Langhofite, ideally Pb2(OH)[WO4(OH)], is a new mineral from the Långban mine, Värmland, Sweden (IMA-CNMNC 2019-005). It occurs in a small vug in hematite-pyroxene skarn associated with calcite, baryte, fluorapatite, mimetite and minor sulfide minerals. Langhofite is triclinic, space group P – 1, and unit cell-parameters a = 6.6154(1) Å, b = 7.0766(1) Å, c = 7.3296(1) Å, α = 118.175(2)o, β = 94.451(1)o, γ = 101.146(1)o and V = 291.06(1) Å 3 for Z = 2. The 7 strongest Bragg peaks from powder X-ray diffractometry are [dobs Å (I)(hkl)]: 6.04(24)(010), 3.26(22)(11-2), 3.181(19)(200), 3.079(24)(1-12), 3.016(100)(020), 2.054(20)(3-11) and 2.050(18)(13-2). Langhofite occurs as euhedral crystals up to 4 mm, elongated along the a-axis, with lengthwise striation. Mohs hardness is ca. 21⁄2, based on VHN25 data obtained in the range 130˗192. The mineral is brittle, with perfect {010} and

中文翻译：

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Langhofite，Pb2(OH)[WO4(OH)]，一种来自瑞典朗班的新矿物

Langhofite，理想的 Pb2(OH)[WO4(OH)]，是来自瑞典 Värmland 的 Långban 矿的一种新矿物 (IMA-CNMNC 2019-005)。它发生在与方解石、重晶石、氟磷灰石、闪铁矿和少量硫化物矿物相关的赤铁矿-辉石矽卡岩中的一个小孔洞中。Langhofite 是三斜晶系，空间群 P – 1，晶胞参数 a = 6.6154(1) Å, b = 7.0766(1) Å, c = 7.3296(1) Å, α = 118.175(2)o, β = 94.451 (1)o, γ = 101.146(1)o 和 V = 291.06(1) Å 3，对于 Z = 2。粉末 X 射线衍射的 7 个最强布拉格峰是 [dobs Å (I)(hkl)]：6.04 (24)(010)、3.26(22)(11-2)、3.181(19)(200)、3.079(24)(1-12)、3.016(100)(020)、2.054(20)(3-) 11) 和 2.050(18)(13-2)。Langhofite 以自形晶体的形式出现，最大可达 4 毫米，沿 a 轴拉长，具有纵向条纹。莫氏硬度约为。21⁄2，基于在 130˗192 范围内获得的 VHN25 数据。