
8
S
 
9
3.7.7Uzonite
As
 
4
S
 
5
3.7.8Orpiment
As
 
2
S
 
3
3.7.9Jeromite
3.7.11Getchellite
AsSbS
 
3
3.7.12Wakabayashilite
[(As,Sb)
 
6
S
 
9
][As
 
4
S
 
5
]
3.7.13Pääkkönenite
Sb
 
2
AsS
 
2
3.7.14Stibnite
Sb
 
2
S
 
3
3.7.15Metastibnite
Sb
 
2
S
 
3
3.7.16Tellurantimony
Sb
 
2
Te
 
3
3.7.17Bismuthinite
Bi
 
2
S
 
3
3.7.18Nevskite
Bi(Se,S)
3.7.19Guanajuatite
Bi
 
2
(Se,S)
 
3
3.7.21Ikunolite
Bi
 
4
(S,Se)
 
3
3.7.22Laitakarite
Bi
 
4
Se
 
2
S
3.7.23Poubaite
PbBi
 
2
(Se,Te,S)
 
4
3.7.24Tellurobismuthite
Bi
 
2
Te
 
3
3.7.25Součekite
PbCuBi(S,Se)
 
3
3.7.26Tsumoite
BiTe
3.7.27Pilsenite
Bi
 
4
Te
 
3
3.7.28Hedleyite
Bi
 
7
Te
 
3
3.7.29Tetradymite
Bi
 
2
Te
 
2
S
3.7.30Joséite
Bi
 
4
TeS
 
2
3.7.31Joséite-B
Bi
 
4
Te
 
2
S
3.7.32Ingodite
Bi
 
2
TeS
3.7.33Sulphotsumoite
Bi
 
3
Te
 
2
S
3.7.34Kawazulite
Bi
 
2
Te
 
2
Se
3.7.36Skippenite
Bi
 
2
TeSe
 
2
3.7.37Kochkarite
PbBi
 
4
Te
 
7
3.7.38Rucklidgeite
(Bi,Pb)
 
3
Te
 
4
3.7.39Aleksite
PbBi
 
2
Te
 
2
S
 
2
3.7.40Junoite
Cu
 
2
Pb
 
3
Bi
 
8
(S,Se)
 
16

Other Names for Laphamite

Synonyms:
IMA1985-021
Other Languages:
German:Laphamit
Russian:Лафамит
Spanish:Laphamita

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 Laphamite

Reference List:

- +
Dunn, P. J., Peacor, D. R., Criddle, A. J. and Finkelman, R. B. (1986): Laphamite, an arsenic selenide analogue of orpiment, from burning anthracite deposits in Pennsylvania. Mineralogical Magazine, 50, 279-282. [Abs. in: American Mineralogist (1987): 72: 1024-1025.]

Stergiou, A.C. and P.J. Rentzeperis (1986) The crystal structue of arsenic selenide, As2Se3. Zeits. Kristallogr., 173, 185–191.



Internet Links for Laphamite

Search Engines:
  • Look for Laphamite on Google
  • Look for Laphamite images on Google
  • External Links:
  • Look for Laphamite on Webmineral
  • Look for Laphamite on Athena Mineralogy
  • Look for Laphamite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Laphamite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
  • Buy from McDougall Minerals
  • Buy RARE Minerals from Rocks of Africa
  • Find Laphamite on www.crystalclassics.co.uk
  • Fabre Minerals - search for Laphamite specimens
  • The Arkenstone - Fine Minerals
  • Top quality minerals from Kristalle of California
  • Fine minerals from bisbeeborn.com
  • Search for Laphamite on Well-Arranged Molecules
  • Wilensky Fine Minerals
  • Buy from David K Joyce minerals
  • Laphamite specimens for sale - minfind.com
  • Fine and rare minerals from mintreasure.com
  • Jobs:
  • Mining & Geology Jobs
  • Localities for Laphamite

    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.
    USA
     
    • Pennsylvania
      • Northumberland Co.
    Min.Mag.: 50:279 (1986), Dunn, et al.
    Mike Scott S105178 from Cureton ID by Wayne Downey 1986
    矿物 and/or 产地  
    谷歌搜索  
    版权所有© Jolyon Ralph 和周兰怡 1993年至2014年 网站地图 产地,矿物及照片的数据是有獨立各別的版权。欲求更多信息,请联系本站长 网站托管和开发 Jolyon Ralph。 Mindat.org是一个致力于免费提供所有有関於矿物学上所有信息資源的网站。 Mindat資訊是依靠全球成千過萬的成员和支持者的贡献。 Mindat不設提供矿物、岩石等物品出售。 如果阁下想參与提供添加有関矿物資訊或提高本数据库质量,請点击这里进行注册。.
    Current server date and time: 2014.1.5 08:00:27
    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